Ultrasonic record cleaning?

Seems like Bent Audio had an ultra-sonic cleaner a few years back. You could ask them?

I think I read somewhere that John Chapman hadn't the time to pursue it further and turned over development to Bob Benn at Sound Engineering

That's right. Thanks yanx.

Some people have made their own using the large ultrasonic cleaners used in the medical profession. I saw John Chapman's prototype at VSAC 2003.

I also had a friend that built a small one - one LP at a time. It worked quite well. It was amazing to watch the debris coming out of the grooves of a record that had been cleaned on a VPI RCM. Unfortunately, my friend never had time to build the big one that would clean multiple records at a time.

With the drop in prices of ultrasonic cleaners from China, hopefully, someone will bring out a commercial version. They really work much better than the hand scrub/vacuum dry machines.