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Schematic for guitar amplifier - Audio & Video Receivers

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You didn't mention the make and model of the guitar amp, so I'll leave a link for several amps:

http://www.prowessamplifiers.com/schematics/

Enjoy!

Posted on Nov 25, 2008

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Hi having trouble when i plug guitar or mic into the neo. when i raise the trim to hear the input, the re is a big buzzing sound that just wont go away... any ideas?


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I have a "peavey ultra 410" guitar amplifier. it has been sitting in the garage for several years, and there is no power when plugged in. The amplifier is all tube (preamp and amp). My question is this; if...


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MY FENDER GUITAR AMPLIFIER IS MAKING A HUMMING BUZZING NOISE


Not sure yet, but before considering a fault with the amp, does it only make this humming noise when not plugged into the guitar? I am thinking that the cable might be faulty.

If it while the cable is plugged in the guitar, does the humming disappear when you turn the volume control(s) down on the guitar? I am thinking that one or pickups may be faulty.

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Beeing an old amateur radio technician, that is, working with sophisticated receivers don´t see any problem to help you.
It is my oopinion however that unless I can have a copy of the complete schematic diagram it will be impossibleto start giving you ideas
Can you provide me a coopy of the schematic diagram
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Thank you inadvance,
regards from
paulobelardi@gmail.com

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I repaired a classic 50 recently and the problem was a bad solder connection on the main input jack. You may also want to have the tubes tested.

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I do this stuff but Vermont might be to far.

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