VHF SOTA Near Fairbanks

Posted on 7 July 2019 by Bob K0NR — No Comments ↓

Joyce/K0JJW and I were planning a trip to Alaska to visit several of the national parks. We had some time available while in Fairbanks to do some SOTA activations. We were traveling very light, so we took minimal SOTA gear: a pair of VHF/UHF handhelds and simple antennas.

The lightweight VHF/UHF SOTA outfit: Just a pair of Yaesu FT-1DR handheld transceivers, spare battery and basic antennas (rubber duck and RH 770).

We used my newly-fashioned antenna mount on a trekking pole we had with us. The trekking pole served us as as a trekking pole for hiking, a camera monopod and now an antenna support. It provides a handy way of supporting a vertical antenna and provides a little more antenna height when held up in the air.

The trekking pole with antenna mount attached. An RH 770 antenna attaches to the BNC connector on top.

I checked the SOTA database to identify easy-to-access summits near Fairbanks. There are several 1 and 2 point summits in the area with easy access. We were not looking for drive-up summits but we did want an easy hike.

I found that Dale/KL7R and Peter/K3OG had been activating in the area, so I contacted them via email and they both gave me helpful advice. We were a bit concerned about getting our four QSOs on VHF, but that turned out to not be a problem. We worked Dale from all three summits and he helped rustle up a few more stations to work. We had pretty good luck just calling CQ on 146.52 MHz. And I announced our presence and need for simplex contacts on the KL7KC repeater (146.88 MHz, 103.5 Hz tone).

We activated three summits:

Chena Ridge (KLF/FN-205)

We drove up Chena Ridge Road, then took a gravel road uphill towards the summit (I think it was labeled North Becker Ridge Road). At this point, we encountered a locked gate and parked there. Some locals wandered by and said that they hike up to the top every day, so come along. The hike was easy, less than one quarter of a mile with some elevation gain. At the summit is an FAA VOR site enclosed by a chain link fence.

Pedro Dome (KLF/FN-164)

Next, we drove north out to Pedro Dome, which has a substantial radio site on top. We took Steese Highway north from Fairbanks to Pedro Dome Road, a gravel road that goes right to the top of the summit. There are opportunities to make a wrong turn on the way up Pedro Dome Road but with a little care we were able to drive to the top. Despite the fact there are plenty of radio transmitters on the summit, we did not experience any interference on 2m and 70 cm. That summit has an excellent radio horizon, so it was easy to work stations in the Fairbanks area.

Bob/K0NR holds the trekking pole with RH 770 antenna attached, on Pedro Dome. The radio site is visible in the background.

Wigwam Benchmark (KLF/FN-204)

Wigwam Benchmark is a summit that pokes up just north of Fairbanks. It is a bit more difficult to navigate because it in a rural residential area with lots of twisty-turny roads. I plugged “Noel Drive, Fairbanks, AK” into google maps, which got us very close. Then we drove to where Noel Drive meets Mia Drive and operated from the road. The area is heavily wooded and we did get attacked by the famous Alaskan mosquitoes, so we made our radio contacts and escaped quickly.

Summary

At one point, I told Dale that if we made one contact from one summit, we would be happy. But, of course, we tried for more than that and got it. It turned out to be a great day running around these summits near Fairbanks and making some radio contacts. Thanks to KL7R and K3OG for the assistance!

73 Bob K0NR

Summits On The Air VHF Mountain Goat

Posted on 29 June 2019 by Bob K0NR — 7 Comments ↓

My Summits On The Air (SOTA) activation of Pikes Peak (W0C/FR-004) on June 20th qualified me for Mountain Goat, using only the VHF/UHF bands. Mountain Goat requires 1000 activation points using the SOTA activation point system.

Bob/K0NR operating from Pikes Peak on 20 June 2019 to complete Mountain Goat.

I’ve been working toward this goal for quite a while. I was doing mountaintop VHF activations before SOTA was even a thing. The first contact in my SOTA log is from Mount Antero in August 2011 but I started cranking up the SOTA activations in 2013 and later. I chose Pikes Peak for my qualifying Mountain Goat activation because its always been a special summit for me: I see it almost every morning (weather permitting) from my house in Monument. It is America’s Mountain, reaching to over 14k feet in elevation, standing tall west of Colorado Springs.

My custom Mountain Goat Award certificate made by Steve/WG0AT.

Most people have to wait for the mail to receive their SOTA Mountain Goat certificate. However, Steve/WG0AT created a custom award certificate that Joyce presented to me on the summit of Pikes Peak.

Paul/W0RW captured this webcam photo of Joyce/K0JJW and me standing near the summit house on Pikes Peak.

Some statistics from my SOTA log: I made 1557 radio contacts during 164 activations. Some of these activations were repeats of the same summit and I activated 96 unique summits. On 9 of those activations, I failed to complete the minimum of 4 radio contacts required to receive points; so I “got skunked” on those summits (zero points).

The majority of these summits were in Colorado, but I also did some operating from California, South Dakota, New Mexico, Wyoming, Utah, Oklahoma, Nebraska, Tennessee, North Carolina, Georgia, Arkansas, Texas and (last but not least) Switzerland. Almost all of them with my awesome wife and hiking partner, Joyce/K0JJW. Take a look at the various SOTA postings on my blog for trip reports and operating tips.

Chasers

Any SOTA activator will tell you that nothing happens without chasers being there to make radio contacts. Chasers are always important but even more important for VHF due to the limited range. The list below shows my top chasers. Some of these folks are active SOTA enthusiasts but many of them are just friendly folks on the radio helping me achieve this goal. You’ll see that my #1 chaser is Joyce/K0JJW, who usually worked me on multiple bands after leaving the summit.

Thank you, Chasers, for your support!

Many people underestimate what is possible on the VHF/UHF bands, even under normal conditions. I’ve been trying to educate folks on what is possible with VHF from high locations. See The Myth of VHF Line of Sight. Beefing up your station with a directional antenna and a little bit of power can make a big difference, even when just using FM. My best DX using VHF on a SOTA activation is a 2m CW contact from Capulin Mountain with W9RM near Olathe, CO for a distance of 257 miles.

The Summits On The Air program is a fantastic way to enjoy the outdoors while having fun with ham radio. Thanks to everyone that helped me reach my goal of VHF Mountain Goat.

73 Bob K0NR

VHF/UHF Omni Antenna for SOTA Use

Posted on 17 June 2019 by Bob K0NR — 2 Comments ↓

For Summits On The Air (SOTA), I’ve been using just the VHF/UHF ham bands, with the 2m band being the most popular. For most activations, I use a 3-element Arrow II yagi antenna that has a gain of about 6 dBd. Sometimes that extra gain makes the difference between completing a contact or not.

Omnidirectional Antenna

RH770 dualband antenna — The RH770 Dualband Antenna with BNC Connector

But it is also handy to have an omnidirectional antenna that is easy to deploy. Sometimes I’d rather just call or monitor using an omni without having to point the antenna. “Easy and good enough” can be an effective strategy for SOTA.

A key advantage to an omnidirectional antenna is that it is always pointed in the right direction.

I usually carry one of the TWAYRDIO RH770 VHF/UHF antennas for use with my 2m/70cm handheld transceiver. Despite its low cost, I have found that its performance to be quite good. That antenna is offered with a variety of connectors, including a BNC.

