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Post subject: found bad resisters in a prosonic amp are they all important
Posted: Sat Feb 26, 2011 4:06 pm
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which resisters should i worry about or do i have to replace all of them


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Post subject: Re: found bad resisters in a prosonic amp are they all impor
Posted: Sat Feb 26, 2011 10:35 pm
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Hi drummerman dan,

Which resistors are bad?

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Post subject: Re: found bad resisters in a prosonic amp are they all impor
Posted: Thu Mar 03, 2011 6:21 pm
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one was in the power circuit 470 ohm 1 watt that was on the tube socket itself that one i replaced the others are in the pre amp section one is in the mid range and i have having trouble tracing the others but they are all on that same turret board i still have much noise in the reverb


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Post subject: Re: found bad resisters in a prosonic amp are they all impor
Posted: Fri Mar 04, 2011 1:36 am
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Sounds like the 470 ohm maybe the grid resistor for one output tube (R305 or R306). Are you replacing resistors because of the noise in the reverb, or because the resistors were bad? What are you trying to accomplish?

If you have crackling or noise in the reverb, it could be R39 and R41 Plate resistors (100K), or the V4 and/or V5 tubes causing noise.

http://support.fender.com/schematics/guitar_amplifiers/Prosonic_schematic.pdf

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Post subject: Re: found bad resisters in a prosonic amp are they all impor
Posted: Sat Mar 05, 2011 5:30 pm
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I replaced the resistor because it was bad that did not help the noise in the reverb i replaced the v4 tube but not the v5 i will try that next thank you i already have the scematic thanks i will also those plates


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