The Secret Society of Lathe Trolls

Thanks for that detailed reply. VR uses 1A fuses inline for the each channel of c-head. 2000W amp as far as I remember (?). But each head is different. Presto K's used 2x6V6 (or 6L6) tube amps, and it was just a hair quieter than VT, and those amps would make around 30w clean so I am confused... Isn...

Is there any way to know what is the max power of the old mono cutting head? I mean, max power RMS I can send before I fry it? I want to build a power amp for Neumann MS52H, but don't know where +/- to start.

Thanks!

I'm just an amateur, but I like to think. If it's nothing mechanical, then maybe it's the signal path? I think that if the stylus is permanently affected by faulty frequencies on one channel, that can cause damage (but you can't hear them because they are outside the 20Hz to 15kHz range - acoustica...

PMST wrote: ↑

Mon Apr 25, 2022 8:24 am

Did you re-calibrate the travel to the center of the disc? Maybe if the overhead isn't travelling exactly straight to the center of the spindle it could do this. It's a guess, but worth checking.

Yep.. It is exactly on the center... That's why I run out of ideas here...

Guy/girls. I have ongoing problem with VR that I can't trace for years... My diamond stylus always breaks on the same side (e.g I have hiss on the same side when it starts to wear). And what is also related with this - when doing a loop, e.g. ending loop - the pop/click/crackle also is heard on that...

I know. Just asking if its possible.

I'm wondering if its possible to engrave (not cut) with a VR?
What's on my mind - reversing diamond (180 degree) and do a mono-audio maybe?

MeJay wrote:Hiya.

Are current Xray plastics still good to Lathe cut?
Is someone able to cut from digital files direct to current Xray material?
Has anyone tried standard plastic laminated paper to cut?

I have done it, results vary. depends on brand of xrays.

PS: I believe I've had also complete Presto K-7 somewhere...hmmm

I've been collecting them for years, lack of time to fully restore! 1. PRESTO K-8 w/1-D cutterhead - motor works, amp works, cutting head works, platter spins steady - 1800 eur 2. PRESTO K-8 w/1-D cutterhead - motor works, amp works, cutting head works, platter spins steady - 1800 eur 3. PRESTO K-8 ...

Hi there. I have couple of lathes for sale, but oldies...