This led me to the idea of putting together a simple antenna mount with a BNC on it, attach an RH770 antenna to it and support it using some kind of pole. I have several monopod devices (intended for use as a camera support) that use the standard 1/4-20 thread. I also have a trekking pole that has the same camera mounting thread. Another option is to use an actual camera tripod which is a bit bulky but may work for some SOTA activations.

After a short visit to the hardware store, I selected crossbar for mounting a light fixture that was about the right size and shape. I happened to have a bulkhead-mount BNC-to-BNC connector which I inserted into the large hole in the crossbar. That hole was not quite large enough for the connector, but a few minutes work with a round file solved that problem.

After some filing to expand the hole, the bulkhead BNC connector (female-to-female) was inserted into the main hole in the crossbar.

The crossbar was originally flat but I bent one one end of it 90 degrees, with the idea that this might offer other mounting configurations in the future. For example, I might be able to strap or tape the 90 degree angle member to a pole or support.

The monopole support is inserted into one of the slots of the crossbar. Again, some filing was required to make the slot big enough for the 1/4-inch thread.

The other end of the crossbar has a large slot that accommodated the 1/4-20 mounting stud. Actually, the slot was not quite wide enough, so some addition work with a round file opened it up. I secured the 1/4-20 thread using a nylon wing nut.

A nylon wing nut (1/4-20 thread) is used to attach the crossbar mount to the monopod.

I’ve used this setup on one SOTA activation and was pleased with the results. I carried the crossbar mount attached to the monopod in my pack. On the summit, I simply installed the RH770 antenna onto the top BNC and extended the monopod. On this summit, I found the perfect pile of rocks that made a good support for the monopod. Then I used a short length of RG-8X coax between the bottom BNC and the 2m/70cm transceiver.

The antenna support in use: the RH770 antenna attaches to top BNC connector, the crossbar mount attaches to the monopole which jammed into a pile of rocks on the summit. An RG-8X coaxial cable feeds the antenna through the bottom BNC connector.

Although my primary interest was with the 2 meter band, it was really convenient to have both 2m and 70cm on the same antenna. I am pleased with operation of the antenna and the ability to deploy it quickly. I expect to carry this on most of my SOTA activations.

73 Bob K0NR

Handheld Transceiver Accumulation Syndrome

Posted on 1 June 2019 by Bob K0NR — 8 Comments ↓

A Handheld Transceiver (HT) is a convenient, compact all-in-one wireless device for FM operating on the VHF/UHF bands. HTs are sometimes referred to as a Shack On The Belt. There’s a lot to like about a transceiver that has wide frequency range, built-in antenna and power source.

Handheld transceivers may start to accumulate for no apparent reason.

The attractiveness of these devices coupled with a distinct lack of self-control on the part of some radio amateurs can lead to a condition known as Handheld Transceiver Accumulation Syndrome (HTAS). The main indicator of HTAS is that the radio amateur (the HTAS patient) accumulates a large number of HTs for no apparent reason. These radios end up sitting on the shelf or workbench at home, largely underutilized.

Typically, a pile of battery chargers accumulate, all proprietary and incompatible.

Coincident with the accumulation of radios, there is usually a pile of battery chargers, both drop-in and wall-wart style. These chargers are almost always proprietary designs that work with the original radio but no others.

The chargers are just the beginning of a broader accessory quagmire. The HTAS sufferer also tends to accumulate other accessories such as DC power cables, extra battery packs, speaker/microphones and aftermarket antennas. Many of these are also unique to the specific model of HT.

Psychologists that study HTAS note that there are specific buying habits that play into this harmful condition:

The Impulse Buy

HTs have always been relatively affordable with street prices of less than $200. However, the situation changed in the last decade with the introduction of cheap HTs from the Chinese manufacturers, driving the entry price down to around $30. This puts a VHF/UHF radio in the price range of a tank of gas or dinner at a local restaurant, clearly setting up an HT as an impulse buy. “Heck, its only $30, so why not buy the camo version of the Baofeng radio?”

The Mode Buy

Sometimes the HTAS patient is motivated to buy another HT to fill in a specific capability that is missing in their ham radio gear. Of course, the equipment manufacturers are complicit in this — introducing new features and modulation types to drive additional purchases. No single radio does it all, so you need multiple devices to cover a range of features, such as APRS, DMR, D-STAR and Fusion. “I need this new HT to work the other guys on DMR.”

The Special Purpose Buy

A really subtle driver of purchasing behavior is buying a radio for a specific purpose. This is similar to the Mode Buy but is driven by a specific situation. The patient conjures up specific communication needs that justify a particular radio. For example, they may think “I need a small HT that fits in my shirt pocket while doing work around the house.” Or “I need a little DMR radio just to talk to my hotspot.” Another one is “I need to keep a Baofeng in the glove compartment of the car, just in case.”

Living with HTAS

Fortunately, medical professionals that encounter HTAS report that in most cases the syndrome is not completely debilitating. Many radio amateurs are able to lead normal lives while suffering from the effects of HTAS. In severe cases, HTAS can lead to financial problems, depending on income level and the severity of the problem. HTAS is also associated with a breakdown in personal relationships, especially with married subjects. HTAS sufferers living alone report far fewer relationship problems.

If you know someone suffering from HTAS, encourage them to seek professional help. Treatment options may include psychotherapy and medication.

73 Bob K0NR

Go Ahead and Use Phonetics on 2m FM

Posted on 18 May 2019 by Bob K0NR — 4 Comments ↓

Sometimes radio amateurs suggest that phonetics are not needed on VHF FM. (See examples here and here.) Sometimes it even sounds like it’s a bad thing to use phonetics on FM. It is inefficient and slows things down. I can see the logic behind this because with decent signal strength, demodulated FM audio is usually quite clear and easy to understand.

Here’s what I wrote in my VHF FM Operating Guide, also downplaying the need for phonetics:

The use of phonetics is not usually required due to the clear audio normally associated with frequency modulation. Still, sometimes it is difficult to tell the difference between similar sounding letters such as “P” and “B”. Under such conditions, use the standard ITU phonetics to maintain clarity. Many nets specifically request the use of standard phonetics to make it easier on the net control station.

The FCC Technician exam gives the topic of phonetics a light touch with just these two questions:

T1A03 (D)
What are the FCC rules regarding the use of a phonetic alphabet for station identification in the Amateur Radio Service?

A. It is required when transmitting emergency messages
B. It is prohibited
C. It is required when in contact with foreign stations
D. It is encouraged

And this one:

T2C03 (C)
What should be done when using voice modes to ensure that voice messages containing unusual words are received correctly?

A. Send the words by voice and Morse code
B. Speak very loudly into the microphone
C. Spell the words using a standard phonetic alphabet
D. All of these choices are correct

Use Phonetics

In practical radio operating, there are a number of things that can degrade communication, usually by creating noise sources that compete with the voice modulation. Most of these are a factor even if the RF signal is strong:

A noisy environment at the receiving end (e.g., background noise such as road noise in an automobile)
A noisy environment at the transmitter (e.g., background noise such as wind noise outdoors)
Poor frequency response of the overall system (e.g., high frequencies may be lost in the transmitter, receiver or repeater, making it more difficult to understand the voice communication).
Hearing impairment of the person receiving the audio (I’ve heard that we are all getting older)
Difficulty understanding the person speaking (poor enunciation, unfamiliar dialect or accent, etc.)

