JMW 12.5 ZYX Cosmos azimuth setting


I have been exploring setting azimuth on my JMW 12.5 with a Fluke DMM, Cardas test LP and the (great) MF DVD.

I'm sure I'm doing everything right but have found I need to adjust the JMW azimuth ring to a surprising degree. If you can imagine that the two 'side screws' on the ring, which when in the neutral position, are at quarter to three (on the clock), my set-up has to shift to twenty to two.

I've double checked the TT level, made sure everything' tight and the cartridge alignment is accurate. And i've got the azimuth set within 3% so I'm pretty happy about that, but feel a bit uncomfortable seeing such necessary twist of the ring!

Has anybody had a similar experience with the ring setting?

Thanks

Peter

rennie_perth

Showing 2 responses by rennie_perth

Thanks for the feedback - I hadn't thought about the 'balancing knob' theory, but it seems to make sense as I need to make a major adjustment for little gain.

On the use of the counterweight; my 12.5 has a groove/channel cut in the back part of the arm tube for the c/weight locking screw, so I cant off-set it (it locks it into a central position). That's the most frustrating part, because all the commentary is about using that to set the azimuth.

I might see if I can remove those 'balancing knobs'
Thanks Stingreen. I have now removed the 'outrigger' fittings from the azimuth ring which makes it much more flexible it terms of adjustment.

With the outriggers in place I was struggling with the arm-lift getting in the way - not being able to twist the ring far enough. Now it's perfect - sound and balance.

I'd be interested if anybody else has tried their JMW sans outriggers. I think they'd be pleasantly surprised.