D201a No AM carrier or LSB modulated power, however USB OK

[2600]

There are two crystals on the balanced modulator board. One of them provides a receive and transmit carrier for USB, 6.2535 MHz. The other one provides the LSB carrier for transmit and receive both, and provides the AM transmit carrier, 6.2565 MHz. That crystal has most likely failed. Might have a look at the trimmer cap for that crystal. If the trimmer became seized, turning the screw slot can break the solder bond between the screw head and the ceramic ring under it. Most likely one or the other, if not both.

Barkett still has that crystal. stores.goldeneagleradios.com/tram-d201-201a-crystal-6-2565/

Bear in mind he plans to get out of the crystal business and probably won't restock this one when it's gone.

73

[389]

Thanks, Yes bad Xtal X201 
Adrian