Demeter TGA-3A function wiring

M

Mean Old Fireman

Member
I have an early (2 digit serial number) that I want to control with a MM PBC 6x. Does anyone know the pinout? This ONLY has the 5 pin XLR footswitch jack, it does not have the TRS jacks that the later amps have.
 
Mario said:
I believe it is;

Neutrik #NC5MX
Pin #1 = Ground
Pin #2 = Clean/Dirty
Pin #3 = Edge/Solo
Click to expand...
Let me give that a try. (I that might be the pinout for the newer models with the wider chassis, the front panel Chanel switch and the trs jacks), but let me give that a try.)

Thanks!
 
I pulled that pinout from an Excel file I have from 2007, and I haven't updated the file since then, so it's pretty old.
 
I appreciate the reply. My newer TGA-3As are wired that way. This amp is from '89 or '90. He changed the circuitry at some point in the early '90's. Added a "Dark" switch for the gain channels, moved the send and return levels to the front panel, and, probably most relevant, added a channel select switch to the front panel and two 1/4" jacks for the foot switch (in addition to the 5 pin XLR.

I guess I'll be calling Templeton. Thanks again for your response.
 
I don't know how the earlier amps were wired, but can't you just do a continuity test from the XLR pins to the tip contacts on the front panel? You could maybe put an XLR plug without the housing and make a jumper so you can jump pin 2 to pin 1 and pin 3 to 1 to see what they do. I had a 90's TGA-3 and pins 2 and 3 from the XLR were wired directly to the tip lugs of the switching jacks.
 
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