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Post subject: help w/ fender blues jr NOS popping when warming up
Posted: Mon Aug 02, 2010 12:19 am
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I have a Fender Blues jr NOS that makes loud popping and cracking sounds when for the first minute or two after being turned on. I thought it was a cord or guitar issue, but still made noise when not plugged in.

It doesn't seem to make the loud popping noise after its been warmed up and everything.

Any ideas. Help would be very appreciated.

Thanks.


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Posted: Mon Aug 02, 2010 12:49 am
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Joined: Wed Mar 31, 2010 12:48 am
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Location: Tombstone Territory
I'm thinking preamp-related, likely a tube that is heading south.

Try swapping a known good 12AX7A alternatively into each of the V1, V2, and V3 positions to determine if that's indeed the problem.

A wonky tube will often clear up as it warms to operating temperature whereas a tired component on the board (or the board itself) generally makes the symptoms worse as it heats.

Best of luck, HTH

Arjay

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"Here's why reliability is job one: A great sounding amp that breaks down goes from being a favorite piece of gear to a useless piece of crap in less time than it takes to read this sentence." -- BRUCE ZINKY


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Posted: Mon Aug 02, 2010 8:41 am
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I'll try that. Thanks!


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