APRS Archives - The KØNR Radio Site

Which Modes Have You Operated?

Posted on 9 October 2024 by Bob K0NR — 7 Comments ↓

For our local 2m net, the Net Control Station asks a Question of the Night to stimulate some discussion. Recently, the question was:

Do you have any interest in CW. If yes, Do you currently operate CW or do you plan to learn? If you have no interest in CW, what other modes besides voice do you operate on or would like to?

I am not a huge CW fan, but I do use it from time to time, especially when it comes to squeezing out difficult contacts on VHF or UHF. However, this question had me thinking about the various modes I have operated, so I made a list:

SSB - quite often on HF, VHF, UHF
CW  - not nearly as often but on HF, VHF, UHF
FM/PM - lots of VHF activity here, 2m FM is the Utility Mode
AM  - a few times, just to check it out
RTTY - I used to do this often but my interest has faded
PSK31 - I used to do this often but my interest has faded
FT8 - this one has taken over my digital operating
FT4 - a faster alternative to FT8, often better to use
Q65 - I just started using this for weak-signal VHF/UHF
MSK144 - for meteor scatter, but I haven't done that for a while
AX.25 - VHF packet radio, including APRS
DMR - the most common digital mode in Colorado
D-STAR - I used D-STAR when it first came out but lost interest
C4FM - Yaesu Fusion, I've used it a few times

Each one of these modes has a story behind it…often I was just looking for something new to try. (If you find yourself getting bored with ham radio, it might be time to try a new mode.)

This list also reminds me that I need to get back to chasing grids on the 2-meter band, using CW, SSB, FT8, MSK144, and Q65. I have a new tower up that I’ve not taken full advantage of for VHF/UHF.

That’s my list of modes used, what does your list look like?

73 Bob K0NR

The 2 Meter Band: Much More Than FM

Posted on 8 February 2021 by Bob K0NR — No Comments ↓

Way back in the Wayback machine, when I was working on getting my Technician license (in the 20th century), I recall looking at the frequency bands available to Techs. Technicians had operating privileges for everything above 50 MHz, which looked like a lot of useful spectrum to me. The idea at the time was that Technicians were exploring the new frontier of amazingly high frequencies. Since then, the Technician license has morphed to be the entry level license.

ICOM has a good graphic that shows all of the ham bands and shows the common subbands for various modes. I snipped out the portion that covers the most popular VHF/UHF bands (below). Wow, look at all the stuff you can do! Note that the 2m band offers 4 MHz of spectrum, big enough to fit eleven 20 meter bands inside it. (Yeah, yeah, the propagation is a lot different.)Speaking of bandwidth, take a look at the 70 cm band, with 30 MHz of spectrum. (Not shown is the 23 cm band, which spans 60 MHz.) The higher you go in frequency, the more spectrum there is.

Most people think of the 2-meter band as just FM and repeaters, but it is much more than that. I copied the 2-meter band graphic and added my own notatation on the various uses of the band.

Much of the band is allocated to FM, which is consistent with the popularity of the mode. I didn’t mark all of the FM segments, so refer to the color coding to see them. But there is much more than FM simplex and repeaters. Down on the low end is the CW-only segment and EME activity (Earth-Moon-Earth or moonbounce). The “weak-signal” enthusiasts tend to use the SSB portion, with the SSB calling frequency of 144.200 MHz (Upper Sideband). You may also hear CW in the SSB subband because radio hams flip back and forth between the modes depending on propagation. Meteor scatter is mostly done via the WSJT-X mode of MSK144 around 144.140 MHz. I forgot to include FT8 on the first posting but I have since added it in, around 144.174 MHz. FT8 is not that common on 2 meters but I have made a few contacts with it.

Automatic Packet Reported System (APRS) activity is on 144.390 MHz, using FM-based 1200-baud packet radios. Other packet radio usage is not shown but is usually around 145.01 MHz. The 2m band is very attractive for satellite use, with VHF propagation properties and manageable doppler shift for Low Earth Orbit (LEO) satellites. The downlink from the International Space Station (ISS) is usually 145.80 MHz.

Over time, I’ve used all of these 2m modes mentioned above, with the exception of EME. I am still working on that one and I hope to have a new 2m Yagi installed sometime this year that will enable it.

73 Bob K0NR

Yaesu FT-1DR: A Trail Friendly SOTA HT

Posted on 24 March 2016 by Bob K0NR — 11 Comments ↓

A common topic in the QRP community is the Trail Friendly Radio (TFR) concept for backpack-style operating on the high-frequency bands. I’ve adapted the concept for the VHF/UHF bands, calling it the VHF Trail Friendly Radio (VTFR).

