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In Reply to: RE: When the inputs are shorted the amp is dead silent. (great!) posted by DannyR on July 6, 2016 at 12:56:00:

This, plus the fact it's 60 Hz and the amp is quiet when the inputs are shorted, strongly implies a shielding issue inside the amplifier ahead of the first amplifier stage. I'm not familiar with the Cit V at this level, but has the signal input wiring been changed from factory? Was it originally twisted pair or shielded wire, now plain single wires? Are the input resistors still in place (1M to ground and 10K in series, according to my schematic)? Have any of the NFB loops been modified or removed?

Edits: 07/10/16

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Follow Ups Full Thread

Topic - Hum Trackdown - DannyR 18:29:32 07/05/16 (6)

RE: Hum Trackdown - Chip647 19:34:37 07/05/16 (5)

RE: Hum Trackdown - DannyR 19:43:07 07/05/16 (4)

When the inputs are shorted the amp is dead silent. (great!) - Chip647 06:03:59 07/06/16 (3)

RE: When the inputs are shorted the amp is dead silent. (great!) - DannyR 12:56:00 07/06/16 (2)

"I've tried countless sources." - Triode_Kingdom 13:10:05 07/10/16 (1)

RE: "I've tried countless sources." - DannyR 22:54:42 07/11/16 (0)

Follow Ups

"I've tried countless sources." - Triode_Kingdom 13:10:05 07/10/16 (1)

RE: "I've tried countless sources." - DannyR 22:54:42 07/11/16 (0)

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