[78-L] Vertical cut records

[Don Chichester]

For those who might be interested, I wrote (the first?) article on vertical playback in Record Research Issue 47 (November 1962).  It may be seen at:
 
https://archive.org/stream/RecordResearch47/47#page/n3/mode/2up
 
Don Chichester
 
> To: 78-l at klickitat.78online.com
> Date: Mon, 5 Jan 2015 15:58:05 +0000
> From: rroscoe at mit.edu.invalid
> Subject: Re: [78-L] Vertical cut records
> 
> 
> 
> 
> -----Original Message-----
> From: 78-l-bounces at klickitat.78online.com [mailto:78-l-bounces at klickitat.78online.com] On Behalf Of Jeffrey Lichtman
> Sent: Sunday, January 04, 2015 9:27 PM
> To: 78-L Mail List
> Subject: Re: [78-L] Vertical cut records
> 
> While most of the ideas presented here were good and correct, tying together the positive outputs for both channels [hot leads] would be correct for LATERAL records, not vertical.  For vertical, tie together one hot lead  from one channel with one ground/negative lead from the other channel, and have it NOT be the ground lead that has a copper strap from the ground or negative side to the case of the cartridge.  Use the negative side of the channel that is not strapped to ground. [Not the case in all cartridges.]
> 
> Ron Roscoe
> 
> "You can also jumper the outputs of a stereo cartridge to make it produce a mono output. Whether it works for lateral or vertical records depends on how you connect the jumpers. For vertical records you would tie together the positive outputs for both channels (typically white and red), and the grounds for both channels (typically green and blue).
> 
> By the way, there are 78 cartridges that are pre-wired for mono playback. None of these tricks will work with this type of cartridge."
> 
> 
> On 1/4/2015 5:31 PM, Malcolm Rockwell wrote:
> > Doesn't your amp have a mono switch that sums both channels? That should
> > cut out a lot of the lateral component.
> >
> > *******
> >
> > On 1/4/2015 3:23 PM, Ken Matheson wrote:
> >> I acquired 2 old 78s. They look very good, nice and shiny,
> >> like they have not been played. One is a Pathe, No. 22227. . .
> >>
> >> Thanks
> >> Ken
> 
> -- 
>                         -        Jeff Lichtman
>                                  jeff at swazoo.com
>                                  Check out Swazoo Koolak Photography
>                                      at http://swazoo.com/
> 
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