Strong candidates for the best VTFR include the Elecraft KX3 (with 2m option) and the Yaesu FT-817. Heck, both of these radios deliver all of the HF bands, 6m and 2m in one portable package. (The FT-817 also has 70cm.) See my blog post that compares the two rigs.

But the other set of strong contenders for the best VTFR is one of the many dualband HTs available on the market. It is hard to beat the compact, portable attributes of these great little radios for casual use on the trail. I’m not going to review them all but instead talk about my current favorite: the Yaesu FT-1DR. (Yaesu has recently replaced the FT-1DR with the newer model FT1XDR, which is the same design but with an improved GPS receiver and larger battery pack.)

My main usage of the radio is when hiking and doing Summits On The Air (SOTA) activations. This radio has a lot to offer in terms of capability and features, but the main things that stand out are 2m/70cm band coverage, two independent receivers and built-in GPS/APRS capability. Most SOTA VHF operating is on 2m fm so that band is critical, but I also make contacts on 70cm. More important is that together 2m and 70cm covers that vast majority of fm repeaters in my state, providing the best backcountry repeater coverage. The built-in APRS features allow the HT to be an effective tracking device as I move down the trail. SOTA chasers can see my position in real-time and anticipate when I’ll be on the summit. The radio has two separate receivers which turns out to be very useful when on the trail. With two receivers, I can monitor 146.52 MHz (2m fm calling frequency, often used for SOTA) while also keeping an ear on a local 2m or 70cm repeater. Another configuration is using one side of the radio to ping my location via APRS while the other side monitors 146.52 MHz.

The extended receive capability of the radio opens up lots of listening options: AM broadcast, FM broadcast, airband, shortwave and NOAA weather radio. I don’t use these very often but there are times that I want to tune to weather or news.

I am not a huge fan of Yaesu’s C4FM digital mode but do use it on occasion. The DN (digital narrow) mode supports voice and position information simultaneously, so Joyce KØJJW and have been using it to keep track of each other on the trail. The radio provides a basic indication of distance and direction to another C4FM radio.

A few other tips: if you buy an FT-1DR, I recommend upgrading the belt clip to the BC-102 clip from Batteries America. It is way better than the standard one from Yaesu. Michael KX6A created a very handy quick reference card for operating the FT-1D, so consider putting one in your pack.

73, Bob KØNR

Winter SOTA Activation of Kaufman Ridge North

Posted on 12 March 2016 by Bob K0NR — 3 Comments ↓

Today, Joyce KØJJW and I activated Kaufman Ridge North (W0C/SP-085) for Summits On The Air (SOTA). We’ve been on the summit before, including the first ever SOTA activation back in September of 2012. This summit is close to our cabin, so it made for a convenient hike. The mountain is not that difficult of a climb but we encountered quite a bit of snow in March, up to three feet in places, which we tromped across with snowshoes.

IMG_0720edit — Joyce K0JJW on snowshoes in typical trail conditions

My blog posting about the next mountain to the south, Kaufman Ridge HP (W0C/SP-081), outlines a good way to access both summits during the summer. However, a seasonal gate closure (December 1 to April 15) means we needed to find a different route. We approached the mountain from the north, parking our vehicle on Castle Court (a short side road off of Kaufman Road). We hiked an old ranch road that quickly crossed what appears to be private property (empty lot, no signs) to get to the US Forest Service boundary. Once we hopped the fence we were on public lands. We intentionally routed to the east to avoid some houses.

Snowshoe route shown to summit of Kaufman Ridge North. We parked at Castle Court, the unlabeled road that connects with Kaufman Road.

I don’t claim that this route is optimal. We had to break a lot of trail, pushing through the snow. We found a section of trail that had recent snowshoe traffic on it but it wasn’t of much use to us heading to the summit. We followed numerous game trails which appeared and disappeared on the side of the mountain. Mostly, we busted through the snow on our own. Surprisingly, the last quarter mile to the summit had little snow, so we removed our snowshoes at that point and just hiked in boots.

My Yaesu FT-1DR has become my favorite rig for SOTA activations. It covers both 2m and 70cm with dual-receiver capability. it has a built-in GPS receiver and APRS capability that facilitates easy APRS tracking. Joyce and I have a pair of these which we’ve been using to track each other’s positions on the few occasions we get separated on the trail.

