Using the VPI threaded clamp and azimuth change


I am using the VPI threaded delrin clamp that came with my classic 1. It is stated that the threaded clamp is to be used in conjunction with the rubber spindle washer. When it is used this way, it seems like it would negatively affect the azimuth setting. When you screw down the clamp and tighten it against the rubber washer, it does force the outer edge of the LP downward to touch the platter. This causes the LP to have a slight downward dish appearance. When I have set my azimuth on a level surface, does this not cause the azimuth to be out of alignment? Do I need to set my azimuth canted a bit to the outside of the platter to compensate for this effect? How are you VPI users adjusting for this?
andyprice44
If you are clamping your disks you can easily "test" that you've got the tension correct by simply tapping your fingernail against the record edge. You will immediately hear if the record is making good solid contact with the platter or if it is too loosely clamped or too tightly clamped and dishing up a bit.

I used a fozgo on mine with the clamp on and have had no issues.
RE"Using an angle protractor only assumes that the diamond is "perfectly" aligned on the cantilever."
I set mine the way that Harry instructs, the only thing that I add is a quantitative factor, that is a measurement, which is both repeatable and reproducible. In this case using your ears results in to many variables, e.g. how tired you are, state of mind and all kinds of stuff like that. Even if you adjust it for your ears, the result will be good for only those records that were used to set it. Apparently the method that Harry chose to set the alignment works, because the table sounds great with a variety of records not just a chosen few.
Good point, Macster. My system positively sounds different nearly every time I listen to it, without touching a thing. I've long come to realize the person's state of mind, influenced by a variety of physiological and psychological factors, has a great deal to do with the way the sound is perceived, experienced, and processed. I think this is way too often ignored in discussions on here.
I am quite sure I am using my washer and clamp in the correct manner. It still does, and will continue to dish the record every time you tighten it down. It is physically impossible for it to be level when it has this washer acting as a spacer between the record and the platter. I will agree that the clamp, when used in combination with the vpi washer is very effective at removing small warps in records. I have ordered a grungebuster washer from herbies audio that is half as thick as the stock vpi washer. It also has the same outside diameter as well as spindle hole diameter as the VPI stock washer. I will use the herbies washer for the majority of my LPs. When I do have an occasion where I want to play a slightly warped LP, I will then use the VPI washer. Having two different size washers is going to be very useful. I will report back later when I get a chance to try the thinner herbies washer. I am hoping it will keep the record completely flat to the platter when the record isn't warped to begin with. I should have it by middle of next week. Stay tuned.

Andy
The VPI method of setting azimuth will allow you to realize about 85% of the cartridge's potential. Most people are satisfied with 85%. For those who want the last 15% of performance, you need to fine tune the azimuth setting by ear as most diamonds are not perfectly affixed to the cantilever.

Just like the VPI jig, it will get you close, but there are better cartridge alignment protractors that will give you better alignment.