Thanks - I will check that out. I know that while I was working on it
I was using the AC adapter. I don't remember whether or not I ran it
on batteries. Typically I would have tried that, as using it battery
operated is my main interest, but maybe I didn't. thanks for writing
back! witnerd40

--- In diy_audio_tweaks@yahoogroups.com, Larry Owens <larryo@...> wrote:
>
> Sounds like a power supply filter cap has gone away.
>
> The schematic shows a connection for an external AC adapter, which
> presumably outputs a DC voltage. That's where I would suspect the
> troublesome part to be. What happens when you run it on batteries
> alone w/o the AC adapter connected?
>
> Cheers,
> LarryO
>
>
> At 11:21 AM 3/27/2008, you wrote:
>
> >I have recently brought a Singer portable record player, which uses AC
> >current or batteries, back from the dead. The last thing I am hoping
> >to do is eliminate the hum in both channels. I'm guessing (based on
> >my INCREDIBLE knowledge of electronics....NOT!) that it could be
> >capacitors, because every seems to note how they go bad. Whatever the
> >source of the problem, I cannot read a schematic and certainly can't
> >diagnose it.
> >
> >So: Here is a photo of the schematic:
>
><http://i253.photobucket.com/albums/hh46/eidling/singerHE-2220schematic.jpg>htt\
p://i253.photobucket.com/albums/hh46/eidling/singerHE-2220schematic.jpg
> >
> >And here is a photo of the insides of the unit:
>
><http://i253.photobucket.com/albums/hh46/eidling/blaupunktinside.jpg>http://i25\
3.photobucket.com/albums/hh46/eidling/blaupunktinside.jpg
> >
> >The hum is there even when the volume is all the way down, if that's a
> >clue.
> >
> >I would appreciate any help you DIY experts can give me. Many thanks!!
>