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Using scope for turntable adjustments... Anti-skating, VTA, weight...
Using scope for turntable adjustments... Anti-skating, VTA, weight...
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Old 5th October 2018, 12:24 AM   #1
murillollirum is offline murillollirum  Brazil
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Join Date: Nov 2012
Location: Brasil
Default Using scope for turntable adjustments... Anti-skating, VTA, weight...

Hi folks, just wondering how to properly use a scope to setup the turntable parameters. Anyone here do this? I have the Analog test disc with the 1khz some wave, anti-skating tests, resonance frequency test, channel separation...
Cheers
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Old 5th October 2018, 10:34 AM   #2
lcsaszar is offline lcsaszar  Hungary
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Join Date: Mar 2004
Location: Budapest, Hungary
There is nothing a scope could show you and your ears can't.
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Old 5th October 2018, 05:30 PM   #3
ThomasA is offline ThomasA  Sweden
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Quote:
Originally Posted by murillollirum View Post
Hi folks, just wondering how to properly use a scope to setup the turntable parameters. Anyone here do this? I have the Analog test disc with the 1khz some wave, anti-skating tests, resonance frequency test, channel separation...
Cheers
Some things you can do.

- Cartridge azimuth; set it visually initially and check crosstalk with scope/test record. Fine adjust if nessecary, but don't alter more than within a degree or so.
- High frequency response, adjust loading for MM cartridges for more linear response.
- Compliance: use test grooves to determine the resonance frequency and the compliance of the cartridge.
- Tracking force: you should start to set it in the middle of the recommended range. If the compliance is the same as the specification says, keep it in the middle. If compliance is higher, you can lower VTF a bit, and if it is lower, you can increase VTF a bit. it varies between different cartridges. Finally, fine adjust depending if you hear mistracking.
- Antiskate: Using high level modulated test tones for antiskate usually sets antiskate too high. You can however use it to set the highest antiskate setting and then use the blank vinyl test to set the lowest setting, and then finally end up with a setting that is between those two endpoint settings. Final check can be done looking at the cantilever with a loupe when it is set down into a music groove. It should not move to the left or right with respect to cartridge body, but be steady in its original "resting position".
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