I can describe everything, but why does this one disk not play when all my
other EDDs sound fine?
It's a vertical groove like all the other EDDs.
I have both the left and the right RCA pin plugs in a Y adapter, and the
cartridge is wired for vertical grooves.
This set-up works fine for all the other EDDs, but not this one.
The catalog number is 82187 L/R. The label is black and is an integral
part of the record, not a glued-on paper label.
On Wed, Nov 6, 2019 at 7:18 PM Paul Stamler <[log in to unmask]> wrote:
> On 11/6/2019 2:34 PM, 6295LARGE . wrote:
> > Hello everyone.
> > I don't understand why I can get *great sound* from one Edison Diamond
> > and practically *NO SOUND* from another, and they're both in good
> > I've got the cartridge wired correctly with a 3.5FCR stylus and the
> > from the Shure M44-cartridge is "monofied" before going into the stereo
> > preamp.
> How, exactly, have you "monofied" the cartridge connections? The usual
> technique of strapping a stereo cartridge for plsying mono records is to
> connect the coils of the two channels in parallel. Specifically:
> L hot connected to R hot and thence to preamp input hot
> L ground connected to R ground. and thence to preamp input ground.
> This combines the two channels of a lateral-groove disc (which mnost 78s
> are) properly. A lot of folks do this by using a Y-connector;
> Two RCA female jacks > 1 RCA male plug, which goes into the preamp input.
> If you play a disc with vertically-cut grooves (like most Diamond
> Discs), the signal from the L channel will come out in reverse polarity
> to the signal from the R channel -- when the voltage from the L channel
> goes positive, the voltage from the R channel goes negative by an
> approximately equal amount -- and when you combine these two signals by
> strapping the cartridge for mono as described above, the positive
> excursions of the L channel are cancelled by the negative excursions of
> the R channel, and you're left with little or no signal. That's the
> *normal* condition when playing Diamond Discs with a strapped-for-mono
> cartridge; the thing that's hard to understand is why you had some discs
> that played properly (plenty of signal), As others have mentioned, a
> very few Diamond Discs were produced with lateral-cut groove -- maybe
> you lucked into some of those.
> Please verify that the above description corresponds to the way you
> "monofied" the wiring, and we'll go from there.
> Paul Stamler
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