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In Reply to: Re: What do you mean "back the cartridge up a tiny bit" ? posted by mosin on September 17, 2006 at 08:35:46:
I also tried a Stevenson alignment gauge from Vinyl Engine that was meant to work with Regas. I come up with the same result. I still need to back the cartridge up a bit, to get the stylus to sit right on the crossmarks on the grid. There is no more room in the headshell slots to do this. I want to do this right. I have a weird feeling someone will say something here and I will figure it out.
Follow Ups:
Slot the tonearm mounting hole a couple of millimeters. The base should still cover it.
Before going the Dremmel tool route, are you clear about setting the effectve arm length? This is the length from the horizontal pivot point (as I recall, it is the "X" you mentioned earlier) to the stylus tip. Be sure you cannot get this where you want it before you (very carefully)lengthen the headshell slots with the Dremmel.Then, be sure that you've mounted the arm the proper distance from the spindle center, which you can indeed measure as you've suggested, given the proper tools.
It goes without saying (I hope) that if you can correctly set both effective arm length and pivot to spindle distance, then you are home free.
IF you wind up using a Dremmel, be sure to keep TOTAL control over the grit you'll generate while grinding. It is a royal PITA if you let it get away anywhere near the TT. And, of course, keep the cartridge well away from the work/dust until you've got everything totally clean.
As an alternative, you can use a small file, like a jewler's file; but you still have to control the debris, and you have to be much more careful about twisting the arm while you hold it while filing.
The arm is mounted where the manufacturer mounted it.Not all cartridges are of the same dimensions, some are longer some are shorter.
The headshell slots are of a limited length.
Some cartridges may just be too long.
Not everything in analogue hifi "fits" together. If it doesn't fit don't use it.
In this case he can use a different alignment which is not what the arm was designed for but given the length of the cartridge it works.
Well, you are certainly pointing out the safest alternative, for the average guy.But he wants to use his Ultra 500, and I did lengthen the slots in my own RB300 (with a Dremmel) and it worked out fine.
OTOH, and caveat: I have used such tools professionally for almost 40 years, as part of my profession (builder).
AND, I've known and read posts from many folks who have trashed Rega arms while attempting to "upgrade" them.
SO: all the usual warnings apply.
Not for Klutz.
Best regards,
Paul S
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