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The recording machines were just the same RCA Electrolas with a weight
slipped over the top of the horseshoe reproducer.  The angle would be
the same as any other player, maybe 15 degrees off vertical.  I don't
know anythinga about a yellow shaft needle, only the red.  The
instructions only mention the red for both recording and playback.

Mike Biel  [log in to unmask]   


From: "Doug Pomeroy" <[log in to unmask]>
> Does anyone know the tracking angle of the
> embossing needle on the RCA Home Recording
> machine? I would imagine the ideal would be
> perfectly perpendicular the the disc surface.
> 
> I acquired two needles, one has a yellow
> shaft and one has a red shaft. The yellow is
> has a much larger tip. What was the reason
> for the two different sizes - was one for recording
> and the other playback?
> 
> Thanks for any help.
> 
> Doug Pomeroy
> POMEROY AUDIO
> Audio Restoration & Mastering Services
> Transfers of metal masters, lacquers,
> shellac and vinyl discs & tapes.
> 193 Baltic St
> Brooklyn, NY 11201-6173
> (718) 855-2650
> 
> If we are the stuff that dreams are made of, what's all that other 
> stuff?
>