17 December 2009

Stuck with 50 MHz QRP TX

I have been thinking for a week how to proceed on my 50 MHz TX and I haven't decided yet.

I have one fixed frequency transmitter that puts out some 30mW CW that I could turn into AM (or DSB). This would mix digital circuits with analog transistors.

I have another transmitter on a single chip, XTAL based so that it can work on FM. It's a neat design, it doesn't want to emit a proper 50 MHz harmonic but rather generates weird multiplication factors.

I have spent a good amount of time trying to make the FM TX work, actually to multiply correctly, but I also want to get on the air with an homebrew voice transmitter and AM is the closest...

I will have few more sleeps on this :-)