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Tue, 03/25/2014 - 09:31
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Musicman 65 reverb power problem?

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tayloredgifts@aol.com (guitarman)
Username: guitarman

Registered: 10-2007
Posted on Monday, October 29, 2007 - 03:26 pm:   
hello, problem is loud (humm) without guitar plugged in. volume control makes no difference. (can hear slight guitar sound in back of humm) when plugged in. then after 1 min i lose power to tubes (then no nothing) . any ideas? thanks
Mike Kaus (mm210)
Username: mm210

Registered: 05-2006
Posted on Tuesday, October 30, 2007 - 04:14 am:   
Does the fuse blow or just go out? When it cools off, does it come back on? Also, which chassis(amp) are we talking about? With or without PI tube.
tayloredgifts@aol.com (guitarman)
Username: guitarman

Registered: 10-2007
Posted on Tuesday, October 30, 2007 - 08:51 am:   
fuse does not blow .it does come back on after ten mins or so. it is a 65 reverb head .that is all the info i have . thank you
Giorgio (giorgio)
Username: giorgio

Registered: 07-2007
Posted on Tuesday, October 30, 2007 - 03:08 pm:   
Have you replaced old electrolytic caps?
Mike Kaus (mm210)
Username: mm210

Registered: 05-2006
Posted on Wednesday, October 31, 2007 - 04:28 am:   
I'm going to go with bad caps OR a bad connection at one of the heater wires. Get's hot, tubes go out. OR PS transformer taking a whizz.
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