Category: Ham Radio

I am embarrassed that a year ago I promised to write more here on my blog.  As you can see, I haven’t.  So I think it’s time to write about something interesting.

For the last year or so, I have become interested in the growth of DMR in the Ham radio world.  DMR, simply put, is a digital voice technology that works over FM radios and gives extremely high quality audio output.  It’s one of several competing standards in ham radio right now, but is expanding rapidly due to the availability of low cost radios to work with it.

I became interested in building repeaters a while back and was first involved in All-Star Link.  As the technologies became more and more available to folks like me with “not a lot” of money, I decided that I was going to build and deploy a DMR repeater.  I’ve talked up the tech with my ham buddies for a while now, convincing several of them to purchase their own DMR radios.  And we’ve been developing a DMR repeater that we’d going to deploy (install) here in the next week or two.

As with most things with me, this has been a process of intense learning.  Learning how to configure repeaters, learning the basics of DMR, learning some of the more obscure things that can trip one up in the building of one.  Yes, I have been learning a LOT!  As normal, my initial estimate of the time it would take to get a working repeater was exceeded by about 500%!

Anyway, here we are today, with a working repeater that is almost ready to be put into place.  I must say my excitement is building again.  It’s been a long and somewhat painful road (I’d say not unlike having a baby, but I’m sure I’d get slapped down for saying that, so I won’t! LOL)

For those of you who might be interested, this repeater will be installed at the Fidelity Communications building in downtown Sullivan MO.  Considering the height of the antenna there, we think the repeater should have good range.  Pertinent technical details are as follows:

  • Repeater Output Frequency – 444.600
  • Repeater Input Frequency – 449.600
  • Color Code – 2
  • TS 1 Static Talk Groups  – none specified at this time
  • TS 2 Static Talk Groups – BYRG (31201)

This is an open repeater and is available for general public use.  If you have problems, please feel free to contact me.  Please be gentle though.  This is our first attempt at this! 😀

Ok, so I had built an AllStar Link node before (two actually, see some previous posts here) and I was feeling all great about myself and stuff.  I proposed to the club that we purchase a Raspberry Pi 3, a RIM Lite interface and with these things, we could build a new repeater controller for the 2 meter repeater.  Having had a fair amount of experience with a Raspberry Pi before, and some experience with a RIM Lite module, I thought to myself, “I got this!”

Well, not so much!



Doesn’t look like much, does it?  But it sure had me pulling out my very sparse hair over the weekend!




If you’re still reading along, I’ll try to BRIEFLY recount the issues I had and the lessons I learned.

LESSON 1:  Make sure you’re working with good hardware!

Actually, I tried to do this first.  I thought before I got too involved, I should at least test the new Raspberry Pi 3 and make sure it wasn’t faulty in some way.  So I assembled the pieces; the Pi, the case, the power cube and the USB cable that connects the power cube to the Pi (minus the RIM Lite at this point).  Now get a micro SD card, and load some software on it, insert it into the Pi’s card slot, and let ‘er rip!  Simple, right?  Well….  the basic image downloaded from the Raspberry Pi distribution site didn’t seem to be very stable.  It would lock up and misbehave in all sorts of ways.  I found this very confusing because my prior experience with the software from that site has shown it to be nearly bulletproof!  So what could be wrong?  I tried a few different software images and found similar results:  no matter what I did, it seemed like I had a flaky Pi.  In addition, I couldn’t seem to get the on board WiFi adapter working at all.  Color me very confused at this point!

LESSON 2:  Quit gnashing your teeth and listen to the experiences of others!

Ok, so, in fear of grinding my teeth down to smaller nubs than they already are and rather than lose more hair than I already had, I decided to start searching for answers on the Internet.  (Who knows more than the Internet does?  PLEASE stop laughing now!!)  After a few hours of searching, I really didn’t find anything that I thought was specific to my particular issues.  But I did start to realize that there was a nagging underlying issue in what I was reading of other folks problems.  It seems that many of them were having power related issues, mostly due to the fact that the Pi 3 requires more power than the previous Pi’s in the series.  My first thought was, how could this be a problem for me?  Surely the supplier sent a power cube that is powerful enough to manage all that the Pi could require!  Didn’t they?  I mean, I can trust them, right?  Ummm.. well…. errr…  grrr!  So I decided to power the Pi from a powered USB hub that I have.  Surely it would put out enough power.  I plugged it all up with the Pi and the USB cable that came with the Pi, and still, no joy!  Still flaky, still unreliable, still confounded and now a little depressed.

And I think that at this point, God realized that I was probably going to either burst a blood vessel, or have a major meltdown, neither of which would be good for me, nor for Auntie M, so a new idea fluttered through my mind.  I’d already eliminated the power cube, and I was trying to ensure the board itself was good.  The only thing left to try to replace was the USB cable that had been sent in the package.  Feeling very skeptical that this could be the problem, I found another USB cable with the right connectors and pulled out the one they had sent in the package.  Shaking my head back and forth just knowing this couldn’t be the problem, I plugged it all up again, with the cable I had from before.  Plugged into my local Ethernet, I logged in and decided I’d do something that had always locked it up before.  I asked the on board WiFi to scan for all WiFi networks it could see.  When I saw that it actually had done it and returned this nice very verbose list of everything it could see, I nearly peed my pants.  (I’m sorry, I know that’s probably a visual you really didn’t need, but somehow it felt right while I was writing this.) So after I contained my joy, (and checked my pants), I tried a few other things and no matter what, I couldn’t make the little Pi 3 board fall over into a comatose state!

