Almost forgot, another thing that may result in azimuth error is how tight each screw is. At one point in the midst of doing my measurements I had gotten crosstalk deviation within specs, I decided to retighten the cartridge screws just to be sure, this changed crosstalk deviation beyond specs.
To reiterate, my experience teaches me no physical measurements protocol will result in proper azimuth settings. One may get lucky and find the mark, but for proper azimuth it is absolutely necessary for an electronic measurement.
With practice this method is actually quite easily accomplished, not rocket science here. Purchase or borrow the Fremer video, the PDF files alone are worth the price. Actually, now that I think of it, it may be necessary to buy that video as it has the Wally azimuth voltage to decibel conversion chart that is absolutely necessary. It may also be available elsewhere on the web for free, I haven't checked. You also need a record with 1kz test signal for both left and right channels, I used the Cardas record.
To reiterate, my experience teaches me no physical measurements protocol will result in proper azimuth settings. One may get lucky and find the mark, but for proper azimuth it is absolutely necessary for an electronic measurement.
With practice this method is actually quite easily accomplished, not rocket science here. Purchase or borrow the Fremer video, the PDF files alone are worth the price. Actually, now that I think of it, it may be necessary to buy that video as it has the Wally azimuth voltage to decibel conversion chart that is absolutely necessary. It may also be available elsewhere on the web for free, I haven't checked. You also need a record with 1kz test signal for both left and right channels, I used the Cardas record.