[78-L] turntable hum mystery

[David Breneman]

--- On Thu, 11/8/12, neechevoneeznayou at gmail.com <neechevoneeznayou at gmail.com> wrote:


> Later I was thinking I was hearing much hum from the records. Surely 
> they didn't record that much hum in so many records did they? Upon 
> further investigation, it appears not to be from the records. It is
> only 
> when the table is on and the stylus in contact with the record. 
> Lift the 
> stylus even the tiniest bit and the hum goes away. Turn the thing off, 
> even with the stylus on the record, and the hum goes away.

Sounds to me like a vibration.  Is is possible to set the
stylus down so it touches the turntable base while the
turntable is running?  I had a jukebox that was exhibiting 
this exact same problem.  It sounded for all the world like
a 60 Hz leak from a bad rectifier, but it was rumble.