So I say go ahead and use phonetics on VHF FM, especially for critical information such as your call sign. FM communication is not always clear and easy to understand. It suffers from the same signal-to-noise problems as other voice modes. (Perhaps not as bad as SSB on HF, but it’s still a factor.) In most cases, you’ll want to stick with the standard ITU phonetic alphabet (also known as the NATO alphabet).

Many nets request that you use ITU phonetics when you check in. Imagine being the Net Control Station for a net and having everyone making up their own phonetics. You would have call signs coming at you with all kinds of random words associated with them. It is much better to have consistency. However, there are times when you might want to use alternative phonetics. See the HamRadioSchool.com article: Phonetic Alphabets for more insight on that.

73, Bob
Kilo Zero November Romeo

Go Ahead and Call CQ on 2m FM

Posted on 1 May 2019 by Bob K0NR — 15 Comments ↓

The conventional wisdom in amateur radio is that we should not call CQ when using FM on the VHF and UHF bands, especially on repeaters. The reasoning for this is that during normal VHF/UHF FM operating, radio amateurs are tuned to a specific frequency and will easily hear a call on FM.

Compare this to the HF bands, where the other ham is generally tuning around to find someone to contact and stumbles onto your transmission. In that case, you want to make a long call (CQ CQ CQ Hello CQ This is Kilo Zero November Romeo calling CQ CQ CQ…) so people tuning the band will find you and tune you in. On VHF/UHF FM, the assumption is that the other hams have their radio set on the repeater or simplex channel being used and will immediately hear you. FM communications are often quite clear and noise free, which also helps. The normal calling method is to just say your callsign, perhaps accompanied with another word like “monitoring” or “listening.” For example, I might say “KØNR monitoring.”

Question T2A09 in Technician exam pool reinforces this idea:

T2A09 (B)
What brief statement indicates that you are listening on a repeater and looking for a contact?
A. The words “Hello test” followed by your call sign
B. Your call sign
C. The repeater call sign followed by your call sign
D. The letters “QSY” followed by your call sign

Gary/KN4AQ wrote this tongue-in-cheek article HamRadioNow: Do NOT Call CQ on Repeaters which says that calling CQ on a quiet repeater works well because it is likely that someone will come on and tell you not to call CQ. Gary wrote:

So I trot out my standard advice: make some noise. I even recommend calling CQ, because that’s almost guaranteed to get someone to respond, if only to tell you that you’re not supposed to call CQ on repeaters.

There is also an interesting thread on the topic on reddit: 2 meter calling frequency.

Scanning and Multitasking

Some important things have changed in our use of VHF/UHF FM over past decades. The most important shift is dispersion of activity: while the number of VHF/UHF channels has increased, the total amount of VHF/UHF radio activity has declined. This means that we have tons of channels available that are mostly quiet. Tune the bands above 50 MHz and you’ll hear a lot of dead air. In response to this, some hams routinely scan multiple repeater and simplex frequencies. While getting ready for Summits On The Air (SOTA) activity, I’ve had hams ask me to make a long call on 146.52 MHz so they can be sure to pick me up on scan.

Another factor that comes into play is the multitasking nature of our society. Hams don’t generally sit in front of a 2m radio waiting for activity to occur. More commonly, they are doing something else and listening to the FM rig in the background. VHF FM is the Utility Mode, always available but not necessarily the top priority. A short call (“KØNR listening”) on the frequency can easily be missed.

Recommendations

My conclusion is that the Old School “KØNR Monitoring” style of making a call on VHF is no longer sufficient. First off, it sends the message of “I am here if you want to talk to me.” If that’s your intent, fine. However, if you really want to make a contact, being more explicit and a bit assertive usually helps. Follow Gary’s advice and make some noise.

For example, during a SOTA activation I’ll usually call on 146.52 MHz with a bit of a sales pitch. Something like: “CQ CQ 2 meters, this is Kilo Zero November Romeo on Pikes Peak, Summits On The Air, anyone around?” This is way more effective than “KØNR Monitoring.” I might also include the frequency that I am calling on, to help out those Scanning Hams. Something like “CQ CQ 146.52, this is KØNR on Pikes Peak, Summits On The Air.” Note that these calls are still pretty much short and to the point, only taking about 15 seconds. This is a lot shorter than the typical HF CQ.

If I am driving through another town and want to make contact on the local repeater, I will adjust my approach accordingly. For example, on a relatively quiet repeater, I might say “CQ, anyone around this morning? KØNR mobile I-25 Denver.” Or if I have a specific need, I’ll go ahead and ask for it. “This is KØNR looking for a signal report.”

Keep in mind that VHF/UHF operating tends to be local in nature, so it makes sense to adapt your approach to both local practice and the specific situation.

It’s OK to call CQ on VHF FM, make some noise on the frequency.
Give other operators a reason to contact you.
Don’t make your CQ too long, maybe 15 to 20 seconds.
The callsign/listening approach is fine too.

Those are my thoughts. What do you think?

73 Bob K0NR

Radio Club Petitions FCC To Fix Call Area Confusion

Posted on 1 April 2019 by Bob K0NR — 7 Comments ↓

The Sundance Mountain Radio Association recently filed a Petition for Rulemaking asking the FCC to reestablish consistency between the call area indicated by an amateur radio callsign and its actual physical location. The current rules allow an amateur radio licensee to retain their current callsign when moving to a new call area and to operate outside of their normal call area without any special indicator. The proposed changes would no longer allow this practice and would force a change to all existing licenses to match the station location indicated on the amateur radio license.

In its petition, the Sundance Mountain Radio Association asserts that there is unnecessary and harmful confusion caused to daily amateur radio operation because the radio callsign is not a reliable indicator of station location. “It is common to work a W9 station and find out the guy actually moved to Florida years ago,” said Leroy Walker (KVØCO), President of the Sundance Mountain Radio Association (Palmer Lake, CO). “This wastes precious time when I am trying to work a particular state or area of the country. The other day, a KL7 station came booming in on 160m and I thought I had a new DXCC entity. Turns out, he was in Nebraska.”

License Modification

The petition proposes that the FCC automatically modify all amateur radio callsigns in the Universal Licensing System such that the call area indicated in the license matches the station location on record. For example, a licensee with the callsign W6ABC living in Texas would receive a new callsign, W5ABC. In the event that W5ABC is not an available callsign, W6ABC would receive a sequentially-issued callsign from Group A, Group B, Group C or Group D, depending on license class. The petition proposes that all future changes in station location be subject to the same procedures, ensuring that all callsigns are consistent with geographical call area. In addition, all vanity license applications must conform to this rule. Radio amateurs operating outside their call area temporarily will be required to identify as “portable” or “mobile” and indicate the actual operating call area (e.g., W6ABC/5).

This is an initial Petition for Rulemaking and the FCC has not yet responded. Walker mentioned that this proposal is the first of many expected to be put forth by the radio club’s Committee to Fix Amateur Radio. Leroy said, “We’ve got a really smart group of guys coming up with some great ideas to improve ham radio.”

Please note the date of publication.
Filed as #satire #humor #fakenews

FCC Considers Changes to Amateur Radio Licensing

Posted on 25 March 2019 by Bob K0NR — 22 Comments ↓

The FCC has invited public comments on two proposals to change the licensing requirements for amateur radio operators. Both of these proposals are aimed at attracting and retaining new amateur radio licensees.

