Dan Koellen AI6XGMay 99 minLCD Display for the KD1JV TriBanderIn an earlier post I described the modifications I made to the KD1JV designed TriBander to make it more useful for SOTA. The...
Dan Koellen AI6XGMay 2, 20236 minQRP Tube: High Voltage DC to DC Supply EvaluationThe high voltage supply for the vacuum tube transmitter needs to be low noise in the 40 meter band, efficient for battery operation and...
Dan Koellen AI6XGMay 2, 20236 minQRP Tube: T/R Switch and QCX Interface and ModificationA Modified QCX and TR Switch for Vacuum Tube SOTA transmitter
Dan Koellen AI6XGMay 2, 202315 minQRP Tube: Single Tube SOTA TransmitterA single tube transmitter is developed for portable and Summits on the Air (SOTA) use. The SOTA transmitter had to be relatively...
Dan Koellen AI6XGMay 2, 20235 minQRP Tube: Vacuum Tube, Battery, Lightweight, Compact, Portable: Can They Coexist?Using vacuum tube equipment for SOTA activations? Why not! A portable battery operated vacuum tube transmitter is part of a SOTA system.