[BC] Achieving good S/N

[Milton R. Holladay Jr.]

The early Fairchild and RCA turntables had a worm drive down in the bottom
and vibration isolators in the shaft to the platter and elsewhere, so they
were pretty smooth. The early ERPI (W.E.) tables were made for theater sound
and had a separate motor drive  unit that sat on the floor nearby with a
speedometer-cable type drive to the table. I have a catologue sheet on a
later WE tt, but it only shows a drawing; (I've never actually seen a WE
tt.)

The heavy Fairchild tables _circa_1960 were the model 750 and employed belt
drive to the 36 pound platter (got a pair). They were a maintainance
headache in that the belt would break randomly and new belts only worked
well for a week or two and cost a small fortune.(751 was a 2 speed version)
With good belts, start-up was, amazingly, < 1/4 turn !
M
----- Original Message ----- 
From: "Steve" <shnewman at alaweb.com>
To: "Broadcast Radio Mailing List" <broadcast at radiolists.net>
Sent: Friday, December 30, 2005 6:31 PM
Subject: Re: [BC] Achieving good S/N


> Hi Dave:
>
> > KVIL-FM in Dallas used the Fairchild Limiter when they went on the air
in
> > 1961.  They also used those real heavy gear drive turntables.
>
>
> Talk about rumble! Remember (how could we forget) the QRK's? James Gabbert
> in San Francisco (KPEN eventually KIOI) mounted those in huge cases that
> were filled with tons of sand for damping. Worked. You couldn't hear
rumble
> from his QRK's. They were the 16" platter versions. I once owned two of
the
> 12" versions which I bought right out of the QRK garage in Fresno in 1966.
> Bodine motors. Heck, those were used as rewind and capstan motors in Ampex
> and other machines. Sure did start fast!
>
> Steve