12 Apr 2014

Simple 3 transistor DSB transceiver for 28MHz

Stephen Walters G7VFY has reminded me of a simple 28MHz DSB transceiver from Japan . I think I have mentioned this before, but it is so simple and elegant that a second outing is called for.
3 transistor DSB transceiver
See: http://www.cqpub.co.jp/hanbai/books/15/15061/15061_p.180-181.pdf .


PA2RF said...

Nice design Roger, it's a pity the values for the coils are not clear. 73 all the best, Ron PA2RF

Antonio Bertezzolo said...

I built it with great success
See youtube 3 transistor qrpp transceiver...bye!