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Re: K200B-1 left channel makes a loud whooshing sound [message #23228 is a reply to message #23227]

Thu, 02 July 2015 20:32

chicagobill
Messages: 2005
Registered: April 2003

Senior Member

Yes, the volume control on these amps does two things. One it changes the gain of the stage and two it grounds out the signal from the output of the stage. If the noise is controlled by the volume control, then the first transistors are suspect.

Look up the schematic in the technical section and you'll see what I mean.

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[Message index]

		K200B-1 left channel makes a loud whooshing sound By: gui_tarzan on Thu, 02 July 2015 18:27
		Re: K200B-1 left channel makes a loud whooshing sound By: chicagobill on Thu, 02 July 2015 20:32
		Re: K200B-1 left channel makes a loud whooshing sound By: stevem on Fri, 03 July 2015 06:53
		Re: K200B-1 left channel makes a loud whooshing sound By: gui_tarzan on Fri, 03 July 2015 09:03
		Re: K200B-1 left channel makes a loud whooshing sound By: chicagobill on Fri, 03 July 2015 13:20
		Re: K200B-1 left channel makes a loud whooshing sound By: gui_tarzan on Fri, 03 July 2015 14:16
		Re: K200B-1 left channel makes a loud whooshing sound By: stevem on Fri, 03 July 2015 16:40
		Re: K200B-1 left channel makes a loud whooshing sound By: gui_tarzan on Fri, 03 July 2015 18:50
		Re: K200B-1 left channel makes a loud whooshing sound By: chicagobill on Fri, 03 July 2015 22:59
		Re: K200B-1 left channel makes a loud whooshing sound By: gui_tarzan on Sun, 05 July 2015 14:00
		Re: K200B-1 left channel makes a loud whooshing sound By: gui_tarzan on Mon, 06 July 2015 22:46
		Re: K200B-1 left channel makes a loud whooshing sound By: stevem on Sat, 04 July 2015 06:00
		Re: K200B-1 left channel makes a loud whooshing sound By: chicagobill on Tue, 07 July 2015 02:41
		Re: K200B-1 left channel makes a loud whooshing sound By: gui_tarzan on Tue, 07 July 2015 20:09
		Re: K200B-1 left channel makes a loud whooshing sound By: chicagobill on Wed, 08 July 2015 02:39
		Re: K200B-1 left channel makes a loud whooshing sound By: gui_tarzan on Wed, 08 July 2015 18:55
		Re: K200B-1 left channel makes a loud whooshing sound By: gui_tarzan on Fri, 17 July 2015 19:41
		Re: K200B-1 left channel makes a loud whooshing sound By: chicagobill on Sat, 18 July 2015 02:13
		Re: K200B-1 left channel makes a loud whooshing sound By: stevem on Sat, 18 July 2015 06:27

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