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How can I stop reverb howling on K 100? [message #25173]

Thu, 07 July 2016 17:22

lassoharp
Messages: 13
Registered: July 2016

Junior Member

Greetings,

I have a K 100-2 head that just received a new replacement reverb tank from MOD. The reverb works fine but the amp breaks into low frequency howling whenever the reverb is turned up just the slightest bit. It only does then when the head is sitting on top of a speaker cabinet. I understand that this is a form of mechanical coupling and is thus dependent on physical proximity to the speakers, but it seems it shouldn't be doing this under any conditions. Are there any known fixes to alleviate this issue?

Also, I have been doing some background reading on this topic and for reference, I have checked the following things:

1) The replacement tank jacks are internally grounded on both input and output

2) Both RCA jacks on the PC board for the send and return have been cleaned and are nice and shiny

Thanks

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[Message index]

		How can I stop reverb howling on K 100? By: lassoharp on Thu, 07 July 2016 17:22
		Re: How can I stop reverb howling on K 100? By: chicagobill on Thu, 07 July 2016 22:54
		Re: How can I stop reverb howling on K 100? By: lassoharp on Fri, 08 July 2016 01:13
		Re: How can I stop reverb howling on K 100? By: stevem on Fri, 08 July 2016 06:57
		Re: How can I stop reverb howling on K 100? By: lassoharp on Fri, 08 July 2016 08:52
		Re: How can I stop reverb howling on K 100? By: stevem on Fri, 08 July 2016 11:31
		Re: How can I stop reverb howling on K 100? By: chicagobill on Fri, 08 July 2016 13:20
		Re: How can I stop reverb howling on K 100? By: lassoharp on Fri, 08 July 2016 17:09
		Re: How can I stop reverb howling on K 100? By: stevem on Sat, 09 July 2016 06:44
		Re: How can I stop reverb howling on K 100? By: pleat on Sat, 09 July 2016 10:19
		Re: How can I stop reverb howling on K 100? By: stevem on Sun, 10 July 2016 06:08
		Re: How can I stop reverb howling on K 100? By: pleat on Sun, 10 July 2016 06:50
		Re: How can I stop reverb howling on K 100? By: lassoharp on Sun, 10 July 2016 16:02
		Re: How can I stop reverb howling on K 100? By: C4ster on Mon, 25 July 2016 15:39
		Re: How can I stop reverb howling on K 100? By: chicagobill on Mon, 11 July 2016 12:34
		Re: How can I stop reverb howling on K 100? By: lassoharp on Mon, 11 July 2016 22:22
		Re: How can I stop reverb howling on K 100? By: chicagobill on Tue, 12 July 2016 13:29
		Re: How can I stop reverb howling on K 100? By: lassoharp on Tue, 12 July 2016 17:24
		Re: How can I stop reverb howling on K 100? By: chicagobill on Tue, 12 July 2016 23:31
		Re: How can I stop reverb howling on K 100? By: lassoharp on Mon, 25 July 2016 13:22
		Re: How can I stop reverb howling on K 100? By: C4ster on Mon, 25 July 2016 15:40
		Re: How can I stop reverb howling on K 100? By: lassoharp on Mon, 25 July 2016 17:05
		Re: How can I stop reverb howling on K 100? By: C4ster on Mon, 25 July 2016 17:16
		Re: How can I stop reverb howling on K 100? By: vintagefan on Thu, 28 July 2016 03:38
		Re: How can I stop reverb howling on K 100? By: stevem on Thu, 28 July 2016 06:32
		Re: How can I stop reverb howling on K 100? By: lassoharp on Thu, 28 July 2016 10:19
		Re: How can I stop reverb howling on K 100? By: stevem on Thu, 28 July 2016 14:01
		Re: How can I stop reverb howling on K 100? By: lassoharp on Thu, 28 July 2016 14:37
		Re: How can I stop reverb howling on K 100? By: pleat on Thu, 28 July 2016 18:47
		Re: How can I stop reverb howling on K 100? By: lassoharp on Fri, 29 July 2016 07:37
		Re: How can I stop reverb howling on K 100? By: stevem on Sun, 31 July 2016 11:15
		Re: How can I stop reverb howling on K 100? By: lassoharp on Sun, 31 July 2016 12:00
		Re: How can I stop reverb howling on K 100? By: stevem on Sun, 31 July 2016 16:12
		Re: How can I stop reverb howling on K 100? By: stevem on Sun, 31 July 2016 16:14

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