Yesterday evening, I was trying to make some WV QSO Party contacts, with the hope of reprising my victory in 2004 (I was the high scorer from the state of MI). Unfortunately, either the skip was too long or there just weren’t any WV stations on 80m CW.
So, I started tuning around and heard Bill, K4JYS, calling CQ. We had a very nice QSO, and it turned out that Bill was using a homebrew, one-tube transmitter using a 6A6 tube. I Googled “6A6 transmitter” and found this circuit. Apparently, it can be made with many different types of dual triode tube types. Here’s another site with information on this type of transmitter.
The transmitter had a very nice note with only a little bit of chirp. Bill said he was using 16, 9-V batteries connected in series for the plate supply. I think that helped keep the plate voltage quite steady and thereby the chirp to a minimum.
Anyway, yet another project to put into the queue.