LESSON 3:  Try, if you can, to make smart choices about the software you are using!

Feeling bold now that I had figured out the instability issue, I once again said to myself, “Now, I’ve got this!”  (I know, in retrospect, I should have known I was headed for disaster again!)  There were several distribution images that have AllStar Link on top of Linux for the Raspberry Pi.  If that doesn’t sound complicated enough, there are different distributions with different versions of Asterisk (the software that AllStar Link is based upon), some of which are RPi 2 compatible and some of which are RPi 3 compatible.  Yep, you guessed it, I tried four of them before I found one that seemed to work and also supported the on board WiFi adapter on the Pi 3.  Then I realized that the one that worked, was based on a different distribution of Linux than the ones that are currently supported by AllStar Link (the organization!).  SMH!!!  Really?  Come on!!!  Sighhhh!!!!

Wouldn’t you think that it would be a LOT easier than this?  I sure did!  At this point I had spent most of a week getting to this point, and it was late on Saturday night, so I decided that before my brain melted down again, I should really get some sleep.

LESSON 4:  Distance yourself from the problem to solve the problem!

Sometimes, distance gives you insight!  This must actually be one of my most favorite lessons, because I seem to need to keep learning it over and over and over again!  Time and distance gave me enough insight to go look closely at the place where the DIAL distributions came from and when I did, voila!! There, buried on a low lying, nondescript technical page (actually the MAIN page), I found a link to a release candidate for the NEXT version of DIAL on Raspberry Pi!  WOW!  How did I miss this before?  (If you’ve been following along, you already know the answer to that!)  But this, THIS is exactly what I’m looking for!

Alright, so, download, write to memory card, install in Pi, reboot!  Viola, right?   I’m SURE you know by now what’s coming next!

LESSON 5:  You STILL don’t know all you think you know!

Alright, it comes up and everything LOOKS ok.  I start poking around and it connects to the Ethernet just fine.  But I know that where this is going to end up, we need it to connect on WiFi.  So I start, with my STILL limited Raspberry Pi 3 knowledge, poking at it to try to get it to connect seamlessly on WiFi.  I try this, and I try that, relying of course on my EXTENSIVE knowledge of Raspberry Pi’s…  Yep, you guessed it!  What I thought I knew worked before and should be easy, just isn’t working anything like that any more!

So back to the wonderful world of answers, the Internet!  Of course, there aren’t always DEFINITIVE answers… well maybe there are if you know the EXACT RIGHT THING TO ASK!  Of course, I didn’t, but after digging my way through a dozen or more likely and many more unlikely answers, I finally figure out that the NEW version of the Pi software requires a different way of making the networking stuff work right.  Well, DUH!  Yes, once again in retrospect, I should have realized that there was something amiss that I still needed to learn.  But would my ego get there right away?  Nooooooooooo!!

LESSON LAST:  Be thankful for all that you have learned!

So, now it’s Sunday evening.  I’ve spent nearly a full week, getting to the point where I have a reliable, functional AllStar Link node that we can use as our repeater controller.  I am thankful that I’ve gone through all that I have this week because I personally have several more of these controllers to build.  At least one more will likely be for the club’s 440 repeater, and there will be at least two more for repeater projects that will reside here in or around Owensville, MO.

Despite all my failings this week, I think it’s time I rewarded myself with a nice cold scotch, and some good food.  And as I speak here, the scotch is already cold, and I’ll be making tacos tonight because I LOVE tacos!

Despite all my raving in this post, I hope you will all go away with the knowledge that I LOVE TECHNOLOGY and the challenges that it brings!  Long live the Internet, and long live projects that can keep my attention and desire to succeed as well as this one has!

Thanks for reading along!  If you’ve made it this far, you are truly amazing! 😉



At the September 8th meeting of the Sullivan Amateur Radio Club, I gave a presentation about AllStar Link and the changeover of our EchoLink node to AllStar Link.  You can view the Powerpoint presentation at the link below:

IMAG0031Ok, so a few posts ago, I lamented about how EchoLink was sorta boring.  And because I felt that way, I undertook a project to evolve my traditional Windows based EchoLink node to an AllStarLink node (with an EchoLink channel!)