Tyro

The first one is the “Tyro” license proposal from Gary/AD0WU that creates a new license class with minimal licensing requirements and operating privileges on the 70 cm band. See the complete proposal on the FCC website.

I find this proposal severely flawed with way too many details that would need to be written into Part 97. For example, the proposal establishes 99 specific repeater/simplex channels in the 430 MHz portion of the band. Oh, and the repeaters use a non-standard 9 MHz offset. There’s lots more in the proposal that make it a non-starter.

Still there is a nugget of an idea in here: a GMRS-like entry-level amateur radio license that is super easy to get. This could be an easy-peasy gateway into ham radio for kids, spouses and family members. However, I expect the FCC to just dismiss this petition without serious consideration.

Enhanced Technician

The second proposal is from the ARRL (see this ARRL news item):

The FCC has invited public comments on ARRL’s 2018 Petition for Rule Making, now designated as RM-11828, which asks the FCC to expand HF privileges for Technician licensees to include limited phone privileges on 75, 40, and 15 meters, plus RTTY and digital mode privileges on 80, 40, 15, and 10 meters.

The proposal would “add limited High Frequency (HF) data and telephony privileges to those currently available to Technician Class Amateur licensees.” The objective is to sweeten the Technician privileges to both attract new licensees and to retain existing Technicians (and maybe get them interested in moving up to General). There is an assumption/belief/hope that providing some HF telephony and digital privileges will accomplish these goals.

I am disappointed in the lack of data-driven analysis in support of this proposal. The ARRL filing claims that they “studied the comparable entry level license class operating privileges of other countries” but provided no data. There are different licensing schemes around the world…maybe we should compare and learn something from them. The data they did provide was survey data of ARRL members…which is really just an opinion poll: what do you think we should do with the licensing structure? This is not a great way to create public policy.

What’s the Objective?

Let’s start with the objective, which the ARRL petition says is “developing improved operating capabilities, increasing emergency communications participation, improving technical self-training, and increasing growth overall in the Amateur Radio Service.” I think this is a reasonable goal.

For some reason, every time there is a concern about improving and growing amateur radio, the proposed solution is a change in the licensing structure (usually to make it easier to obtain operating privileges). If the only tool you have is a hammer, everything looks like a nail. While the licensing structure should be improved over time, it should not be the first (or only) tool to apply. The ARRL needs to take a much more strategic approach to working towards the objective. Fortunately, I see positive signs they are moving in the right direction. See ARRL CEO Howard/WB2ITX Speaks.

Back To Licensing

There is a worthy idea in the ARRL proposal:
Change the entry level license (Technician) to provide a taste of HF phone and digital privileges, so it attracts more people to the hobby AND get them more deeply engaged. This might actually work.

I am not an unbiased observer because I have plenty of fun playing around with radios on frequencies above 50 MHz. I originally thought I would be a Technician for life but gradually got pulled into the fun below 30 MHz. So part of my brain says “Technicians just need to figure out how to have fun on VHF/UHF.” There is a lot to be said for having the entry level license be focused on VHF/UHF to learn basic radio operating. HF can come later.

Another part of my brain sees the excitement and growing popularity of the WSJT-X digital modes, especially FT8. Why do Technicians get to use CW on some of the HF bands but not other digital modes? That seems kind of silly in the year 2019. And making HF contacts with other states and countries on SSB is a lot of fun, too.

Another question to ask is “what harm could be done by this proposal?” We could see a lot more activity in the portions of the HF bands Technicians are given. Maybe so much that those subbands get overrun with signals…seems like a potential problem. Some people have argued that giving Technicians these HF privileges will cause them to not upgrade to General. That seems like a low risk…if they get hooked on HF operating, they will upgrade to get access to additional spectrum.

There are really two assumptions in play here:

Attract Assumption: More people will be attracted to ham radio due to the expanded Technician HF privileges.
Retain Assumption: That Technicians will be more engaged in ham radio activity due to the expanded HF privileges (perhaps upgrading to higher license classes).

The distribution of US amateur radio licenses is roughly Amateur Extra (20%), General (23%) and Technician (50%), the remaining 7% are Novice and Advanced. So roughly half of US radio amateurs have decided to get their “VHF oriented” license while the other half have gone on to get an “HF privileged” license. Frankly, I don’t see the General license exam as a big barrier…I see people studying for it in our license classes and 90% of them are successful on the exam. But the exam is yet another thing to do, so it does represent an obstacle to overcome, just not a big one. What I do see them struggling with is actually getting on the air with HF. See Getting On HF: The Fiddle Factor. Easier licensing is not going to address that problem.

Who Wants HF?

Many Technicians are just fine with the operating privileges they have. I even noted some Tech’s complaining they are tired of OF hams telling them they need to fall in love with HF. Interesting. I don’t have reliable data on what Technicians think but I see several types of Technicians that are quite happy with their existing privileges:

Family/Friend Communicators – these folks are not hard core radio amateurs but they got their license to communicate with friends and family.
Outdoor Enthusiasts – these folks use ham radio to augment their outdoor activities: hiking, biking, offroad driving, camping, fishing, etc.
Emcomm and Public Service Volunteers – these hams are involved in local emergency response, support of served agencies (Red Cross, Salvation Army, etc.) or providing communications support for marathons, parades, charity walks, etc.
Technical Experimenters – many radio amateurs are into experimenting with technology and the bands above 50 MHz offer a lot of opportunity for that.

I don’t know what percentage of Technicians are unconcerned about HF privileges but it is significant (half of them? perhaps more?) Providing HF privileges to this group will not have much of an effect. It seems like the ARRL should have data on this before serving up a proposal to change the licensing structure.

My Thoughts

What do I think? I think this proposal most likely will not make a significant difference with regard to attracting and retaining new radio hams. Something else is needed to do that, such as effective training programs, strong local clubs and mentors available to help newbies get started and build skills.

But it might just work. Maybe HF is the bright shiny object that will motivate people to pursue amateur radio.

So count me as agnostic on this proposal. I won’t be filing comments with the FCC. What do you think?

73 Bob K0NR

Top Ten FT8 Advantages For Slackers

Posted on 14 March 2019 by Bob K0NR — 2 Comments ↓

We just got back from a very enjoyable trip to Roatan Island that included 8 friends vacationing together. The snorkeling and beach time were lots of fun. We stayed at the Seaside Inn, highly recommended.

Bob working SSB on Roatan Island as K0NR/HR9

Of course, I took along some ham radio gear and made radio contacts from the island using the Slacker DXpedition method. The station was a Yaesu FT-991 driving an end-fed half wave wire antenna, cut for either 20m or 40m. I operating as K0NR/HR9 and my co-slacker Denny was on the air as KB9DPF/HR9. (Reciprocal licensing info is available from the Radio Club De Honduras.) We started out on SSB but that was tough going with poor propagation, so we soon found that FT8 was more effective.

We were pleasantly surprised with how well FT8 worked out for us as it was very compatible with the Slacker DXpedition philosophy. Now I know that some people find FT8 boring and useless. It certainly is a slow-moving mode, but we found in quite useful for a Slacker DXpedition.

