Bassman aa864 guitar channel hum

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Bassman aa864 guitar channel hum

Postby spoontex » 30 Sep 2017, 08:27

Hello,

I've a Bassman aa864 and the guitar channel make hum thru the speaker and I have'nt any guitar sound. The hum interacts with the volumen pot, if I pull of the V3 valve the hum disapear. The bass channel Works well.

I tried to change valves, but the hum persist.

Any idea?

Thanks.
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Re: Bassman aa864 guitar channel hum

Postby Manfred » 30 Sep 2017, 12:22

Does the hum appear with plugged in guitar or unplugged or in each case.

Perhaps, the input jack is defective over the years.
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Re: Bassman aa864 guitar channel hum

Postby spoontex » 30 Sep 2017, 12:35

Solved!!

Pin 2 of v3 short with heaters. Yeah!!

Thanks!
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