Audio Technica AT 666 vacuum disc


Is anyone currently using it?
I have it on trial, the product is almost perfect NOS, but after about 7-8 minutes the LP loses its vacuum; is it necessary to also use a clamp to get the vacuum for the whole LP?
128x128best-groove
Lol ... you wrote a heresy; speed has nothing to do with it, it’s always a 12 "instead of 7"

it is important to communicate with whoever owns this item.
I was just kidding with you.

The 12 inch 45 RPM records are usually about 7-8 minutes per side.
I just watched a video on this contraption. How was this ever thought to be a win?
https://video.search.yahoo.com/search/video;_ylt=Awr9Im5WkxJhd5QA_GxXNyoA;_ylu=Y29sbwNncTEEcG9zAzEEd...

Looks like something to toss in your audio junk drawer after the novelty wears off. Why not just get one of those reflex clamps with rubber spindle washer?