Here are the Top Ten Reasons to Use FT8 for Island Time DX:

You can listen to your “island time” playlist while working DX.
You don’t annoy your fellow vacationers by screaming into the microphone.
You don’t have to worry about remembering proper phonetics.
You can read the other station’s QRZ page while the computer completes the contact.
You have time to visit the restroom without missing any contacts.
You can upload your log to LoTW while operating.
You have time to mix up a rum punch while making QSOs.
It doesn’t matter if you slur your speech a bit due to that extra rum punch.
If the run rate is really slow, the pc screensaver will kick in to entertain you.
You can actually make contacts when propagation sucks.

SOTA News: Joyce/K0JJW Is Half A Goat

Posted on 13 February 2019 by Bob K0NR — 3 Comments ↓

Recently, my SOTA Activating Partner and Spousal Unit Joyce/K0JJW racked up more than 500 activating points for Summits On The Air (SOTA). This is halfway towards the coveted Mountain Goat award, so naturally this is referred to as Half Mountain Goat. Steve/WG0AT noticed this achievement and created this certificate for her.

She has activated 108 summits in 13 different associations (including HB Switzerland). All radio contacts have been on the VHF/UHF bands. She really likes it when another woman gets on the air with her, which she calls F2F (Female-to-Female) radio contact.

Congratulations, Joyce!

73 Bob K0NR

The Myth of VHF Line-Of-Sight

Posted on 8 February 2019 by Bob K0NR — 4 Comments ↓

When we teach our Technician License class, we normally differentiate between HF and VHF propagation by saying that HF often exhibits skywave propagation but VHF is normally line-of-sight. For the beginner to ham radio, this is a reasonable model for understanding the basics of radio propagation. As George E. P. Box said, “All models are wrong, but some are useful.”

In recent years, I’ve come to realize the limitations of this model and how it causes radio hams to miss out on what’s possible on the VHF and higher bands.

Exotic Propagation Modes

First, let me acknowledge and set aside some of the more exotic propagation modes used on the VHF and higher bands. Sporadic-e propagation allows long distance communication by refracting signals off the e-layer of the ionosphere. This is very common on the 6-meter band and less so on the 2-meter band. I like to think of this as the VHF bands trying to imitate HF. Tropospheric ducting supports long distance VHF communication when ducts form between air masses of different temperatures and humidities. Auroral propagation reflects the radio signal off the auroral ionization that sometimes occurs in the polar regions. Meteor scatter reflects signals off the ionizing trail of meteors entering the earth’s atmosphere. Earth-Moon-Earth (EME) operation bounces VHF and UHF signals off the moon to communicate with other locations on earth. These are all interesting and useful propagation mechanisms for VHF and higher but not the focus of this article.

Improved Line-of-Sight Model

Now let’s take a look at more “normal” VHF propagation that occurs on a daily basis, starting with the simple line-of-sight propagation model. The usual description of line-of-sight VHF is that the radio waves travel a bit further than the optical horizon (say 15% more) . Let’s refer to this as the Line-of-Sight (LOS) region where signals are usually direct and strong. What is often overlooked is that beyond the radio horizon, these signals continue to propagate but with reduced signal level. Let’s call this the Non-Line-of-Sight (NLOS) region. The key point is that the radio waves do not abruptly stop at the edge of the LOS region…they keep going into the NLOS region but with reduced signal strength. Now I will admit that this is still a rather simplistic model. Perhaps too simplistic. I’m sure we could use computer modeling to be more descriptive and precise, but this model will be good enough for this article. All models are wrong, but some are useful.

WORKING the LOS and NLOS Regions

Let’s apply the model for Summits On The Air (SOTA) VHF activations. If we are only interested in working the LOS region, we won’t need much of a radio. Even a handheld transceiver with a rubber duck antenna can probably make contacts in the LOS region. It’s still worth upgrading the rubber duck antenna to something that actually radiates to improve our signal (such as a half-wave antenna). We may pick up some radio contacts in the NLOS region as well but our success will be limited.

To improve our results in the NLOS zone, we need to increase our signal strength. We are working on the margin, so every additional dB can make enough difference to go from “no contact” to “in the log.” Think about another radio operator sitting in the NLOS zone but not quite able to hear your signal. Your signal is just a bit too weak and is just below the noise floor of the operator’s receiver. Now imagine that you improve your signal strength by 3 dB, which is just enough to get above the noise and be a readable signal. You’ve just gone from “not readable” to “just readable” with only a few dB improvement.

What can we do to improve our signal levels? The first thing to try is improving the antenna, which helps you on both transmit and receive. I already mentioned the need to ditch the rubber duck on your HT. My measurements indicate that a half-wave vertical is about 8 dB better than a typical rubber duck. This is only an estimate…performance of rubber duck antennas vary greatly. A small yagi (3-element Arrow II yagi) can add another 6 dB improvement over the half-wave antenna, which means a yagi has about a 14 dB advantage over a rubber duck.

On the other hand, if you believe that your VHF radio is only Line-of-Sight, then there is no reason to work on increasing its signal level. The radio wave is going to travel to anything within the radio horizon and then it will magically stop. This is the myth that we need to break.

More Power

When doing SOTA activations, I noticed that I was able to hear some stations quite well but they were having trouble hearing me. Now why would this be? Over time, I started to realize these stations were typically home or mobile stations running 40 or 50 watts of output. This created an imbalance between the radiated signal from my 5 watt handheld and their 50 watts. In decibels, this difference is 10 dB. Within the LOS region, this probably is not going to matter because signals are strong anyway. But when trying to make more distant radio contracts into the NLOS zone, it definitely makes a difference. So I traded my HT for a mini-mobile transceiver running 25 watts. See the complete story in More Power for VHF SOTA.

Weak Signal VHF

Of course, this is nothing new for serious weak-signal VHF enthusiasts. They operate in the NLOS region all of the time, squeezing out distance QSOs using CW, SSB and the WSJT modes. They generally use large directional antennas, low noise preamps and RF power amplifiers to improve their station’s performance. They know that a dB here and a dB there adds up to bigger signals, longer distances and more radio contacts. A well-equipped weak-signal VHF station in “flatland geography” can work over 250 miles on a regular basis…no exotic propagation required.

Now you might think that FM behaves differently, because of the threshold effect. When FM signals get weak, they fade into the noise quickly…a rather steep cliff compared to SSB which fades linearly. FM has poor weak-signal performance AND it fades quickly with decreasing signal strength. This is why it is not the favored modulation for serious VHF work. But the same principle applies: if we can boost our signal strength by a few dB, it can make the difference between making the radio contact or not.

So VHF is not limited to line-of-sight propagation…the signals go much further. But they do tend to be weak in signal strength so we need to optimize everything under our control to maximize our range.

73, Bob K0NR

ARRL CEO Howard/WB2ITX Speaks

Posted on 24 January 2019 by Bob K0NR — 5 Comments ↓

The new CEO of the ARRL, Howard Michel /WB2ITX spoke at the Ham Radio University event on January 5, 2019. The video below is worth watching to hear Howard’s thoughts on the role of the ARRL. The first 26 minutes are good, but the Q&A session that follows suffers from no audio coverage of the audience.

HRU keynote speaker 1-5-2019 from autocrime1 on Vimeo.

I think Howard has a tough job ahead of him, leading the ARRL through the start of its Second Century, including some long overdue reinvention. He stated that the ARRL has three roles that must remain in balance: A Membership Association, a Business and a 501c3 Charity. This is an important point that not everyone understands.

