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In Reply to: Cartridge allignment nightmares...HERE WE GO AGAIN! posted by Mr Blue Sky on May 16, 2007 at 18:38:25:
The "Pioneer overhang gauge is way off" you say but you're using a non-Pioneer headshell? Obviously, the Pioneer gauge is expecting that you'll be using the stock tonearm and headshell. If not, then all bets are off. Do you think that somehow the gauge on the plinth will know what headshell you are using?The ADC headshell is set up for an ADC tonearm and nothing else. These things are not universal.
If you can't get an alignment gauge set up for the Pioneer PL-15D II then you can't just use any old gauge you want. Alignment gauges are custom made as it were for the geometry of the exact TT and Tonearm combination.
I'd put the stock headshell on the tonearm and use the stock Pioneer PL-15D II overhange gauge on the plinth. That's your best bet.
Or maybe you should buy a modern TT with a current and easily found alignment gauge available???
Follow Ups:
First of all, are you saying that headshells can't be swapped from one arm to another? That's news to me."If you can't get an alignment gauge set up for the Pioneer PL-15D II then you can't just use any old gauge you want. Alignment gauges are custom made as it were for the geometry of the exact TT and Tonearm combination."....I don't understand this statement. Are you saying that the PL-15D uses it's very own setup geometry and no protractor in the world will work on it...and furthermore each table and arm in existence needs it's own proprietary protractor...but then in the end you say that only modern turntables work with universal protractors? Hmmmm....I'm really confused now.
Perhaps you should buy a modern turntable.
Any old headshell may fit the Pioneer... but it may change the geometry of the setup. Since you have no way of knowing -- exactly -- if you don't use the Pioneer headshell, if the geometry has changed, you have no way of knowing what alignment gauge will work.You can use a generic protractor, but you have to know the tone arm effective length and the center spindle to center pivot specs of the tonearm to make a generic protractor work for you. Do you know these specs? If not, the supplied Pioneer gauge on the plinth does and it is the one you can use and know that you have things set up correctly.
I know that vintage Thorens TTs have alignment protractors available for download that you simply print out and use. I don't know if your Pioneer TT has such a thing.
So, that's all I'm saying. With enough information, you can use any headshell that will fit and any alignment protractor. But from your original post it didn't sound like you had enough of this information.
...from what I understand, the geometry is irrelevant with a generic protractor IF there is a sight line and I am able to point it EXACTLY at the center of the tonearm pivot...which I am. When I had the ADC cartridge in the deck, I was able to set it up totally accurately...it's just that the cartridge was slightly off center. Now it's back to the original Pioneer headshell and I've just thrown it on there using the Pioneer overhand gauge and centering the cartridge body by eye. I can track a shaded dog Beethoven piano trio to the last band with no distortion...channel balance seems fine...guess that's that. Why continue to fuss with it?
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