[BC] Turntable arms

[Phil Alexander]

On 20 Jul 2005 at 1:38, Milton R. Holladay Jr. wrote:

> Yes, the two speed model with the speed change control sticking out of the
> top of the spindle..................

I was thinking of the RCA 70-D that had the 33/78 gearshift lever on the
outer edge of the platter. When it was running you could "hot" switch it
one way by catching the lever as the table went around - if you were
careful. <g> IIRC the converted TT's that had the second planetary for
45's had to have the lever in 78 and there was a knob on the top of
the deck on the corner opposite the 16" arm pivot that had to be turned
from 33-78 to 45 to unlock the second planetary which was actually the
same planetary as the 33-75 backward, IOW upside down. I was told this
was how RCA came up with 45 as the speed, because it would be easy to
convert the model 70 TT's using standard hardware.


Phil Alexander, CSRE, AMD
Broadcast Engineering Services and Technology 
(a Div. of Advanced Parts Corporation) 
Ph. (317) 335-2065   FAX (317) 335-9037





-- 
No virus found in this outgoing message.
Checked by AVG Anti-Virus.
Version: 7.0.323 / Virus Database: 267.9.2/52 - Release Date: 7/19/05