Howard also talked about the need for a three-way partnership between ARRL members, local clubs and ARRL staff. This partnership is currently weak and needs an overhaul. Lots of opportunity to improve here and tap into the power of volunteer members and clubs.

The slide below shows the lack of success in attracting new hams to become ARRL members. Howard said “something is wrong with the value proposition.”

The ARRL is not attracting enough new hams into ARRL membership.

This next slide drives the point home that the makeup of ARRL members is very different than the general ham population. The slide is hard to see in my graphic but ARRL members are mostly Extra class and General Class licensees and only a small slice of Technicians. The non-members are dominated by Technician licensees. In some ways, this shouldn’t be a surprise…you’d expect ARRL members to more active in the hobby with a tendency toward obtaining higher class licenses. I don’t recall ever seeing this data before.

ARRL members predominantly hold Extra class licenses, non-members are predominantly Technicians.

Howard talked briefly about some work that is being done to analyze the “Spectrum of Hams.” This seems like a clumsy name to me, but it’s really just classic market segmentation work aimed at understanding groups of users. You clump together users or customers that have similar needs so you can do a better job of serving them. Done correctly, this is important and fundamental work required to enable a customer-driven strategy. OK, I said customer driven, in the ARRL context I should probably say member driven. Same idea. Very important and very fundamental.

Now, the resulting model may be wrong. Someone once said: All models are wrong, some are useful. You build this kind of model, test it, fix it, make it better. Sometimes the insight you get doing the work is actually more important than the model produced. I believe the ARRL has been missing this kind of strategic analysis.

I am quite encouraged about what Howard is saying. I think he is poking in the right areas and applying the right set of tools. This will be difficult change management for the ARRL, so I don’t expect it will come easy or quickly. But it’s a start.

What do you think?

73 Bob K0NR

Genesee Mountain: SOTA and VHF Contest

Posted on 21 January 2019 by Bob K0NR — 3 Comments ↓

Bob/K0NR operating from the summit of Genesee Mountain (W0C/FR-194)

For the ARRL January VHF contest, I did a combination Summits On The Air (SOTA) and contest entry. I am recovering from a knee injury so Genesee Mountain (W0C/FR-194) turned out to be a nice easy hike for me. Of course, Joyce/K0JJW joined me and also did a SOTA activation. Caleb/W4XEN came along with us and activated the summit for SOTA using the HF bands. Finally, Brad/WA6MM showed up on the summit for a social visit.

Hiking route to Genesee Mountain from lower parking area.

To get to the Genesee Mountain, go west on I-70 from Denver, take Exit 254 to the south. Turn right onto Genesee Mountain Road and head into Genesee Mountain Park. There is an extensive trail system in the park and several different ways to reach the summit of Genesee Mountain. In fact, if the gate is open, you can drive right to the summit. The route we took starts at a parking area that is always open. With only a 0.7 mile hike (300 feet vertical), this is an easy and highly-recommended trail.

Leaving the parking area going uphill, we soon encountered the Genesee Mountain Trail which we followed to the left. Later we transitioned to the Genesee Summit Trail, which goes to the summit. Both of these are well marked but you need to make sure you catch the “summit” trail.

This sign clearly marks the route to the summit trail

We took more than the usual set of equipment for this activation so that we could cover the 6m, 2m, 1.25m and 70cm bands. For FM, we set up a Yaesu FT-90 2m/70cm transceiver with a ladder-line J-pole hanging from a rope in a tree. This omnidirectional antenna does not have any gain but I figured that for FM it would be most efficient to not mess with having to point a yagi antenna. For 2m and 70cm ssb/cw, I used a Yaesu FT-817 driving an Arrow II dualband antenna. The FT-817 also handled the 6m band, driving an end-fed half-wave wire antenna supported by a fishing pole (HF SOTA style). For the 1.25m band, I just used an Alinco handheld radio.

Caleb/W4XEN operating the HF bands for SOTA. Note the use of the SOTA flag to obtain an extra 2 dB of signal.

Genesee Mountain is a popular SOTA summit because it is so easy to access but still provides a good outdoor experience. We encountered a dozen of so hikers and mountainbikers on the summit and it can be very busy during a summer weekend. The summit is wide and flat with plenty of room to set up a portable station. For VHF, it has an excellent radio horizon to the front range cities.

Brad/WA6MM and Joyce/K0JJW on the summit.

Joyce made 14 contacts on 2m and 70cm FM. I made 52 QSOs, as shown in the table below. SSB activity was relatively light considering it was a VHF contest weekend. I was pleased to work Jay/W9RM in DM58 on 2m SSB at a distance of 167 miles. W9RM is on the other end of the state with many mountains blocking the path. I also worked Jim/WD0BQM in Mitchell, NE (DN81) on 2m CW, at a distance of 175 miles. VHF is not limited to line of sight!

    Band   Mode  QSOs     Pts  Grd  
      50  USB      5       5    2   
     144  CW       1       1    1   
     144  FM      19      19    2   
     144  USB      7       7    2   
     222  FM       3       3    1   
     432  FM      15      30    2   
     432  USB      2       4    1   
   Total          52      69   11   
        Score : 759

We had a great day on the summit, operating for just under 4 hours (with lots of breaks along the way). Thanks to Caleb/W4XEN and Brad/WA6MM for joining the fun. If you are looking for your first or an easy SOTA activation, give Genesee a try.

73 Bob K0NR

2019 Technician License Class

Posted on 3 January 2019 by Bob K0NR — No Comments ↓

Black Forest, Colorado; Sat March 16 and 23; 8 AM to 5 PM

Black Forest Fire Station, intersection Burgess Rd. & Teachout Rd.

The Technician license is your gateway to the world-wide excitement of Amateur Radio, and the very best emergency communications capability available!

• Earn your ham radio Technician class radio privileges
• Pass your FCC amateur radio license exam right in class on the second day
• Multiple-choice exam, No Morse Code Required
• Live equipment demonstrations
• Learn to operate on the ham bands, 10 Meters and higher
• Learn to use the many VHF/UHF FM repeaters in Colorado
• Find out how to participate in emergency communications

Registration fee: $30 adults, $20 under age 18

In addition, students must have the required study guide: HamRadioSchool.com Technician License Course Third Edition, effective 2018 – 2022, $22.95 print, $19.99 Kindle

Advance registration is required (No later than two weeks before the first session, earlier is better, first-come sign up basis until class is full.) To register for the class, contact: Bob Witte KØNR Email: bob@k0nr.com or Phone: 719/659-3727

Sponsored by the Tri-Lakes Monument Radio Association For more information on amateur (ham) radio visit www.arrl.org

Ham Radio, Chess and Model Railroading

Posted on 20 December 2018 by Bob K0NR — 2 Comments ↓

Every once in a while, I look at the number of licensed radio amateurs in the US and ponder how ham radio participation rates compare with other hobby activities. Take a look at this post from 2005: Some Amateur Radio Statistics and this one from 2015: Ten Year Trends in US Ham Licenses.