Well, after a couple of weeks of learning AllStarLink, and sorting out a malfunctioning interface module, it’s finally up and running and by all accounts it sounds really great!  And before I go any further, I want to give my sincere thanks to Scott Zimmerman (N3XCC) of Repeater-Builder fame who built and supplied the modules I used and for his help in sorting out the bad module.  Scott is a great guy and a stand-up businessman and I would highly recommend his products!  I used the RIM-Maxtrac-RM (correction: I used the RB_RIM_Maxtrac interface! Thanks Scott!) version of his line which can be found at .  This module has a 16 pin connector that plugs directly onto the back of the Motorola Maxtrac radio that I was using for the EchoLink node.  A picture of this module can be seen on the left below and as the lower left image and the middle image of the 5 images at the top of Scott’s product page.  IMAG0032The module provides a nice, compact audio and control interface to the computer in a single USB connection.  I used the most recent DIAL image for installing AllStarLink on the computer, and was actually up and running fairly quickly (if you take out the time we spent sorting out the bad module.)

I’m really quite amazed at the flexibility and programmable control one can have using the AllStarLink system.  It’s designed to be a full fledged repeater controller and repeater linking system.  The default audio quality AllStarLink uses is quite a bit better than I imagined.  Even the EchoLink connections sound better to me than they did before!  As a bonus, the streaming audio feed for the repeater to which the radio is tuned now originates directly out of the AllStarLink node.  The quality improvement of this alone made the entire project worthwhile!

I invite you to check out the node if you like!  On AllStarLink it is node number 43758 and on EchoLink it is still  node N0NOE-R (407714.)  The radio is tuned to the input and output frequencies of the Sullivan Amateur Radio Club 2 meter repeater which is located in West Sullivan, MO and is on 146.805 Mhz.


The EchoLink node has been up and running well for quite a while now.  You might ask, why would you want to change anything about it?

Well, to be honest, it’s kinda boring!  Yeah, it works, and it’s providing a service.  We have a few people who use it fairly regularly.  The truth is that it’s somewhat limited though, and I’ve been researching a somewhat newer technology called Allstar Link.

The nice thing about Allstar Link is that it would allow for linking with any other Allstar Link node, it would continue to provide EchoLink access to the club’s repeater and it provides several alternative methods to connect to the node itself.  It can even be a complete repeater controller in itself, a use that I intend to explore in another separate project in the very near future.

So today, I ordered the interface I need to connect to the existing EchoLink radio.  I already have a testing Allstar Link node up and running and have connected to it from virtually every IP based device I own.  When the interface comes in, I’ll move the radio from the existing EchoLink computer to the Allstar Link computer and we’ll just have us some new Allstar Link fun!  Hopefully, it’ll sound as good as the current setup.

The Technician’s class that I signed up to teach finished up yesterday evening with all the students passing their Element 2 exam to become licensed Hams.  I’m very happy with those results, but certainly can’t take a lot of credit for it. First and foremost, I have to give credit to the students themselves.  Not only did they listen to me drone on and on and managed to stay awake, but they clearly studied a lot outside of the class and prepared well for the test.  Hats off to Terri Booth, JD McReynolds, Derek Johnson and Dave Johnson for being such excellent students!

In addition, I need to give a lot of credit to John McReynolds (KC0NRO) for his immense help in providing explanations and the student’s study materials.  I could not have done this class without his assistance!  Also, I want to thank Chris Westrick (KD0JVF) for gaining the commitment to use the room.  Many thanks also go to Jay Basinger (AA0FR) and Jim Spencer (KC0NUY) for being part of the test team last night.  Last but not least, I’d like to thank the Members of Sullivan Fire House #5 for allowing us to use their facility.

I think when I first volunteered to run the class, I thought it would be a lot easier for me than it was.  Throughout my career, I did a fair amount of presenting and training.  I found out that the materials we used (the handouts and the slides) really need some coordination and a fair amount of  work before we do this again.  I intend to do that over the coming months and hopefully, the next time, things will go much smoother.  Over the course of the last month I also realized that my presentation skills have really gotten rusty.  They definitely need some shining up and polishing before we try it again!

As I said though, I’m very happy with the results.  I’m certain we will do this again!  Hopefully I’ll be better prepared!

As many of you know, 10 meters is seldom open these days.  It is today, however, and I got excited because I can hear MANY stations.  So I tuned one up and when he called QRZ, I tried to respond.  And I got nothing, only minimal power out.  Adjusted everything I could but still nothing.  Grrrrrr…  I need to get this radio working properly on 10 or find one that does!

I  know that I’m several years behind with the technology, but I’m giddy like a schoolgirl tonight because I built my first Broadband Mesh Network today. It wasn’t big,  just two nodes and a couple of devices connected, but it all worked just like it’s supposed to. I  am amazed at how easy it really is. Can’t wait to hook up one of my nodes to the big 24 dB gain dish antenna and see what we can do with that! 😁

All you hams out there know what this means… 😀


(For those of you who aren’t hams, it just means that I’ve been approved to administer amateur radio licensing tests. No biggie!)

I am currently attempting to organize a Technician’s Class Ham License exam prep session and test session for sometime in the near term future!  (Probably sometime in June!)  If you have any interest at all, and would be close by and would like to partake in a free class, and the test session afterward, please let me know.  This is still very fluid, and I’m shooting to have the class and test session in Sullivan, MO.  If you are close by and would like to become a ham, this is a great opportunity for you.  Pay attention to this site, or our club’s site at for more information!