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In Reply to: RE: "True" Mono Cartridges? posted by SpotcheckBilly12345 on August 27, 2016 at 08:16:39
I thought a true mono cartridge has no compliance in the vertical and would tear up a stereo record.
Is this true of a modern, so called "true mono cartridge"?
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
Follow Ups:
that a true mono cartridge might damage a stereo LP, but this thread is all about and only about playing mono LPs, so far as I can tell. The issue is whether a stereo cartridge used with the mono mode switch on a preamplifier can deliver all that mono has to offer, or not.
Lew, this is from a thread in a different forum that I think you were a part of.
"A true mono cartridge generates signal from horizontal motion, only. A stereo cartridge modified to become a mono cartridge will still respond to vertical motion. Why is this an important distinction? Even though a modified cartridge is supposed to suppress vertical signal by summing, bridging, coil alignment, etc it is still there."
So my question is whether of not a modern "mono" cartridge responds to vertical motion in any way?
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
"A true mono cartridge has only one coil and is designed to respond to lateral signals only. It does not respond to vertical signals. A stereo cartridge strapped or otherwise manipulated to become a mono cartridge still responds to vertical signals. The introduction of the vertical signal causes distortion and phase anomolies that are not fully canceled by summing the 2 signals. The anomolies are audible. That is why many consider a true mono cartridge (one coil only) to be superior to a stereo cartridge adapted to mono.
The Denon 102 is a unique cartridge. It has only one coil, thus only generates signal from lateral modulations, but the stylus has vertical compliance, ie- it responds to vertical grooves in the record. However no signal is created or generated from the vertical grooves. The cartridge was produced by Denon in the 60's for Japanese AM radio stations. The inclusion of vertical stylus compliance allowed the stations to play stereo records with a mono cartridge and not damage the grooves."
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
Thanks for quoting me !
Best,
Ross
You're welcome.
Thank you for writing it.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
was with trying to find out from reading manufacturer blurbs whether their "mono" cartridges are built the way you describe, such that they are not capable of responding to vertical deflection of the stylus, or not. This is why I quoted the Ortofon website, which on one hand defines what a "true mono" cartridge should do, and on the other hand tells us that one of their "true mono" cartridges (the Quintet Mono) is a stereo cartridge where the two channels are strapped internally.As far as I can tell a "mono"cartridge that is derived from a stereo cartridge by internal bridging of the two channels WILL be capable of responding to vertical movement in the groove; it depends upon phase cancellation effects to get rid of such voltages before outputting them, and it really should be no different from using a mono mode switch on a preamplifier. This may or may not be OK for getting the most out of a mono LP, which is another question.
And yada yada
Edits: 08/28/16
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