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pulsating loud bass static sound [message #20620] Thu, 15 May 2014 15:11 Go to previous message
vintagefan is currently offline  vintagefan
Messages: 166
Registered: March 2014
Location: Dallas
Senior Member
Any ideas on this problem?

One of my K100C-8 4x10 amps started having a pulsating bassy static sound when I
turnd it on. It is quite louder than the guitar 's sound is. It started out less loud lasting 10 seconds, then louder and lasting up to a minute before it faded out.... But it began lasting longer. It pulsates even with teles and my Gibson
ES135 with humbuckers.....I originally just played a tele with a lot of treble 1meg tone pot with no problems from the amp. But when I played my Gibson ES135 with humbuckers, the amp began a loud pulsating bassy static sound which occurs everytime I turn the amp on and lasts a minute, even when playing a tele now. The pulsating bassy static sound occurs on powering on even with no guitar plugged in.

I took it to a tech 2 weeks ago. He's a tech who has worked on these back in the 70's. He powered it up today and he says it sounds quiet now with no pulsating bassy static sound. Could not being powered up for two weeks affect the quieting down of the pulsating bassy static sound? Any ideas?

Thanks.

[Updated on: Thu, 15 May 2014 15:13]

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