Bob K0NR knocks out a few 2m fm contacts from the summit

After we made the summit, I made a few contacts on 146.52 MHz. Thanks to Jim KDØMRC, Dave KØHTX, Carl K5UK and Candy KEØDMT for giving me my four required SOTA contacts.

The weather turned out to be better than predicted…partly cloudy and temps around 50 degrees F. On the way back down, we retraced our ascent path so we had more of a snowshoe trail to follow. I have to admit that this trip was a good lesson in how off-trail snowshoeing can really be a challenge. This was many times more difficult than a summer trail hike of equal length and elevation gain. Trip stats: 2.6 total miles, 1300 vertical feet.

At least, that’s my story and I’m sticking to it.

73, Bob K0NR

Two SOTA Activations: W0C/SP-099 and SP-115

Posted on 11 August 2013 by Bob K0NR — No Comments ↓

Lately, I have been focusing on activating the SOTA (Summits On The Air) peaks near our cabin in the mountains. The basic idea is to identify a SOTA summit, hike to the top and make a few contacts on VHF. On Friday, my spousal unit (Joyce, K0JJW) and I decided to head out to an unnamed peak (W0C/SP-099), southeast of Buena Vista, CO. By no coincidence, this summit had not been activated yet, so we’d get the esteemed honor and glory of being the first.

For lesser known summits, a bit of research is required to figure out the route. My first stop is to check the SOTA database for basic information on the summit. I’ll usually have to dig further using ListsOfJohn and SummitPost. ListsOfJohn is an incredible database of topographical information, listing every summit along with information such as elevation, lat/lon, rise, etc. (The Colorado SOTA information was gleaned from ListsOfJohn.) SummitPost will usually have more detailed information on a summit but only for the more popular ones. The SOTA Mapping Project is another excellent resource with very useful interactive topo maps. And, of course, I also dig out the US Forest Service map for the area, which often gives the best view of access roads.

We drove the Jeep to within a mile of the summit and started hiking up. I posted our route information on ListsOfJohn, so take a look there for that information. The summit is unnamed, so it is referred to by its elevation: 10123. I had my Yaesu VX-8GR burping out APRS packets which were plotted on aprs.fi when we reached the summit.

When we reached the summit, I spotted myself on the SOTAWatch web site using the SOTA Goat app on my smartphone. More importantly, the night before the hike, I sent an email to some of the radio amateurs that were likely to be within VHF range. That paid off and I worked Jim KD0MRC, Walt WZ0N and John K3NOQ on 146.52 MHz FM. Jim was hiking to Harvard Lakes above 10,000 feet, so it was special to be able to contact him on the trail. A little later, I caught KV4AL who was mobile near the top of Mount Evans. While only one contact is required to “activate” a summit, four contacts are needed to earn SOTA points, so I was happy to make these four QSOs. My gear was a Yaesu FT-60 driving a 3-element Arrow yagi antenna.

In addition, Joyce and I generally work each other on the SOTA the summit. The SOTA rules say that “QSOs with others within the same Activation Zone do not count towards the QSO total” which means that one of us needs to hike down a bit to get outside of the activation zone (75 feet vertical feet from the summit). We take turns doing this so that each of us activates the summit and makes a contact with the summit.

We took a round about path back to the Jeep and headed for Bald Mountain. At this point, we were both very tired and the thunderstorms were moving in. We decided to at least check out the access to Bald Mountain (WoC/SP-115) even if we didn’t climb it that day. It turns out that there is a 4WD road that goes to the top of the mountain, so we drove to the summit. The road is very rough in a few spots but the Jeep handled it nicely. At the top, we hiked back down a bit to meet the non-motorized ascent requirement for SOTA. We also did our “work each other” technique while on the mountain so that we each had a contact. I was not able to raise anyone on 146.52 MHz but I did catch Carl K5UK on the 146.745 MHz repeater and worked him on simplex. By this time, it was raining with lightning getting closer, so we abandoned the summit and headed back to the cabin.

Thanks to the guys that took the time to contact us on the two summits.

73, Bob K0NR

The Updated Incomplete List of Ham Radio iPhone Apps

Posted on 4 May 2013 by Bob K0NR — 5 Comments ↓

It is about time I updated one of my more popular posts, The Incomplete List of Ham Radio iPhone Apps from 2011. This was a challenging task back then and has gotten more difficult as the number of ham radio apps for the iPhone has greatly expanded. Still, I will give it a shot and appreciate your feedback to make the list better. I am only evaluating iPhone apps, not iPad apps, since I don’t use an iPad.

