10 inch 3D deterioration

10 inch 3D deterioration

Postby steveo » Sat Nov 24, 2018 1:29 pm

One channel in my phono rig has gone out. Amp? No; CD has both channels. Phono stage? No; tried two different stages and two different sets of interconnects from table (Prime) to phono stage.

So I decided to check the tonearm wire connections to cartridge, and it was then that I noticed an oily substance around the base of the bell and on parts of the counterweight shaft. The oily substance had also dripped onto the meta dog-leg. I also noticed soft blisters on the bell. Oy vey!
It never gets excessively hot in the house and the table is away from windows.

HELP
VPI Prime
Ortofon Cadenza Bronze
Audio Technica ART-7
Pass Labs XP-17 phono stage
Cary Audio 360-SACD
Cary Audio SLI-80 F1 Direct-coupled
Thiel CS 2.2 Loudspeakers
Audioquest Colorado/Columbia interconnects
Radio Shack 12 gauge zip cord speaker cable
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Re: 10 inch 3D deterioration

Postby jonathanb » Sat Nov 24, 2018 1:45 pm

Contact VPI and they'll likely swap out the arm for you.
Prime Signature #9 | 10" 3DR/VdH RG-8 | 10" 3DR/Transfiguration Phoenix S | 10" 3D/VAS Nova Mono | Aurorasound ViDA | Gryphon XT MC | Gryphon M100 (x2) | Evolution Acoustics MicroOne | Morrow and Gryphon cables
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Re: 10 inch 3D deterioration

Postby teenage diplomat » Sat Nov 24, 2018 11:02 pm

Steveo, it sounds like you have the same problem I had, and posted on a couple of weeks ago: a crying 3D arm. VPI is aware of the problem (some 3D arms weren't completely cured, leaving some residual fluid in the armtubes). They swapped mine, and I sure if you're having the same issue, they will do right by you. Call Marc at VPI. Good Luck!

PS - How do you like your ART 7? I've been using one for a couple of years, and love it on my HRX/12" Fatboy.
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Re: 10 inch 3D deterioration

Postby steveo » Sun Nov 25, 2018 12:01 am

Teenage Diplomat:
Yes, I recall reading your post about the fatboy.
I was thinking tonight: how could a "crying" 3D arm cause one channel to go out (see my post for details)?
Is there a way to check the tonearm wires' integrity with a volt-ohm meter?

I love the ART-7. Originally heard it on John Elison's SOTA table. Bought his back-up art-7.

Didn't you buy an ART-1000?
VPI Prime
Ortofon Cadenza Bronze
Audio Technica ART-7
Pass Labs XP-17 phono stage
Cary Audio 360-SACD
Cary Audio SLI-80 F1 Direct-coupled
Thiel CS 2.2 Loudspeakers
Audioquest Colorado/Columbia interconnects
Radio Shack 12 gauge zip cord speaker cable
steveo
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Joined: Thu Jun 25, 2015 4:56 pm

Re: 10 inch 3D deterioration

Postby Brf » Sun Nov 25, 2018 8:13 am

steveo wrote:Teenage Diplomat:
Yes, I recall reading your post about the fatboy.
I was thinking tonight: how could a "crying" 3D arm cause one channel to go out (see my post for details)?
Is there a way to check the tonearm wires' integrity with a volt-ohm meter?

I love the ART-7. Originally heard it on John Elison's SOTA table. Bought his back-up art-7.

Didn't you buy an ART-1000?


Yes, use your volt meter set to test continuity

https://www.fluke.com/en-ca/learn/best-practices/test-tools-basics/digital-multimeters/how-to-test-for-continuity-with-a-digital-multimeter
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Re: 10 inch 3D deterioration

Postby Jprod » Sun Nov 25, 2018 10:33 am

They swapped mine out as well. Marc helped me out and was awesome! Please contact them Monday and I am sure they will make it right.
VPI Prime with ortofon 2m black, Manley Chinook phono preamp, Wyred4sound STP-SE preamp, parasound halo a21 amp, Ascend acoustics tower speakers with RAAL ribbon tweeters, audio sensibility signature cables
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Re: 10 inch 3D deterioration

Postby steveo » Sun Nov 25, 2018 11:16 pm

BRF: how do I put the test lead from the multimiter on the lemo connector at the end of the tonearm wire? I guess I
can hook up the arm to the junction box and put a lead on the inside or outside of a phono jack?
VPI Prime
Ortofon Cadenza Bronze
Audio Technica ART-7
Pass Labs XP-17 phono stage
Cary Audio 360-SACD
Cary Audio SLI-80 F1 Direct-coupled
Thiel CS 2.2 Loudspeakers
Audioquest Colorado/Columbia interconnects
Radio Shack 12 gauge zip cord speaker cable
steveo
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Posts: 55
Joined: Thu Jun 25, 2015 4:56 pm

Re: 10 inch 3D deterioration

Postby Brf » Mon Nov 26, 2018 8:29 am

steveo wrote:BRF: how do I put the test lead from the multimiter on the lemo connector at the end of the tonearm wire? I guess I
can hook up the arm to the junction box and put a lead on the inside or outside of a phono jack?


Plug the lemo connector into the junction box and test the tonearm clip wires to the rca jack as noted below

White (L+) to Left RCA jack inner connector
Blue (L-) to Left RCA jack outer connector
Red (R+) to Right RCA jack inner connector
Green (R-) to Right RCA jack outer connector
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Re: 10 inch 3D deterioration

Postby steveo » Mon Nov 26, 2018 2:26 pm

Thanks much BRF.
VPI Prime
Ortofon Cadenza Bronze
Audio Technica ART-7
Pass Labs XP-17 phono stage
Cary Audio 360-SACD
Cary Audio SLI-80 F1 Direct-coupled
Thiel CS 2.2 Loudspeakers
Audioquest Colorado/Columbia interconnects
Radio Shack 12 gauge zip cord speaker cable
steveo
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Posts: 55
Joined: Thu Jun 25, 2015 4:56 pm

Re: 10 inch 3D deterioration

Postby steveo » Tue Nov 27, 2018 11:36 am

With a multimeter checked:
the tonearm wire/junction box: good
The interconnects: good
Then checked the cartridge pins: one channel reads 12 ohms, the other 1 ohm. My ART-7 is bad. Terrible.
What would cause these ohm readings? If a coil has broken, wouldn't you get an ohm reading of infinity?

Marc is fixing my "weeping" 3D arm problem. Amazingly fast response from him.
VPI Prime
Ortofon Cadenza Bronze
Audio Technica ART-7
Pass Labs XP-17 phono stage
Cary Audio 360-SACD
Cary Audio SLI-80 F1 Direct-coupled
Thiel CS 2.2 Loudspeakers
Audioquest Colorado/Columbia interconnects
Radio Shack 12 gauge zip cord speaker cable
steveo
Member
 
Posts: 55
Joined: Thu Jun 25, 2015 4:56 pm


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