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.
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.