In general, I will focus on free or low cost (less than $5) apps that I am actively using.

From the Simple Utility Category:

Maidenhead Converter (Author: Donald Hays, Cost: Free) Handy app that displays your grid locator, uses maps and does lat/lon to grid locator conversions.

Ham Radio Handbook (Author: Antonis Miliarakis Cost: Free) This app provides some basic ham radio info: Q Signals, Country Prefixes, Band Plans and RST signal reporting.

UTC Time (Author: Michael Wells, Cost: Free) A simple app that displays UTC time and local time.

Ham I Am (Author: Storke Brothers, Cost: Free) A handy app that covers some basic amateur radio reference material (Phonetic alphabet, Q Signals, Ham Jargon, Morse Code, RST System, etc.) Although I find the name to be silly, I like the app!

There are quite a few good apps for looking up amateur radio callsigns.

CallBook (Author: Dog Park Software, Cost: $1.99) Simple ham radio callbook lookup with map display.

Call Sign Lookup (Author: Technivations, Cost: $0.99) Another simple ham radio callsign lookup with map display.

CallSigns (Author: David Fleming W4SMT, Cost: $1.99) This is my favorite ham radio callsign lookup. The features are not much different than the others I have listed but the graphics are nicer and the user interface a little cleaner. I am sure this is mostly personal preference.

There are a few repeater directory apps out there:

iHAM Repeater Database (Author: Garry Gerossie, Cost: $4.99) Geolocation repeater directory. This seems to work well.

RepeaterBook (Author: ZBM2 Software, Cost: Free) I’ve only used this one a bit but it seems to work well and its free.

If you are an EchoLink user, then you’ll want this app:

EchoLink (Author: Synergenics, Cost: Free) The EchoLink app for the iPhone.

There are quite a few APRS apps out there. I tend to use these as my needs are pretty simple….just track me, baby!

iBCNU (Author: Luceon, Cost: $1.99) The first APRS app I was able to get running. It just turned on and worked. It integrates the aprs.fi mapping into the app, so it is easy to use. I recommend this one for most casual APRS users.

Ham Tracker (Author: Kram, Cost: $2.99) APRS app, works OK, uses external maps such as Google and aprs.fi. “Share” feature allows you to send an SMS or email with your location information.

Satellite tracking is another useful app for a smartphone:

ISS Lite (Author: Craig Vosburgh, Cost: Free) A free satellite tracking app for just the International Space Station. It has annoying ads but its free.

ProSat Satellite Tracker (Author: Craig Vosburgh, Cost: $9.99) This app is by the same author as ISS Lite, but is the full-featured “pro” version. Although it is a pricey compared to other apps, I recommend it.

For Summits On The Air (SOTA) activity, there are a few apps:

Pocket SOTA (Author: Pignology, Cost: Free) A free app for finding SOTA summits, checking spots and accessing other information.

SOTA Goat (Author: Rockwell Schrock, Cost: $4.99) This is a great app for SOTA activity. It works better when offline than Pocket SOTA (which often happens when you are activating a summit).

For Technician License training, I like the HamRadioSchool.com app. (OK, I am biased here as I contribute to that web site.)

HamRadioSchool (Author: Peak Programming, Cost: $2.99) There are a lot of Technician practice exams out there but this is the best one, especially if you use the HamRadioSchool license book. They also just released the General practice exam, too.

For a mobile logbook:

HamLog (Author: Pignology, Cost: $0.99) I am not too keen on the idea of keeping a log on an iPhone, but it does come in handy once in a while. More importantly, HamLog includes a bunch of handy tools including UTC Clock, Callsign Lookup, Prefix list, Band Plans, Grid Calculator, Solar Data, SOTA Watch, Q Signals and much more.

Well, that’s my list. Any other suggestions?

This list is out of date – see my updated list of iPhone apps here

The Android HT

Posted on 27 October 2012 by Bob K0NR

I’ve been watching all of the innovative work going on in the smartphone and tablet arena and wondering how we could get more of that going in ham radio. To be sure, there are always radio amateurs developing creative technology. Some examples are adaptations of D-STAR, IRLP, improvements on APRS and sound card modulation modes. However, amateur radio is missing a standardized platform for handheld communications. Such a radio platform could open up lots of software innovation in this space.

