Thumbs up for ultrasonic record cleaning

@nkonor,

I really understand the reason behind the decision..

Best!

Cleeds

Absolutely agreed. Once you've cleaned an LP with an ultrasonic cleaner, you realize no other method even comes close.

Could not agree more.  Klaudio record cleaning machine does the job for me. 

fsonicsmith, "When a reviewer automatically dismisses analogue as a faulty medium or insists upon truthful reproduction of the lowest octave of pipe-organ or double-bass, I know to steer clear."

I share your skepticism with commercial reviewers, while appreciating Dudley.  But I'm confused by your statement quoted above.  The pipe-organ has the potential for a 16 Hz note which a cartridge may not track.  But the double-bass (4-string string bass) low reach is 42 Hz.  Any decent cartridge should reproduce that.

And yes, I prefer analog for sonic enjoyment.

@slaw

You ask, "Ever tried a carbon impregnated filter? Is this a possibility in our application?"

Yes and yes. I go one step further to carbon block filters (0.5 micron particle filtration) for the next-to-last rinse.

@slaw 

RE rinsing, I should add that it is important to start with good water. It's not too hard to get rid of the suspended solids, but the dissolved minerals are hell. RO is about the only way to reduce them, and even then you have to worry about the spec. One key spec is conductivity (high is bad).

If you don't have good tap water, I would suggest successive baths in distilled.