2. analog
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What LPs do you use for VTA adjustment

Hi. I'm a newbie to this forum, and also to VTA adjustment. Been making GROSS changes to my system over the past couple of weeks, which has resulted in my getting an SME V arm to replace the RB300 on my Voyd Valdi TT, at least for now. Now for the first time, I have an arm with adjustments.

My system was optimised to my budget in the mid 80s, during my TAN (The Audiophile Network - any members here?) days: Voyd TT, British/Musical Fidelity MVT preamp, 4 MA-50 poweramps (mono 50w Class A), Rogers Studio 1a speakers vertically bi-amped, Kimber PBJ and 4TC. My current cartridge is an original Vdh MC10. The only things that have changed over the years have been cartridges and CD players.

Been playing with the HFNRR test record for tracking and anti skating adjustments. Trying to figure out what all the fuss is about VTA. The 3 records I've tried so far are Ella & Louis "Together Again" MSFL Mono, Patricia Barber "Modern Cool" MSFL, and Air "Walkie Talkie". Other than making the cartridge mistrack when the rear of the arm got too low, I'm not sure if I've honed in on the sound changes. I'm probably being overwhelmed by how good it sounds relative to the RB300, especially in the bass.

Am i right in saying its not just VTA, but a combo of VTA and VTF that needs to be adjusted? When the rear of the arm is low, more weight makes it track again.

Can you guys/gals (if any here) recommend records and tracks that YOU use for VTA setup, and what you listen for.

Right now, with the stylus in the leadout groove, using the SME V ruler to the center line on the arm, front of the arm is at the trackout groove is 1cm above the LP, rear of the arm just after the leadin groove is 0.9cm - so rear is appx 1mm lower. Anyone have or remember what setting they use on the VdH MC10? VTF at 1.8 gms.

Any volunteers in Stamford, CT that want to lend me their ears?

Thanks, Samir.
gofast
john_tracy
341 posts
 
"On my Shelter 901 changing arm height by .04mm or less makes the difference between being in this sweet spot or not." Doug, do you set the VTA for each record in your collection? 0.04mm is 0.002". I measured the thickness of some of my records last night and they all varied more than 0.002". If you do set your VTA for each record you are more of an analog slave than I. very best regards, JT
dougdeacon
3,338 posts
 
Hi JT,
We are indeed shackled to analog! We set VTA for each record, or at least each change in record label and/or thickness. Even with a clutzy Rega style arm it only takes about 30 seconds. Fine tuning can usually be done with our VTF-on-the-fly mod.

There's even more to it than record thickness. For much of the LP era, different labels cut their lacquers using different cutting stylus angles. There was no standard. Even records of identical thickness may need different playback angles.

We're building a list of labels, eras and LP weights (as a proxy for thickness) along with our optimal VTA setting for each. It's become second nature to look up a setting and dial it in before cueing the arm.

Slavishly,
Doug
audiofankj
373 posts
 
Hi Doug,

When you have the list complete, or nearing completion let us know. I think that information would seem quite helpful and valuable! As a newbie to learning to dial in VTA as well as VTF it will be nice to know a certain "generality" of a said label or era, etc.

Best Regards.
dougdeacon
3,338 posts
 
Audiofankj,
I'd be perfectly willing to share my list of course, though it might be of marginal utility. All I've recorded for the VTA data point is the relative position of the mark on my Expressimo VTA collar, e. g., 7:30 or 9:45 or whatever. Unless you have the same VTA collar it would be nearly meaningless. I suppose it would give some sense of relative arm heights for different records.

Yesterday we hit a new low ;-) while playing a record on the Tudor label. (Anybody ever hear of them? This is the only one I've ever seen.) The record wasn't outrageously thin or light, about 120g IIRC, but the optimal arm height was .25mm lower than any other record I've played. This is a HUGE adjustment. It took me 5 or 6 tries to find the right spot, I couldn't believe how low I was having to go. Tudor must have cut their lacquers at a much lower angle than most labels.
4yanx
1,576 posts
 
One thing nice about my Graham 2.2 is that it has a graduated scale from which to take reference points and allow fine tuning while retaining the ability to get back to square one...with a vernier scale on the adjusting knob which allows fine-tuning the VTA in increments of 0.0005 inches to the vertical reference - on the fly.

The "bad" part with such flexibilty is that, like Doug, I've found myself adjusting each record-type individually. A log of such would prove very useful, I'll have to take that suggestion. But, as Doug says, the transferability of such info to a different arm would be problematic.
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