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Hoffman Amps Forum image Author Topic: 5f1 kit distortion, low volume having problem with kit build  (Read 2278 times)

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Offline leevc5

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5f1 kit distortion, low volume having problem with kit build
« on: April 28, 2016, 09:26:51 am »
I have checked all the wiring switched out the tubes and cannot figure out what is wrong. When I turn the volume control up I hit a spot at about 75% of the way up where a get a sort of squealing sound then no output after that. below that point I have output but distorted and very low volume.

 Any suggestions would be greatly appreciated.

 Lee

Offline shooter

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Re: 5f1 kit distortion, low volume having problem with kit build
« Reply #1 on: April 28, 2016, 11:22:48 am »
The squeal, *might* be fixable by swapping the OT tranny wires on the input side of the tranny.

The low volume distortion is where you *learn* troubleshooting :icon_biggrin:

Start with fresh eyes, unmolested schematic and layout, a sharp sharpie, chop-stick, and fresh meter batteries.  star at the beginning, verify all wires, connections etc, poke n prod wires, verify voltages, then you will find it, fix it and jam on!
Went Class C for efficiency

 


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