re: still trying to track down a hum...

Posted by Tre' (P) on September 19, 2012 at 11:01:54

In Reply to: re: still trying to track down a hum... posted by mr9iron on September 18, 2012 at 14:08:34:

Take a pair of RCA interconnect cables and cut one end off of each.

Solder the wire end to the circuit at the 12by7. Positive to the grid stop resistor (10K), top of the 1meg resistor, and ground (shield) to the same ground point of the grid resistor (1meg).

Do both channels. Disconnect the in-chassis input cable.

Connect the other ends to your preamp. Make sure nothing is grounded. If any of your equipment has 3 prong plugs, use a cheater adapter so nothing is earth grounded.

Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"

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Follow Ups Full Thread

Topic - re: still trying to track down a hum... - mr9iron 01:41:53 09/15/12 (16)

re: still trying to track down a hum... - Ron V 03:43:27 09/21/12 (1)

re: still trying to track down a hum... - mr9iron 14:18:17 09/21/12 (0)

re: still trying to track down a hum... - DannyR 12:10:52 09/19/12 (0)

re: still trying to track down a hum... - FenderLover 06:41:24 09/17/12 (1)

re: still trying to track down a hum... - mr9iron 10:45:20 09/17/12 (0)

re: still trying to track down a hum... - Tre' 07:07:06 09/15/12 (10)

re: still trying to track down a hum... - mr9iron 10:11:35 09/15/12 (9)

re: still trying to track down a hum... - mr9iron 02:05:33 09/16/12 (3)

re: still trying to track down a hum... - Tre' 13:46:52 09/18/12 (2)

re: still trying to track down a hum... - mr9iron 14:08:34 09/18/12 (1)

re: still trying to track down a hum... - Tre' 11:01:54 09/19/12 (0)

re: still trying to track down a hum... - Tre' 17:28:03 09/15/12 (2)

re: still trying to track down a hum... - mr9iron 20:19:30 09/15/12 (1)

re: still trying to track down a hum... - Tre' 07:37:29 09/16/12 (0)

Classic ground loop - Chris O 11:14:37 09/15/12 (1)

RE: Classic ground loop - mr9iron 20:25:51 09/15/12 (0)

Follow Ups

re: still trying to track down a hum... - Tre' 11:01:54 09/19/12 (0)

re: still trying to track down a hum...

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