Audio Desk Systeme RCM - what's been your experience?

From what I could learn through research prior to purchasing a top-quality medical grade ultrasonic cleaner, all ultrasonic transducers eventually wear out and require replacement. That clinched my decision to avoid all expensive audiophile-vetted units with mysterious parts inside, and instead purchase the best commercial unit I could find(German-made Elmasonic with dual 37kHz and 80kHz frequencies). I added an LP spinner from ebay and am in the process of adding a pump circuit with 1 micron filter. Total cost was around $1700.

My VPI 16.5 worked for twenty years without requiring service. I don’t expect as long a life from an ultrasonic cleaner without servicing, but it does do a better job than the VPI.

@whart

I followed advice on a couple of DIY sites with respect to chemistry and filtering. A surfactant like Kodak Photo-flo 200 definitely helps, together with isopropyl alcohol, a drop or two of Dove detergent, and maybe a drop or two of Finish drying agent. The filter circuit will be a Little Giant 1-AA-OM pump(originally purposed for hot beverage dispensers), a Hydronix HF2 filter housing for 2.5" x 5" filters, and Hydronix SDC-25-0501 one micron filter cartridges. According to another DIYer, the Little Giant pump is strong enough to push through the fine mesh of a 1 micron filter.