The latest number of FCC amateur radio licenses (March 2018, from ah0a.org) is 749,711 (Novice: 8847; Technician: 379,735; General: 174,478; Advanced: 41,153; Extra: 145,498)

The population of the United States (2018 estimate) is 325 million which means that FCC amateur radio licensees are 0.2% of the US population. (Yes, this number surely overstates the number of active radio hams.) From the 2017 Annual Report, ARRL membership is 159,070, which is a decline of 3% from the previous year, apparently associated with a recent dues increase. There is a slight time skew in the numbers but this means that ARRL membership is ~21% of the FCC licensees. This represents about a 2 point decline from the same calculation for 2005. Not a good trend.

It is interesting and maybe even useful to compare these numbers to other activities we are familiar with in the US.

Fishing

I stumbled across an in-depth analysis of sportfishing (basically all kinds of recreational fishing) by the American Sportfishing Association. This report on US Angler Participation (dead link: https://asafishing.org) says that 49 million people in the US participate in fishing, or 15% of the US population. Frankly, that number seems a bit high but let’s just go with it. Perhaps what’s more interesting is their analysis of renewal rates for fishing licenses and potential reasons for why people start and stop fishing. Oh, guess what? Young people are not pursuing fishing at the same rate as adults so there is concern about the future of the sport. Browse through the website and you will find reasonably good data on the state of fishing in the US.

Outdoor Sports

The Outdoor Industry Association publishes data on a wide variety of sports ranging from bicycling to birdwatching. According to their numbers, every activity they track has a larger percent of the US population than the FCC amateur radio license number. A very popular outdoor activity is bicycling, with a participation rate of 24%. Other significant sports listed include camping (21%), running (21%), hunting (6%) and downhill skiing (4%). Even birdwatching comes in at 3% and snowshoeing is listed as 1%. This report also analyzes participation rates, motivations and trends by race, age and other factors. Good stuff.

Chess

I came across a web page that asks the question “how many people play chess?” This caught my eye because I think there are significant similarities between the game of chess and amateur radio. The answer: no one knows.

One study claims that 15% of the US population plays chess at least once per year. This would be close to 50 million players and put it in the same participation class as camping or bicycling. That just seems too high…I can name quite a few of my friends and family that camp and bike. I can’t name hardly any that play chess regularly.

The US Chess Federation has 85,000 members, who are presumably actively involved in chess (for the most part). There are probably many times more people that play chess casually. A wild and generous guess of 10 times or 850,000 players would still only be 0.26% of the US population.

The chess community has many effective programs to help children get started in the game. This is probably a real strength for that community. However, I noticed several discussions in online forums lamenting the fact that children tend to drop the game in their teen years. Also, Sports Illustrated just published an article about how chess has always been dominated by men with women making limited gains in participation.

Model Railroading

Then someone on reddit asked why ham radio magazines have disappeared but model railroading magazines are quite available at the local bookstore. Now that is an interesting comparison. Model railroading is a well-established hobby that many people pursue for enjoyment. It is a bit “old school” with a strong hands-on “maker” aspect to it. It has also has seen the impact of newer technology, especially digital electronics. In terms of alternative activities, it is seeing competition from radio-controlled cars and aircraft.

This online forum puts the number of US model train hobbyists in the range of 150,000 to 300,000, but without much in the way of hard numbers (just anecdotal evidence). One person argued that the number is more like 1 million hobbyists. This web site makes the claim (without references):

Today there are a half million model railroaders and toy train hobbyists in the US and Canada!

But many model railroaders see challenges ahead. This Wall Street Journal article discusses how the demographics of the railroader population are changing: End of the Line for Model Trains? Aging Hobbyists Trundle On

This web site also discusses the trends in model railroading. I found this quote to be relevant:

This hobby (as well as a lot of other markets) is currently dominated by the baby boom generation. They will be dwindling in numbers over the next ten years, and the generations behind them just don’t have the numbers to fill in unless there is a significant boom of interest in model trains.

One commenter suggests there are 1 million model railroaders in the US.

Analysis

First, I am struck by the number of different hobby and sports activities available to us. From a historical perspective, North Americans have significant leisure time and a multitude of activities to choose from. Some of those are “mainstream” in the sense that most people are aware of them and many people do them (examples: fishing, bicycling, running). Other activities fall into a niche (< 1% of the US population) but still have vibrant communities that pursue them with gusto (examples: chess, amateur radio, model railroading). The participation rate for Chess may actually be higher than 1% of the population…I’m really not sure…but it looks more like a niche activity than a mainstream hobby.

The mainstream activities tend to have access to good data on participation in the sport or hobby while the niche activities tend to be lacking reliable data. It seems that the more popular activities have a industry association or member organization with sufficient resources to pursue obtaining participation data and maintaining it over time. The information available concerning sportfishing and outdoor activities was pretty impressive. Chess, amateur radio and model railroading…not so much. If you are worried about the health of a hobby or sport, the first step is to have accurate data. (I recently heard that ARRL Headquarters is pursuing this. I certainly hope so.)

Participants in many of these activities express concern about the demographics of their communities. There are lots of comments on web sites about needing to attract younger participants for the future of the hobby, along with comments about how kids don’t seem to be interested. The big concern was getting kids involved but there are also issues of low participation by women. Certainly, we hear these same concerns in the amateur radio community.

One big takeaway is that amateur radio is not the only community that is concerned about growth. I’d really like to hear from radio amateurs that are active in chess and model railroading, to compare and contrast their experiences.

73 Bob K0NR

The Three Laws of Electronic Measurement

Posted on 17 December 2018 by Bob K0NR — 4 Comments ↓

On Saturday, I had the privilege of talking to a group of radio amateurs on the topic of electronic measurements. I opened the session with a short discussion of “why do we even need electronic measurements?” This was captured in three “laws” listed below:

Bob’s First Law of Electronic Measurement

With electricity, most of the time we cannot observe what is going on without measuring instruments.

Bob’s Second Law of Electronic Measurement

When we can observe electricity directly, it is often a bad thing.

Bob’s Third Law of Electronic Measurement

Lord Kelvin was right

RMHam University – Test and Measurement

Posted on 10 December 2018 by Bob K0NR — No Comments ↓

The Rocky Mountain Ham Radio group offers an educational series they call RMHAM University. I am honored to be able to present on the topic of Practical Ham Radio Measurements on Saturday morning Dec 15th.

As many of you know, this topic is an intersection of my hobby of amateur radio and 40 years working in the electronic test and measurement industry. I’ve written two books on the electronic measurement and enjoy talking about it.

Here’s the agenda for the class.

Topic	Comments	Time
1. Introduction	Measurement Concepts, trends in test and measurement	8:00 to 8:30
2. Digital Multimeters	Voltage, current and resistance measurements	8:30 to 9:20
Break
3. SWR Measurement	SWR, reflection coefficient, SWR measurements, antenna analyzers, vector network analyzers	9:30 to 10:20
Break
4. Oscilloscope measurements	Time domain, bandwidth, scope probes	10:30 to 11:00
5. RF Measurements	Frequency domain, spectrum analyzers, SDR receiver, transceiver tests, power measurement	11:00 to 11:30
Discussion and wrap up		11:30 to noon

Location and Registration

Cherry Creek School District Educational Services Center
4700 S. Yosemite St.
Greenwood Village, CO 80111

Please register with the RMHAM web site so we know how many to plan for. There is no charge for the class.
https://www.rmham.org/wordpress/rmham-university-2018/

Here are my slides in pdf format:
Practical Amateur Radio Measurements

If you need the original powerpoint slides, send me an email.

