[fenbach]

here's a simple-minded transmitter that might be fun to build. if someone can come up with a complete schematic. https://www.vintage-radio.info/download.php?id=344

or go to  https://www.vintage-radio.info/data  and click on the link to AM03 modulator.

see also  https://www.vintage-radio.com/reviews/am03.html for a picture of the top of the circuit board, anyway.

I do find a schematic for another simple one, by a Tim Williams. one tube, a 6AQ5.

http://webpages.charter.net/dawill/tmora...mitter.gif

OK, I do have too much free time on my hands.