[Milsurplus] TCS transmitter mod: Help

[Robert Goff]

I recently acquired a TCS-5 transmitter that is in good overall condition 
but has been modified by a previous owner.  The most obvious change was a 
missing back panel, but in addition there have been some changes to the 
audio circuit.  The microphone transformer is gone, and in place of the 
crystal rack someone has built what seems to be a microphone amplifier.  On 
top of the plate mounted in place of the crystals there is a 9-pin miniature 
socket (empty) and the shaft of a potentiometer, and beneath the associated 
resistors and caps.  The mic amp seems to be connected directly to the 
microphone/ key jack and the send-receive relay. Four of the six leads on 
the CW/Phone switch have been cut as well.

I have my doubts as to whether the transmitter ever worked as I received it, 
but I'd like to find some documentation on this mod, as that would help me 
greatly in restoring the original connections.  I wonder if it wasn't 
published in one of the ham magazines.  Does it sound familiar to anyone?
So far that's all I've been able to figure out from the schematic. I'm still 
waiting on a manual I ordered from Fair Radio, which will help in 
determining more exactly the extent of the modifications.
Thanks,
Robert Goff
W7MKA

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