Mbs3 - This is the exact setup I have. Really excellent results with it!
I know the best results would come from a machine that can do a frequency of 60kHz to 70kHz but the price for those goes up dramatically. For people on a budget but really want something that does a very good job these ultrasonic units are excellent!
I did change one thing. I felt the motor turns too quickly to really give the record a good soak so I purchased a variable power supply (about 3V to 24V) and usually run a little over 3V to the motor I keep it running slow. This provides more time while under water to clean it. Then, when I remember (not important), 2/3 of the way through I turn it up to about 6V. I rarely run it faster then at 6V.
This is the description if you want to search for it. Only $19 right now on Ama… Works great and doesn’t overheat.
SHNITPWR 36W Universal AC to DC Adapter 3V ~ 24V Adjustable Power Supply AC/DC Converter Transformer 3V 5V 6V 9V 12V 15V 18V 19V 20V 24V 1A 1.2A 1500mA with 14 Tips & Polarity Converter.