This post describes the design of a multi-input MIDI encoder intended for switch-heavy control applications like Virtual Pipe Organs or Amateur Radio Station Automation.
A couple of years ago, I found a Johnson Viking Mobile transmitter on eBay. It appeared to be complete and in pretty good condition. The price wasn’t too unreasonable, so I made a bid and won the auction. It is about the size of a shoe box. I planned to ease into tube equipment restoration by starting with a relatively simple project.
I wondered if I could ask an AI to design such a circuit. So I prompted ChatGPT: “Simple one transistor circuit to amplify a 20 MHz signal generator.” The resulting answer was quick and amazing.
Ten Tec documentation is minimal at best and there aren’t any professionals at Ten Tec to consult any more. We’re on our own. I’m sharing a minimal alignment process I used to get a radio back within spec.
An unexpected journey into frequency measurement after purchasing a mixed lot on eBay. Initially discovering a vintage frequency counter, they later enhance it with a GPS Disciplined Oscillator for exceptional accuracy. This upgrade transforms their testing capabilities, merging classic equipment with modern technology to create a GPS disciplined frequency counter for their workshop.
The Symptoms We recently traveled to Omaha to visit a high-school friend and fellow ham. He had purchased a Ten Tec Omni VI Plus on…
I learned in early March, 2024 of Bob Heil’s passing. Although I never got to meet Bob Heil in person, I feel his influence in my own enjoyment of the Amateur Radio hobby. Let’s see if I can build Bob Heil’s classic microphone equalizer!
It’s been about a year since my last post on the Mac, FT8 and the Ten Tec Omni 6 Plus. Since then I’ve learned a few things, made some refinements in my setup and developed a better idea of how I want to use my station. It’s time to talk about integrating MacLogger DX with WSJat-x and GridTracker. Plus, there’s an FLDigi Bonus!
Building a solid state DC converter to power a 1950’s era mobile tube transmitter. The build uses an NOS Triad TY-83 toroidal transformer and high-power germanium transistors – the best available power conversion tech in the late 1960’s and early 1970’s.
I’ve been using MacLogger DX (MLDX) for several years now, and would like to have it connect with my antenna rotator. It supports several models, and can automatically command a rotator to a bearing based on a ham’s QRZ location. An Arduino can be used to connect MacLogger DX to an inexpensive antenna rotator.