Vacuum Record Cleaner Rreplacement

@ljgerens 

My partner had a CD that was smeared with fingerprints or similar and was unreadable.  She cleaned it in her ultrasonic jewelry cleaner to no avail.

At that point, I read the instructions.  Using warm water and a drop of dishwashing detergent did the trick.  The CD came out like new.

I think the surfactant was more important than the temperature.

By the way, I follow Neil Antin's recommendations for washing and rinsing agents, which are Polysorbate20 and Ilfoton respectively in Australia.  About A$20 per litre each.  A litre will likely see me out at about a teaspoon per batch of records 

I treat my polycarbonate reading glasses for maybe 30 seconds through the same process, making sure the lenses don't touch anything.

@ljgerens  "The cavitation process itself produces high localized temperatures."

Reference? Amount of delta T? Duration? Pressure yes, and that leads to bubble formation. Bubbles are NOT due to heat, but due to pressure change. Easy to demonstrate by taking room temperature water, start pulling vacuum. Soon enough it "boils" but not because of temperature but pressure. Particularly with water's high heat capacity, I'm skeptical about any temperature effect due to US. Not a physicist for sure. I have run US for half an hour at room temperature (for SEM specimen preps), and there is no perceptible temperature change after that amount of time.

Interesting re that U-shape curve. Reference? Scale? Whether U shape has maximum at 100 and minimum at 99 or 10 makes a difference, and determines whether it matters in practical applications. And, it will also depend on the specific compound, so assessment of a variety of them to see common pattern and variance will be important for proper consideration.

@audphile1 re SPL typically around 70. Actually, doing gainstaging with Zesto SUT, PS, and preamp, I have been able to cut down on tube noise. I am so glad that you dismiss my own observations out of hand. So refreshing! And, no, there is no digital interface anywhere, except when I play digital music, of course. It is what it is. That is my listening experience. 

@oberoniaomnia 

Refreshing? Well I aim to please.
 

First of all make up your mind. Is it the tube noise that you don’t hear between tracks or is it the surface noise that you don’t hear. Two different things entirely. 
You stated earlier you don’t have surface noise but you still have tube noise between tracks if you crank the volume up.
Now you’re saying you eliminated tube noise. 

I 100% believe tube noise in phono stage can be eliminated using SUT if the tubes in your phono manage the gain for LOMC and you bypass them with external SUT. I had no tube noise with low output MC into Lab12 Melto2 tube phono. Gain is achieved by using lundahl internal SUTs in that phono amp - tubes have nothing to do with gain in some circuits.
So now back to record surface noise between tracks. No bueno there convincing me it ceased to exist on top of your turntable platter. Do I believe you can’t hear it? Sure. If you have volume too low you won’t hear it. But raise it to around 70-80db and there’s no going around the noise that stylus makes traveling the space between tracks. 

@oberoniaomnia 

You and @ljgerens are both right .  At the macro level, running an ultrasonic machine does not warm the body of water to any appreciable extent.  Hence my Vevor has a thermostatically controlled electric heating element built in in order to adjust the bulk temperature of the water.

On the microscopic scale however, things seem very different.  Remember that temperature measures molecular kinetic energy.  With ultrasonic waves creating cavitation followed by implosion, some molecules become very agitato indeed - possibly about as hot as the surface of the sun according to Wikipedia.  But there is insufficient time to transfer that heat to things it could damage.  It is a bit like the quantum theory of 'empty' space, where particles are created and annihilated at random.

Cleaning is caused by shock wave from the collapse of cavitation bubbles, see Wayback Machine for a scientific exploration.

From Ultrasonic cleaning - Wikipedia

An ultrasound generating transducer built into the chamber, or lowered into the fluid, produces ultrasonic waves in the fluid by changing size in concert with an electrical signal oscillating at ultrasonic frequency. This creates compression waves in the liquid of the tank which 'tear' the liquid apart, leaving behind many millions of microscopic 'voids'/'partial vacuum bubbles' (cavitation). These bubbles collapse with enormous energy; temperatures and pressures on the order of 5,000 K and 135 MPa are achieved;^[7][8] however, they are so small that they do no more than clean and remove surface dirt and contaminants

"tubes have nothing to do with gain in some circuits."  Those would be solid state circuits, because otherwise, even if you use a SUT, most of the gain, even though the phono stage is in MM mode and making, say, only 40db of gain, the SUT is typically supplying another 20db or maybe 30db if cartridge output is really low.  So even in that case, most of the gain comes from an active tube based gain stage.  As for surface noise, in my experience that varies wildly from one LP to the next. But most of the time, surface noise is not intrusive, in either of my two systems. It's there for sure, but only becomes evident when you change from a quiet LP to a very quiet LP.  And that's where surface cleaning can help. I listen "loud" by the way. My impression is that surface noise is more evident in between bands, and that may be related to how LPs are cut. So I don't really care about surface noise until there is also music, when it typically recedes to below some mental limit that would make it annoying.  If it IS annoying, the LP goes into the bin.