Ramblings of yet another nerd…
occasionally at work, I have the need to perform some weak signal work, much like trying to get that last multiplier during November sweepstakes. At my previous employer, I let one of the technicians try out my Heil Proset Plus for listening work- he loved it. those headsets are made to be worn all day. …
Read More headphone phase reverse
After much experimenting and trial and error, I got almost all of the radio functions tested and working. I did run into an interesting problem, though. If I included ALL of the Icom CI-V enabled radios, and included 2 “spare” integers with the lookup structure, the Arduino would fail out after 180 items in the …
Read More More Icom Remote Device Updates
It has been a LONG time since I seriously did any C programming… and structures were something we only vaguely touched on in class. I’ve already used up about 60% of my dynamic memory – a huge chunk of it is the array of structures, containing a string, a hex byte, an integer, and 2 …
Read More Still working on the Icom Project
Well, I’m back to the Arduino <–> Icom projects. I just acquired an Icom 7300 – and found (according to others, as well) that it and the 7610 bury a lot of functions in menus that aren’t quickly accessible from the front panel… so now I want an external controller for my Icom 7300 – …
Read More Icom External VFO and Control – revisited and revised
So – after moving, i was presented with a much smaller space to call my shack. Since my wife was working fomr home, we had to build her some office space. We arranged the space as an extra bedroom with walk-in closet. With this arrangement, she was only using the office during the daytime hours. …
Read More Another Shack Reboot
Another “older” project I want to post now, just for others to benefit from my learning experience… For years, I’ve wanted a repeater to tinker with. Back as far as my time in Rolla, I’ve had most of the parts, but have always been short on the final steps. It all started with an interest …
Read More Motorola R100 External Controller Interface
Well, I went on the trip…. and I couldn’t operate a single bit. The noise floor in the hotel was S9+… on ALL HF bands. It appeared to be the AC units in the building. While I have experience helping a friend troubleshoot AC units (“A Tale of Two Air Conditioners”, August 2016 Edition of …
Read More Soundcard Interface – A Different Approach… Part II
I haven’t given up on my custom PCB for a soundcard interface, because it’s a labor of love…. the first board has been populated, but needs some troubleshooting. I suspect the status LEDs are giving me fits. That being said, I had a trip lined up where I thought having a QRP HF setup would …
Read More Soundcard Interface – a different approachjust my experience using the PAT IF buffer from SDR-KITS.COM. power pick off point… 7.8VDC on recieve First IF tap point and coax connection to the PAT board. Note the shield connected to a ring terminal that goes under the closest screw to the IF connection, then the coax connects to the board in a …
Read More Icom 706 mkIIg IF tap
I was headed out to a cub scout campout, and needed an antenna for Jamboree On The Air (JOTA). I needed something flexible, robust, and visible. After digging in the garage a bit, I saw a couple orange extension cords in the corner and had an “aha!” moment. Feeding an extension cord from an autotuner …
Read More From my files: an older kludge… but it works