HUM IN SB-303

[rayfri]

Tubes in an SB 303????    HMMMMM  I've been robbed..!!!!  I just
looked inside my 303 and there are none   HI HI.
ray  wa7itz

AL ROYCE wrote:

>
>
> You could also sub the tubes one at a time. I have seen tube/s cause
> the same problem. Here is one for everyone. I have a GR series
> receiver which has a hum. I have tried evey thing. The only thing that
> works is to ground the grid in the audio amplifier. The hum is being
> picked up by the grid. There is no AC on the output of the power
> supplies.
>
> Al KE6CPS
>
>
>
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