[Milsurplus] French TRC-300 transeiver

[Military1944 at aol.com]

Regarding the French Thomson TRC-300 hf rig.
 
I took mine off the shelf to play with, knew the batteries needed changing  
so dug out the original cells and cleaned the battery box up. While I thought  
how best to refill it I put it on an external supply only to find the auto 
tune  atu was not working. It appears to be 'hunting' and unable to know when its 
on  tune. 
 
Ah I thought, easy, obviously there must be a swr board in it, probably one  
of the diodes had somehow, while switched off and on the shelf, gone u/s. 
 
(I don't understand how things go faulty when they sit on shelves.  Obviously 
it was working the last time I used it and put it out to rest.)
 
Anyway, opens up the atu. Oh my gwad !!! there is a lot of stuff in there.  I 
cannot really figure it but I can see three sets of ferrite rings with wires  
and diodes near so its measuring forward and reflected power etc but there is 
a  whole bunch of electronics in there, even tuned circuits that look VHF if 
not  UHF in frequency, God knows what they are measuring. Anyway, its more 
than a  1N914 that's needed. 
 
So, does anyone have circuits ?   I did find one web site where  the guy 
stated he had info but have had no replay to a request as of yet. 
 
cheers, Ben G4BXD



   
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