73 Bob K0NR

Winter SOTA on Devils Head (W0C/FR-051)

Posted on 27 November 2018 by Bob K0NR — No Comments ↓

One of our favorite summit hikes along the front range of Colorado is Devils Head lookout tower (W0C/FR-051). This hike is about 1.5 miles one way with 900 feet of vertical gain. See my summer trip report from July 2012 for more information on the hike. This year we activated the summit in winter.

Devils Head Fire Lookout Sign — The sign at the bottom of the steps leading to the fire lookout.

One problem with this trail is that it has become extremely popular in the summer months. The actual summit and lookout tower is not very big and can get very crowded. This is tolerable for hiking but can make a Summits On The Air (SOTA) activation difficult. It certainly is not a “get away from it all” experience.

Bob and Joyce on the trail — Joyce/K0JJW and Bob/K0NR on the trail to Devils Head.

Recently, Brad/WA6MM pointed out that the summit is still accessible now (in late November) and the crowds have all disappeared. Note that the trailhead will be difficult to access starting December 1st (see the Devils Head forest service page).

Devils Head trail in winter — Typical trail conditions for our hike.

We took highway 67 out of Sedalia, then south on Rampart Range Road (FS 300) to the well-marked side road that goes to the trailhead . The forest service roads had 6 to 8 inches of snow on them but we were able to drive our 4WD pickup truck to the trailhead without any problem. The trail was also snow covered but walking in high-top hiking boots worked just fine. We had our microspikes along in case of ice but did not use them.

Devils Head Lookout — View of the Devils Head lookout tower in winter.

As you can see from the photos, it was a bright sunny day…wonderful day to be out hiking in the mountains. Temperature was about 25 degrees F but very light wind.

view from Devils Head — View to the east from the summit of Devils Head.

We met a total of four other parties on the trail, so not very busy.

Once on top, we started calling on 146.52 MHz with many stations responding. That summit has good line-of-sight to Denver and the other front range cities. As things quieted down on 2 meters, I switched to 446.0 MHz and worked a bunch of stations there, too. We were using the small TYT 2m/70cm mobile transceiver (which I recently repaired) and yagi antennas for 2m and 70cm. I also had my 23cm HT and Comet yagi with me and managed to work Paul/W0RW on 1294.5 MHz, about 33 miles (53 km) away in Colorado Springs.

Here is my log from the activation:

Joyce worked a subset of these stations. In particular, she was very happy to work three women. She has been referring to these contacts as “F2F” for “female to female.” On this activation, her F2F QSOs were: Annette/KA0JKZ, Sharon/KC0PBR and Barbara/W0BJE. Way to go, ladies!

1.2 GHz yagi antenna — Bob/K0NR holding the 1.2 GHz Comet yagi antenna.

We’ve made a note to do this summit again next year, after the crowds are gone. It is a really nice early winter hike. Thanks to everyone that worked us on the summit.

73 Bob K0NR

My SOTA Battery Journey

Posted on 24 November 2018 by Bob K0NR — 6 Comments ↓

Batteries are a necessity for portable operation, including Summits On The Air (SOTA) activations. In situations where I’m using a handheld transceiver, it has its own battery. I might carry a spare battery or two, depending on how long I intend to operate.

I also make use of my Yaesu FT-817 (mostly for 2m ssb/cw) and a small 2m/70cm FM transceiver (Yaesu FT-90). The FT-817 has an internal battery pack but I worry that it will run out of charge during the activation. The FT-90 needs a battery to function, drawing 9.5 A at full power. However, I usually run it at a lower power setting, probably drawing about 5 or 6 A.

Sealed Lead Acid Battery

I started out using a small sealed lead acid (SLA) battery. These use well-established battery technology that has stood the test of time. They are easy to charge and do a good job. But they are a bit heavy. Initially, I thought “what’s an extra pound or two in my backpack?” Later, I started looking around for something more compact and lighter. As backpackers and SOTA activators know, a pound here and a pound there means you up end up with a really heavy backpack.

Lithium Iron Phosphate Battery

RC airplane battery — Lithium Iron Phosphate batteries are compact and lightweight.

Many SOTA activators use lithium iron phosphate (LiFePo4) batteries that are commonly used for radio-controlled aircraft/vehicles. I bought two of these batteries (Zippy 4200) and a special charger that handles LiFePo4. These batteries are lightweight and have great power density. One charge handled several SOTA activations…I never ran out of power.

Battery wire connections — Two battery connections for LiFePo4: the charging connection that accesses each cell and the output connection that goes to the radio.

As shown in the photo, these battery packs have two connections: one for charging that accesses each cell individually and one for current output that you connect to your radio. I removed the output connectors that came installed and replaced them with PowerPole connectors.

These batteries worked pretty well for me. They had plenty of capacity and held their voltage nicely during discharge. Then one of the batteries failed early in life. (I think I was taking good care of them, too.) One annoying thing with these batteries is that the charger was relatively large and had a fragile adapter that connected to the battery charging port. (This allows one charger to handle a wide variety of battery packs.) This was not a problem at home but I found it to be a disadvantage when traveling.

Bioenno Power 12 Volt Series

When the Zippy battery failed, it caused me to look further for other options. I ended up adopting the Bioenno series of batteries, specifically their 12V series: 12V Series – LFP (LiFePO4) Batteries. These battery packs also use LiFePO4 cells, but the charging controller smarts are embedded into the battery pack. These packs also have short circuit protection which is an awesome safety feature for lithium batteries. This makes the battery pack friendlier to use but it does cost a bit more. They also come with PowerPole connectors installed (along with another connection for the charger).

From the Bioenno web site:

Our 12V LFP Lithium Iron Phosphate batteries give you the following advantages:

We guarantee our entire battery range comes with built-in protection-circuit-modules (PCM) micro-computers that internally balanced cells and confer protection including from overcharge, overdischarge and short circuiting.
A Bioenno Power battery is thermally and chemically stable
A Bioenno Power battery is dependable and reliable without the possibility of lithium fires
A Bioenno Power battery is 50% to 70% lighter than a traditional SLA (sealed lead acid) battery
A Bioenno Power battery allows for extraction of >80-90% of the rated capacity, whereas an SLA battery only allows for 50% of the rated capacity
A Bioenno Power product has a service life of 2000+ charge cycles at 5-10+ years with a shelf life that far exceeds the service life of many other batteries

Bioenno Power Battery — Bioenno 4.5 Ah battery pack.

I bought two of their battery packs. The 4.5 Ah pack is for normal SOTA use, small and lightweight (1 pound). The second pack is 9 Ah for when I’m operating for a longer time (weighs 2.6 pounds), such as mountaintopping for a VHF contest. The Bienno 2A charger, which has a nice compact form factor, works with both of them. This charger is much better for packing up when traveling.

Bioenno Power Battery Charger — The Bioenno 2A charger works with both battery packs.

I have used the Bioenno batteries on several SOTA activations and I’m quite happy with the setup. The Zippy LiFePO4 (and Sealed Lead Acid) are fine to use but I have found that the Bioenno system is superior overall. I will probably add a few more Bioenno battery packs to my collection over time. They make some really large batteries that would be good for EmComm work, but too heavy for hiking.

That’s my story on battery packs. What are you using?

73 Bob K0NR