What I have in mind is a dualband (2M/70cm) handheld transceiver that is built on top of the Android operating system. (Sorry Apple Fan Boys, iOS is a non-starter based on Apple’s walled garden philosophy.) This radio would have some of the hardware features we now take for granted in smartphones: GPS, WiFi, USB, maybe even a camera. I’d also include APRS hardware built-in, similar to the Yaesu VX-8GR or the Kenwood TH-D72A. I’ve hacked together a concept photo shown on the left of this post (click to enlarge). We would probably want to maintain some of the most important direct hardware controls such as PTT, volume and channel select. The rest of the user interface would be done via a touchscreen display, where the power of the Android OS comes into play.

While this hardware configuration is exciting, the real power comes from having a software developers kit (SDK) with a stable Application Programming Interface (API). This would unleash the creativity of all those software-oriented hams out there and a plethora of apps would emerge. There are plenty of ham radio apps available on the Apple and Android platforms…it’s just they are missing the radio as part of the package. An obvious area for innovation would initially be in APRS or maybe D-STAR. We could actually have the equivalent of SMS text messaging on ham radio, backed up via the WiFi connection. (Yeah, this kind of exists already but it is really cumbersome to use due to the ~~braindead~~ menu-driven user interfaces of current radios.) Just think how easy programming the radio would be with a touchscreen approach.

This is the type of product development that requires significant investment, but the technology is readily available. I suppose a garage shop operation could get this done but one of the big radio manufacturers could easily pull this off. Maybe one of those upstarts from China might want to take this on. Whoever does it, just send me $5 per unit and I’ll be happy :-).

That’s my best idea for this morning. What do you think?

73, Bob K0NR

The Incomplete List of Ham Radio iPhone Apps

Posted on 17 April 2011 by Bob K0NR

It was time to upgrade my Verizon Wireless phone, so I decided to move to a smartphone. After pondering whether to go with Android or Apple, I finally settled on the iPhone 4. I still miss the The Real Keyboard on my old LG EnV3, as it is nearly impossible to type on a shrunken touchscreen. But then there’s those apps…

I have been trying out some of the ham radio related applications on the iPhone, so I thought I’d report out what I have found.

Here are a few utilities that I found. These apps doing something relatively simple:

CallBook (Author: Dog Park Software, Cost: $1.99) Simple ham radio callbook lookup that accesses the WM7D database (or QRZ and Ham Call databases if you are a subscriber).

Maidenhead Converter (Author: Donald Hays, Cost: Free) Handy app that displays your grid locator, uses maps and does lat/lon to grid locator conversions.

Q Codes Reference (Author: fiddlemeragged, Cost: Free) This app displays the definition of the common Q Signals (QRZ, QSL, QTH, …)

UTC Time (Author: Michael Wells, Cost: Free) A simple app that displays UTC time and local time.

Sunspot (Author: Jeff Smith, Cost: Free) A simple app that displays solar data from WWV.

Ham I Am (Author: Storke Brothers, Cost: Free) A handy app that covers some basic amateur radio reference material (Phonetic alphabet, Q Signals, Ham Jargon, Morse Code, RST System, etc.) Although I find the name to be silly, I like the app!

There are a few repeater directory apps out there:

QSL.FM Mobile (Author: Robert Abraham, Cost: $2.99) Geolocation repeater directory and call sign lookup.

iHAM Repeater Database (Author: Garry Gerossie, Cost: $4.99) Geolocation repeater directory. This seems to work a lot better than the QSL.FM app.

If you are an EchoLink user, then you’ll want this app:

EchoLink (Author: Synergenics, Cost: Free) The EchoLink app for the iPhone.

There are quite a few APRS apps out there. I have tried these:

iBCNU (Author: Luceon, Cost: $1.99) The first APRS app I was able to get running. It just turned on and worked. It integrates the aprs.fi mapping into the app, so it is easy to use. I recommend this one for most casual APRS users.

OpenAPRS (Author: Gregory Carter, Cost: $3.99) This APRS app integrates into the openaprs.net server. A bit more complicated to set up but looks to be more flexible, too. You might want to check out openaprs.net before buying this app.

PocketPacket (Author: Koomasi, Cost: $4.99) another APRS app. Seems to work fine but I find the previous 2 apps more useful. Note: This app can function as a packet modem connected to a transceiver (no internet required).

Ham Tracker (Author: Kram, Cost: $2.99) APRS app, works OK, uses external maps such as Google and aprs.fi. “Share” feature allows you to send an SMS or email with your location information.

