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Welcome Licorice Pizza (LP) lovers! Setup guides and Vinyl FAQ.

RE: Mint protractor-Nottingham Analog Interspace arm

Your mounting distance measurement is very different from Nottingham's specification of 222-mm. Your measurement indicates an effective length of 229-mm.

Does you headshell have slots so the cartridge can slide forward and backward? If so, where is your cartridge relative to the slots? If it's basically in the center of the slots and you think you have a good alignment, I would recommend confirming your mounting distance measurement again with the most accurate measuring device you have. Then, round it off to the nearest millimeter and send it to the Mint Protractor people.

Another thing you might want to do first is to make your own arc protractor using the mounting distance you measured and see if it provides a more accurate alignment. There is a free program online you can dowwnload to print custom arc protractors. It's Conrad Hoffman's Custom Arc Template Generator for Phono Cartridge Alignment. You can find it at the link below.

After you download Conrad's arc protractor program, simply use the mounting distance you measured and select IEC inner and outer groove radii of 60.325-mm and 146.05-mm. Then select Lofgren A and print your arc protractor. I would recommend printing it on heavy stock. I use 110-lb paper. Your protractor should look like this but with the mounting distance you measured:



You'll notice that Conrad's arc protractor program has X/Y axis adjustments so you can get very accurate results by adjusting the program printer correction factors. I use this program for all my alignments and I think it's just as accurate as the expensive protractors. YMMV



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