[BC] Achieving good S/N

[Milton R. Holladay Jr.]

That might have been the 750 or 751, but I don't recall ever being able to
hear the belt splice in the audio; It takes a lot to perturb 36 pounds in
rotation.
A later type belt was made of some sort of orange material; I devised a way
to splice them to fix breaks or stretching with a big-ol' soldering iron and
razor blade, usually as good as factory......
M
----- Original Message ----- 
From: "Rich Wood" <richwood at pobox.com>
To: "Broadcast Radio Mailing List" <broadcast at radiolists.net>
Sent: Sunday, January 01, 2006 11:18 AM
Subject: Re: [BC] Achieving good S/N


> ------ At 07:23 PM 12/31/2005, Milton R. Holladay Jr. wrote: -------
>
> >All of the 3 Fairchild models that I have, have only one motor.
> >SC ETV Radio had 4 of the EMTs when I was the supervisor there in the
early
> >80s. There were no problems with rumble or flutter. They had a rumble
null
> >pot that was in series with the motor condenser, to adjust the phase a
tad,
> >leading me to cognite that the size of the motor capacitor was somewhat
> >critical to smoothest operation. Could the ones you had have been a bit
off
> >value?.....
>
> If they're the ones we used at WJIB, Boston, the base was almost 3 ft
> on a side. Our rumble problem was where the belt was joined. It made
> a slight bump in the belt and would thump every time the bump went
> over the motor spindle. We'd buy several belts and use the one with
> the least thump. I would think, today, that you could mold a belt
> with no joint.
>
> Rich