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Re: A-4 Repair [message #26918 is a reply to message #26502]

Sat, 25 August 2018 00:15

chicagobill
Messages: 2005
Registered: April 2003

Senior Member

The 15 volts is a typo. If it wasn't there would be about 13 volts across the bias diode string.
The usual voltage would be about -0.5 volts.

Does the distortion occur with both preamp channels?

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[Message index]

		A-4 Repair By: Jonomega3 on Sat, 27 January 2018 08:20
		Re: A-4 Repair By: chicagobill on Sat, 27 January 2018 12:26
		Re: A-4 Repair By: Jonomega3 on Sun, 28 January 2018 00:28
		Re: A-4 Repair By: chicagobill on Sun, 28 January 2018 14:13
		Re: A-4 Repair By: Jonomega3 on Sun, 28 January 2018 15:44
		Re: A-4 Repair By: stevem on Mon, 29 January 2018 08:18
		Re: A-4 Repair By: Jonomega3 on Mon, 29 January 2018 21:16
		Re: A-4 Repair By: chicagobill on Mon, 29 January 2018 23:48
		Re: A-4 Repair By: stevem on Tue, 30 January 2018 12:07
		Re: A-4 Repair By: Jonomega3 on Tue, 30 January 2018 13:24
		Re: A-4 Repair By: stevem on Tue, 30 January 2018 15:24
		Re: A-4 Repair By: Jonomega3 on Wed, 31 January 2018 12:47
		Re: A-4 Repair By: stevem on Thu, 01 February 2018 08:23
		Re: A-4 Repair By: Jonomega3 on Thu, 01 February 2018 11:13
		Re: A-4 Repair By: Jonomega3 on Thu, 08 February 2018 15:12
		Re: A-4 Repair By: stevem on Fri, 09 February 2018 08:32
		Re: A-4 Repair By: Jonomega3 on Fri, 09 February 2018 12:54
		Re: A-4 Repair By: chicagobill on Fri, 09 February 2018 15:39
		Re: A-4 Repair By: Jonomega3 on Fri, 09 February 2018 17:07
		Re: A-4 Repair By: Jonomega3 on Fri, 09 February 2018 18:30
		Re: A-4 Repair By: chicagobill on Fri, 09 February 2018 23:46
		Re: A-4 Repair By: Jonomega3 on Sat, 10 February 2018 12:00
		Re: A-4 Repair By: chicagobill on Sat, 10 February 2018 23:54
		Re: A-4 Repair By: Jonomega3 on Sun, 11 February 2018 00:27
		Re: A-4 Repair By: stevem on Sun, 11 February 2018 06:24
		Re: A-4 Repair By: Jonomega3 on Sun, 11 February 2018 10:58
		Re: A-4 Repair By: chicagobill on Sun, 11 February 2018 15:41
		Re: A-4 Repair By: Jonomega3 on Sun, 11 February 2018 21:05
		Re: A-4 Repair By: Jonomega3 on Mon, 12 February 2018 10:10
		Re: A-4 Repair By: stevem on Mon, 12 February 2018 07:29
		Re: A-4 Repair By: Jonomega3 on Mon, 12 February 2018 09:04
		Re: A-4 Repair By: stevem on Mon, 12 February 2018 10:18
		Re: A-4 Repair By: Jonomega3 on Mon, 12 February 2018 10:41
		Re: A-4 Repair By: chicagobill on Mon, 12 February 2018 12:47
		Re: A-4 Repair By: Jonomega3 on Mon, 12 February 2018 13:25
		Re: A-4 Repair By: chicagobill on Mon, 12 February 2018 14:25
		Re: A-4 Repair By: Jonomega3 on Mon, 12 February 2018 16:07
		Re: A-4 Repair By: chicagobill on Mon, 12 February 2018 18:08
		Re: A-4 Repair By: stevem on Tue, 13 February 2018 07:39
		Re: A-4 Repair By: Jonomega3 on Tue, 13 February 2018 11:04
		Re: A-4 Repair By: chicagobill on Tue, 13 February 2018 16:40
		Re: A-4 Repair By: Jonomega3 on Thu, 26 July 2018 12:43
		Re: A-4 Repair By: chicagobill on Fri, 27 July 2018 00:02
		Re: A-4 Repair By: Jonomega3 on Sat, 28 July 2018 14:31
		Re: A-4 Repair By: stevem on Sun, 29 July 2018 06:06
		Re: A-4 Repair By: Jonomega3 on Sun, 29 July 2018 14:10
		Re: A-4 Repair By: Jonomega3 on Thu, 16 August 2018 11:45
		Re: A-4 Repair By: stevem on Thu, 16 August 2018 12:40
		Re: A-4 Repair By: Jonomega3 on Thu, 16 August 2018 13:14
		Re: A-4 Repair By: Jonomega3 on Thu, 16 August 2018 18:51
		Re: A-4 Repair By: stevem on Fri, 17 August 2018 06:51
		Re: A-4 Repair By: Jonomega3 on Fri, 17 August 2018 06:58
		Re: A-4 Repair By: stevem on Sun, 19 August 2018 06:15
		Re: A-4 Repair By: Jonomega3 on Mon, 20 August 2018 12:18
		Re: A-4 Repair By: stevem on Mon, 20 August 2018 12:27
		Re: A-4 Repair By: Jonomega3 on Fri, 24 August 2018 18:22
		Re: A-4 Repair By: chicagobill on Sat, 25 August 2018 00:15
		Re: A-4 Repair By: Jonomega3 on Sat, 25 August 2018 07:58
		Re: A-4 Repair By: Jonomega3 on Sat, 25 August 2018 11:43
		Re: A-4 Repair By: chicagobill on Sat, 25 August 2018 12:41

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