Isaacrivera, from your photo your tonearm is not as high on the pivot end as I had imagined. I found for both the JMW 10.5i and 3D arms that the CounterIntuitive device made adjusting more difficult, so I did without them on both arms. Regarding the counterweight, mine is sort of in between the pivot bearing and the end of the tonearm. I don't want to switch weights at this point as I'm happy with where things are set. I have the fine adjustment weight attached to the main counterweight which is very useful for dialing VTF in with more precision.
VPI Classic 3 + 3D Tonearm SRA Adjustment issue
I have owned a VPI Classic 3 for about 4 months now. The VPI folks kindly installed a Dynavector 20X2-L that I provided. Initially I followed the manual's setup instructions: VTF, VTA by making the arm parallel to the record, and azimuth by the rod method. Michael Fremer suggests this method leads to 80% precision. The table sounded better than out of the box and I was happy.
But who buys an $8,500.00 turntable setup to be lastingly happy with 80% setup precision?
So after reading enough and obtaining the tools I set out this weekend determined to extract another 15-17% out of this system. The "tools" are a 2-digit-precision digital VTF gauge, a 400X digital microscope, and a Fozgometer Azimuth Meter.
Confirming the VTF was within range for this cart (1.8 - 2.2g) I set out to correct the SRA via microscope pictures as described by Michael Fremer and this is where trouble began as I could only adjust SRA to ~91-92 degrees by raising the arm as far as the VTA tower will go without loosing thread. At this height, a second guiding post the tonearm base has located near the arm rest no longer reaches completely through the top platform of the tonearm and it can't be locked via the locking screw next to it.
This seems odd, but I re-measured several times being very careful when taking the images to be parallel to the cantilever. Playing music like this confirms the tonal balance sounds better.
I was able to adjust the azimuth and the rest. But it seems wrong that the arm be that high to achieve proper SRA.
Could it be the cartridge cantilever is angled wrong? Could the VTF affect the SRA enough to cause this if it was on the higher end of the range? Or is there a way to raise the whole tonearm not using the VTA tower to achieve a more appropriate base height that then can be fine tuned with the VTA tower?
I appreciate all insights.
But who buys an $8,500.00 turntable setup to be lastingly happy with 80% setup precision?
So after reading enough and obtaining the tools I set out this weekend determined to extract another 15-17% out of this system. The "tools" are a 2-digit-precision digital VTF gauge, a 400X digital microscope, and a Fozgometer Azimuth Meter.
Confirming the VTF was within range for this cart (1.8 - 2.2g) I set out to correct the SRA via microscope pictures as described by Michael Fremer and this is where trouble began as I could only adjust SRA to ~91-92 degrees by raising the arm as far as the VTA tower will go without loosing thread. At this height, a second guiding post the tonearm base has located near the arm rest no longer reaches completely through the top platform of the tonearm and it can't be locked via the locking screw next to it.
This seems odd, but I re-measured several times being very careful when taking the images to be parallel to the cantilever. Playing music like this confirms the tonal balance sounds better.
I was able to adjust the azimuth and the rest. But it seems wrong that the arm be that high to achieve proper SRA.
Could it be the cartridge cantilever is angled wrong? Could the VTF affect the SRA enough to cause this if it was on the higher end of the range? Or is there a way to raise the whole tonearm not using the VTA tower to achieve a more appropriate base height that then can be fine tuned with the VTA tower?
I appreciate all insights.
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- 10 posts total
- 10 posts total