Input Transformer for FX Return on Auditronics 110 / Grandson

bjoneson · Mar 29, 2017

Anyone know which transformer is used on the input / return for the FX master modules (EMM)? Or have one, and would be willing to pop the module and look?

Mine were missing on the console I got. Same footprint as the input modules (Jensen Can). But not certain it's the same transformer. Schematics don't specify ratio.

Any help greatly appreciated!

plumsolly · Mar 30, 2017

I think they are 10K:10K, but not positive. I think older modules were Triad 600:600. There is no pad before the transformer is there?

bjoneson · Mar 31, 2017

Unfortunately, I have the modules and schematics boxed up. Right in the middle of moving. But, I'm 90% sure you're correct, that there is no pad.

I'm not sure 10k:10k or 600:600 makes sense, as I do know for certain the gain of the 5534 that follows is definitely greater than unity. Maybe a 10k:600 with a load resistor?

bjoneson · Oct 17, 2017

So... finally dug the schematics out. Any guesses on that transformer? 8:1 or 4:1 maybe?

Input Transformer for FX Return on Auditronics 110 / Grandson

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Input Transformer for FX Return on Auditronics 110 / Grandson

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