Parallel? How do you set the VTA?


Silly question, but how do you guys determine whether your tonearm is parallel to the record surface? I had my tonearm set up happily for months, but recently started messing around with the cartridge alignment and the VTA, and I'll be damned, but the folded index card method gets me nowhere now. Even with adjustments I keep getting the same visual effect. Happily my ear tells me when the setting is off, but as a base, how do you determine conclusively your tonearm is parallel? For reference, I have a VPI Classic. Thanks.
actusreus

Showing 5 responses by brf

200x usb microscopes with a focusing rail can be bought on ebay for less than $100. It takes some practice to get a serviceable image with a horizontal reference, but once obtained, you then overlay the image with protractor software to measure the stylus rack angle. Adjust the sra at the pivot point to obtain the recommended 92 degree sra. If you change the VTF, you will need to adjust the sra as the cantilever will flex thus changing the angle.
Zenblaster, it is all about the “best” compromise. You set the 92 degree sra for an average thickness, etc. Variance in record thickness, difference in cutting head angles, will affect the sra but not to the extent that it will significantly change the tonal balance of the cartridge. I would hazard a guess and say that 99% of all audiophiles do not adjust VTA to compensate for record variances. Also, some stylus tip are more sensitive to sra than others.
Don't use the armwand, use the headshell to determine level. Level is just the starting point, adjust by ear.
Use your computer word processor and print out a series of closely spaced lines (similar to an indexed card but more refined). Cut the paper to a manageable size and fold in the middle along one of the lines to create a 90 degree fold. Place the “L” shaped lined guide on the platter. Lower the tone arm onto the horizontal fold and align the head shell with the lines on the vertical plane. Since the cartridge is affixed to the head shell, you want to make sure the head shell is level. It does not matter if your arm tube is tapered or not. Once level, adjust by ear.
I can’t see adjusting VTA for every album either. What happens if you change your cartridge? You’ve got to start all over with each album. Not criticizing those who do adjust for each album…it’s just not for me