Behringer HA400 mod
I enjoy contesting…. and often do so with a second person as a logger. A couple years back, I picked up a behringer HA400 to split audio between 2 sets…
Another Shack Reboot
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…
Soundcard Interface – A Different Approach… Part II
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…
Icom 706 mkIIg IF tap
just 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…
From my files: an older kludge… but it works
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…
Soundcard Interface: Design For EMI
ok – this should be the final post…. I did one more batch of updates… this time I designed for EMI. Not only did I ensure I had full isolation…
CI-V EXTERNAL VFO CONTROL, PART 3
well, there’s been some small progress…. I started tinkering with the rotary encoder. I found a great example here: http://www.pjrc.com/teensy/td_libs_Encoder.html one thing, though – encoder.h must be added to the…
CI-V External VFO Control, Part 2
OK, this update won’t have any videos… those will come shortly, so you’ll need to take my word for it. I learned a few things since the last post… so…
CI-V External VFO Control, Part 1
Many years ago, Sam, K9SD, added some interesting functionality to his Icom 781 radios – an external encoder wired in parallel to the VFO control. This may seem trivial, but…
Soundcard Interface Update
after much work, I got the VX1700 interface working. It would appear that the connection convention is a bit strange. From the service manual, Data OUT on the Data Jack…