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65.92.27.3
In Reply to: RE: I calculated 90.4-degrees... posted by John Elison on June 25, 2017 at 21:17:48
So it's safe to say that my calculations are close enough which is not really good because the arm is as high as it gets and no more room left for adjustments. unless i shim the headshell side...?
here's what the whole thing looks like
Thanks John!
Follow Ups:
parallel to the record surface while the tonearm is at such an obvious tilt. I know nothing about your tonearm but that doesn't make sense to me. Perhaps its just an optical illusion.
Gary
I think it might be a good idea to shim the cartridge so that you can keep your tonearm level. After all, you're still not close to the desired 92-degrees and you can't go any higher at the tonearm base. Therefore, I would recommend shimming the cartridge to get SRA of 92-degrees with a level tonearm. If for some odd reason it doesn't sound good you can always remove the shims.
The pictures below show what your stylus should look like with the correct 92-degree SRA. It's also okay to go a little higher to about 92.2-degrees because the frictional pull from a spinning LP will reduce SRA slightly.
Good luck,
John Elison
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Is there a source to buy such shims. so far google is not pointing any
I have two headshell shims. If you need them let me know and I will mail them to you!
I don't know of a source for shims. You might have to get creative.
I have a UP-4 and have never set my arm tilting so much. Maybe its due to differences in carts, but none of my mm's would sound good with such a downward tilt. Seems pretty extreme in the pic.
Hi Rick,
well it is extreme and that's what got me doubting if i was measuring right. To be honest the SRA is as close as I get but I keep telling myself this can't be right...
Hi, Whitesnake,
Just checking the obvious, but are you sure the tracking force is correct?
Regards,
Tom
PS: Nice 'table. '-) I see you leave the spring towers exposed. I prefer the look of the towers that way myself.
Hi Tom,
yes I'm tracking at 2gr validated by a digital scale. As u see the bug of doubting everything I know is itching again lol.
The only cartridge shims I have ever even seen were constructed of simple plastic , little squared off "C" shapes, included with cart purchase. The material felt and looked very much like the clear plastic material used on toothbrush and other packaging, but thinner and dark tinted. Weight and stability were the obvious goals. perhaps some kind of sonic isolation could be incorporated, once the correct shim height was known.
Glad you guys have such good technical understandings, although It does make me look bad in comparison. Thank goodness no chicks hang around here, so no worries. I certainly don't mind the illumination.
I happen to enjoy that same table design and if it were me, I would be sliding the arm post, up or down, after making a tattle tale mark, to see what happens. With audio illusions, it is easy to lose your place , and the mark at home base is helpful, at times.
Of course, I fully realize my "hey, dat sounds good" approach is not your deal, in that the overhang changes along with any height change. And you know what they say, without correct overhang, you ain't nothin'.
If I had a desire to experiment, I would mark the home position, start with a level arm, use a radical tip shape, to make it a more off , on, effect, and a cart that can handle being part of an audio experiment, i.e., not collapse prone.
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