The Secret Society of Lathe Trolls

Yes, I have seen bias noise on lacquers many times. It usually doesn't make it to the pressing, however. The undulations are so small they don't fill properly on the pressing and just disappear. I have cut several projects from DSD (SACD) and they have lots of noise shaping out to 50kHz in the recor...

Just in case anybody following this thread is wondering who is right and who is "incorrect-I-mundo" here, I found this. Sorry, if I had found it earlier I would have made it the body of my first post. A direct quote from page 1 of the NEUMANN VMS-66 lathe manual: "All transducer systems which involv...

Actually when feeding a square wave into the system the resulting groove looks like a triangle wave WITH inverse RIAA in the system. Try it. The effective feedback range of an SX74 is around 20Hz to 17kHz. Neumann puts in a shelving network at those frequencies to mildy tweak the response outside of...

Thank you. I understand what you are saying and your last line sums it up nicely. I don't think cd4 cutter gets it. I am not really interested in what the head does open loop. I do understand that it is all part of the electromechanical system, but I obviously don't cut with it that way. I posted fo...

There is only one person making this difficult and that person is you. I have read your posts and you spend most of your posts telling the entire world that they have it wrong and you have it right. Who is disseminating falsehoods here??? I DO use inverse RIAA at the input of my system as does Neuma...

I get lots of questions to my website http://www.recordtech.com/lp.htm about all things technical regarding cutting. Recently a post on Lathe Trolls, from a year ago, was brought to my attention. It was posted by "cd4cutter" who claims that all the well known data on everything RIAA is wrong. Hmmm. ...