HUM! Grundig TR 807
 

I was at a flea market recently and came across a Grundig TR 807, which
I bought for $20 so I would have something to play with some evenings.
The problem I have is a VERY loud hum, *both* in AC *and* DC power
modes. It brings in some stations even with using just the collapsible
antenna on the radio, so maybe it is worth salvaging-- but I have no
idea how to get around that hum.

ANY suggestions on how to fix it would be extremely appreciated.

Thanks-
Scott Anderson

BTW, I have read practically all of the previous posts to this group
about receiver hum, so I guess I need need to be more specific and ask
further if anyone has any experience with this model (Grundig TR 807)
radio *in particular* in regard to hum. I've tried moving it around,
taking it other places, etc., so now I'm thinking defective
component... again, *any* info would be great.

wrote:
I was at a flea market recently and came across a Grundig TR 807, which
I bought for $20 so I would have something to play with some evenings.
The problem I have is a VERY loud hum, *both* in AC *and* DC power
modes. It brings in some stations even with using just the collapsible
antenna on the radio, so maybe it is worth salvaging-- but I have no
idea how to get around that hum.

ANY suggestions on how to fix it would be extremely appreciated.

Thanks-
Scott Anderson

You need a schematic, and check any capacitor going from the audio or
IF amplifier stages to ground...anyone one of these bypass capacitors
is bad, and you get the hum.

Joe Yuna