Parallel? How do you set the VTA?

+1 Rockitman. I've thought the same thing ever since the Graham hit the market.
Brf, the USB microscope is a great tool as well for sure, and is on my to-buy list. I like some of the DinoLite models with measuring software, but they are around $300 so the purchase will have to wait.

I have a screw gauge that slips under the arm lift.
1/4 turn of the screw equates to 1/1000 of an inch.
I can hear 1/1000 of an inch like night and day.
In reality you are only getting near the zone with bubble levels.

But then what about the cutterhead angle, which varies by record.
So the only way is to listen and dial in each record and using dial calipers to measure and record the height for each record.

Any takers ?

Dear Frogman: Of course and agree with you: what will define where the tonearm will be parallel or not is at wich VTA/SRA the cartridge signal quality performance is the " best ".

Now, due that the analog medium/LP is so imperfect that VTA/SRA is changing every groove on playback as is changing VTF and overhang too.

That Fremer 92 degrees could means almost nothing because that could be only in theory but on playback always is changing. Ok, could be a point to start but nothing to " die for ".

My advise is to have 6-7 differnt LPs that we know in deep and that can help us as a testing tools to the cartridge/tonearm overall set up. These works have to be make it by ears. At the end our cartridge SRA set up can coincide with those 92 degrees but it is not important that that happen but that what we are hearing LP after LP has the best quality performance we can achieve in our audio system.

Unfortunatelly because the whole analog imperfections medium many subjects that gives us the theory can't be achieved during LP playback.

Regards and enjoy the music,
R.

Brf-
How does this paradigm deal with the different thickness of records? Within each record the stylus will rise and drop, how should we account for this change in sra?

We will never agree on a solution until we agree on what the target is. More complicating, a moving target everytime we change records.

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.