to buy or not to buy (ultrasonic record cleaner)


Hi Audiogoners,

So I have been considering investing in an ultrasonic record cleaning maching. Prob like some of you I question the ROI. So. I have a friend that purchased one and luckily he allowed me to take it for a spin (no pun intended).

I wanted to compare the results to my record cleaning system which is a Spin clean ($150) and a Record doctor record Vacuum ($300). I wont say what brand of ultrasonic cleaner I tested as not to disparage, or promote that brand publicly to be fair. if you want to know which one you can send me a private msg.

so to keep it simple I will let you judge for yourself. I have posted two pics taken with a USB microscope to my virtual systems page. Test1 and test 2. One of these pics was taken after cleaning with my system and the other with the ultrasonic cleaner

Can you tell which one is the ultrasonic??

should be intersting
barnettk
’Twas the original "automatic" record cleaning machine borne out of Percy Wilson’s papers on vinyl record contamination. There was a test mule, photograph of same floating around on the web somewhere, and Monks was the one to commercialize it. I saw my first one circa early '70s at the high end salon in Pittsburgh, run by the debonaire Tasso Spanos (lovely guy with ears and a real sense of the high end back the day). Tasso was one of the few I knew who had one-- they were really aimed at libraries, radio stations, and in the UK, facilities that would offer record cleaning as a service.
Tasso’s old machine showed up on E-Bay or Audiogon several years ago as a rusted out hulk.
When Monks the Elder died, the company became dormant, though there were still folks out there servicing them. Monks the Younger rebooted the company a decade or more ago, and this is one of the newer models-- finish may be a little nicer than the early ones, but the unit is in many respect the same British engineering- quirky, but it gets the job done and I like it as an artifact. (The pump actuator is from a Mini with a windshield wiper icon-- I don’t use the fluid brush head dispenser because I use various fluids and a pure water rinse). The machine is still made as far as I know, although Monks recently introduced a line that doesn’t rely on the thread buffer that was part of the design of these-- I have not seen or played with these newer ones, which I gather are priced at a few grand as opposed to several few grands. It’s a keeper.
Yes the Monks RCM are back and now a threadless design that cost $1000. The original Monks machines are still being made but have been converted using the same threadless design as well, from what I've been told. Easy to use and very quiet.
"doesn't clean down to the 2-5 microns in the bottom of the groves"
An elliptical stylus is 0.2mm to 0.7mm. 2-5 microns is 0.002-0.005mm.
The stylus does not go anywhere near this. 
https://www.vinylengine.com/turntable_forum/gallery/image/22429
And, the oily natural surface of an LP is needed to lubricate the groves.
It is necessary to keep some oil in the groves. The KM fluid is highly refined to leave the "right" amount of oil.
A major benefit of the KM RCM it that it cleans near 100% of the excess dirt. Whereas the ultrasonic method circulates all the dirt in the fluid. And then blow dries the residual on the record. Most don't change the fluid very often. And how it takes 5-10 minutes instead of 1 1/2 minutes of the KM.