"Roy J. Tellason" wrote to "Tom Walker" (18 Apr 03  20:01:25)
 --- on the topic of "16 rpm LP"

 RJT> Tom Walker wrote in a message to Matt Mc_carthy:

 ->  RJT> How could you tell?  Would this require a different player?
 ->  RJT> From what I understand,  the original Edison players were also
 ->  RJT> that way...

 -> Yep, a different pickup cartridge is required.  The normal "home"
 -> type pickups have the coils mounted in the horizontal plane, and the
 -> output to the AMP is likely fed to a differential amplifier to
 -> cancel any vertical motion, as that would be considered "rumble",
 -> and less than desirable on a "home system".

 -> A "vertical cut" groove would be exactly the opposite.

 TW>  But a Stereo Cartridge which has the coils mounted at a 45
 TW> degrees to the left and right of Vertical would work after a
 TW> fashion.

 RJT> And,  if you wanted to go out and get one somewhere,  would you even
 RJT> be able to *find* a mono cartridge these days?

I think you only need reverse the connections to one channel of a stereo
cartridge. IIRC some older stereo preamps had a phase switch which I
think was used to achieve compatibility when playing mono records.

 Mike
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