The Secret Society of Lathe Trolls

I'm not aware of any technology that allows individual analog recordings to be "pressed" into metal of any kind. Metal is just too hard to take the fine detail of an analog record groove with any kind of pressing or embossing operation. The other main problem being that you would smash the stamper t...

I can't imagine anybody actually trying to start up a vinyl record pressing plant these days. There just aren't enough customers to make such a proposition economically supportable. Unless your VERY rich uncle just died and you've got a few million bux that you want to piss down a rathole. Yes, viny...

These videos are pretty accurate with one major exception that I'll get to later. These appear to be part of the educational series "How It's Made" which is produced in Canada and aired on the Discovery and Science cable channels in the USA. These tutorials are generally quite accurate and very info...

Lewis, Yes, my Neumann lathe had the Lyrec direct drive motor. The switchable half speed option was provided by Neumann. It was kind of an odd arrangement, but I think I remember that it switched in and out a rectifier to change the number of power pulses per second delivered to the motor. Full wave...

As I mentioned above, "Dynaflex" was the term used to designate a new physical record profile and weight that RCA introduced in the 1960s, although it came to be confused with the term Dynagroove which originally was meant to describe the new electrical processing of those records. Prior to this tim...

The RCA Dynagroove process was originally intended to describe the signal processing that was newly developed. The name Dynagroove later came to imply the changed record profile and record weight which were originally termed "Dynaflex". Yes, as has been mentioned here already, Dynagroove was primari...

Hi all. I just discovered this board and began reading some of the posts. Hmmm, I'm seeing a fair amount of guesswork, misinformation, and just plain old wives' tales being passed on here. So I'll try to fill in the blanks from what I know from my disc mastering experience at RCA Records during the ...