Satellite tracking is another useful app for a smartphone:

ISS Lite (Author: Craig Vosburgh, Cost: Free) A free satellite tracking app for just the International Space Station

ProSat Satellite Tracker (Author: Craig Vosburgh, Cost: $9.99) This app is by the same author as ISS Lite, but is the full-featured “pro” version. Although it is a pricey compared to other apps, I recommend it.

Well, that’s what I have found so far. Any other suggestions?

– 73, Bob K0NR

This is an older posting, see my updated list here

The Universal Reason

Posted on 23 March 2011 by Bob K0NR

As previously reported, I’ve been tuning up my APRS gear and have several stations (usually) on the air: K0NR home station, K0NR-1 Trout Creek Pass digi, K0NR-5 smartphone and K0NR-7 VX-8GR handheld.

Someone asked me “What’s the purpose of this APRS stuff, anyway?”

I wasn’t sure what to say, so I answered with…

The Universal Purpose of Amateur Radio:

To Have Fun Messing Around with Radios.

73, Bob K0NR

Completing the 2010 Trip Around the Sun

Posted on 31 December 2010 by Bob K0NR

As the year 2010 comes to an end, I feel compelled to write something really insightful and meaningful as we log another trip around the sun. Perhaps some brilliant insights for the coming year? Or predictions of future technology breakthroughs?

Instead, I am writing this.

This is a mishmash of my thoughts about amateur radio at the start of 2011:

Tech License Class: One of the most fun and rewarding ham radio things I did this year was help teach a couple of Technician License Classes. There is nothing like engaging with newbies to the hobby to give you a new perspective on how cool amateur radio really is! I have a great set of teammates that made this class fun and successful: Stu W0STU, Paul AA0K and Joyce K0JJW.
Next Challenge: The challenge we see right now is helping these newly licensed Techs get engaged with amateur radio, so they don’t drop out. My belief is that the Technician License is a beginners permit that only enables a person to get started in the hobby. We are cooking up some fun activities to keep them going.
Public Service: We have a good thing going with the local fire district and the RACES group in our county in terms of real engagement on emergency communications. This is fun, rewarding and a good thing for our local community.
Dayton Hamvention: I am going to skip Dayton (again) this year. Instead, I’ll attend the International Wireless Communications Expo (IWCE), a trade show centered on land mobile and mobile wireless communications. For me, it has an interesting mix of emergency communications, land mobile, data/voice convergence and test & measurement topics. Oh, did I mention that it is in Las Vegas? I suspect that it will be a better venue than Hara Arena 🙂
ICOM IC-9100: I have been patiently waiting for this rig to move from vaporware status to reality. Maybe it will happen this year?
Keep On Writing: I find that writing is good therapy, so I will keep that on the list for 2011. Mostly it will be this blog and the FM column for CQ VHF magazine.
Operating: It seems I don’t actually get on the air as often as I’d like, certainly not for the casual ragchewing QSO. Operating events seem to be a good way for me to get some air time: VHF Contests, Colorado 14er event, Colorado QSO Party, maybe an HF contest or two.
D-STAR: I haven’t been spending much time with D-STAR lately and I want to increase the focus on it. D-STAR falls into that dorking around with new technology category where experimenting with it and learning about it is the main activity. The technology continues to grow in adoption…arguably slow in real terms as the analog modes have such a huge installed base.
APRS: Oddly enough, I have been messing around with APRS again, mostly thinking of it as a tracking tool for hiking and other outdoor activities. Maybe we need to look at bridging APRS with D-STAR location data?

Amateur radio is clearly my #1 hobby interest, and by a wide margin. But it is primarily a hobby (yes, with a public service hook to it…at least for me). It is important to keep it in perspective and not let it turn into another job. I already have one of those.

What are you going to be doing in 2011?

73, Bob K0NR

Playing Around with APRS

Posted on 30 December 2010 by Bob K0NR

In the past few weeks, I started playing around with APRS again. Interest in APRS seems to come and go for me over time. It has the technical intrigue of figuring out how it works and the fun of exploring radio propagation paths. (If you are not familiar with APRS, K9DCI has a good introduction to it.)

The web site aprs.fi has some interesting hooks built into it that maps the location of APRS stations. I embedded a map here on my weblog page that shows my home station position (K0NR) and other stations in the vicinity. I intentionally blocked stations that only exist via the internet (no RF).

This map is dynamic in that it will update to show the latest APRS activity. It is fun to try select different map styles (courtesy of Google maps). Also, you may want to look at the html code to see how this is done.

73, Bob K0NR