Matti Adolfsen wrote:

I have problems with 2 aircraft receiver-transmitters.


I think I can solve this
problem by reverse-engineering the RF stage, still I think a schematic
might help.


When I needed to repair a Dittel Transceiver (other model) a couple of weeks
ago I contacted Dittel through their website http://www.dittel.de/ and
they sent me a service manual through their local (swiss) sales
representative quickly and at a moderate price.

George