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Cartridge, Compliance, try what in my JVC UA-7082 Arm?

So, what to try in my new JVC UA-7082 Tonearm when it comes? (effective length 282mm) (11-1/8")

Guidelines? Advice? (I never bothered learning about compliance, I guess now's the time).

Anyone know the Mass of the UA-7082 Tonearm without a cartridge _______?
.....................................

Self Imposed Restrictions:

High Output, 4.0mV or more (to avoid tube preamp hum zone until it's repaired).

MM Only. (I am fundamentally opposed to MC pre-pre amp, as well as needing high output).


.......................................

Motley Crew On Hand:

4 headshells, none special

Shure MicroRidge Stylus and V15VxMR Cartridge

Shure V15VMR Cartridge (no stylus, I gave it a dirty look and it broke, horribly brittle shaft)

Shure 97xe Elliptical Stylus and Cartridge (despite it's low pedigree it's my current favorite).

Shure N78S Stylus (fits 97xe) (I did not inherit the 78's someone threatened me with).

Shure M44E Stylus and Cartridge

Audio Technica MicroLine AT440ML OOC Stylus and Cartridge

Audio Technica AT7000 body, no stylus

Audio Technica ATP-2

Audio Technica Series VIII P mount 

Audio Technica ___? Came with the AT120 TT (tracks 2.5g, I never used it) 

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It's a busy time, it doesn't get here till mid Jan, so theirs time to research.

Thanks in advance, Elliott






elliottbnewcombjr

Showing 2 responses by mijostyn

mijostyn's avatar
mijostyn
8,224 posts
 
Hi Elliot, You are making life difficult. The Japanese mostly design their arms around stiff moving coil cartridges. My guess is the arm has an effective mass somewhere between 15 and 20 grams which is too heavy for many moving magnet cartridges like the Ortofon 2M series. The Sound Smith Zephyr MK III is a low compliance high output cartridge that would work well in your arm. Down the line is the Irox Blue. These cartridges have a compliance of 10 u/mN which is perfect for your arm. You want something between 10 and 15 u/mN. The Clearaudio MM's are 15 u/mN.  Another important factor is the weight of the cartridge. Here is a graph that compares total effective mass (tonearm and cartridge) to compliance.
https://www.ortofon.com/support/support-hifi/resonance-frequency/
Just add the weight of the cartridge to the effective mass of the arm for the total effective mass and look where it falls on the graph. I try to shoot for a resonance frequency between 8 and 10 Hz. I think the bass is better
if you can get it down there. 

Mike

mijostyn's avatar
mijostyn
8,224 posts
 
Anyone notice how little titanium is used in tonearms and cantilevers?
There is a good reason for this. It rings like a bell. Actually, you can make bells with it. I have a classic Merlin Ti bike and every time you hit a bump big enough and a cable slaps the frame, TINGGGGG! It is also sort of rubbery. You will never see it in a bike fork because it results in very squishy handling. 
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