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Ultrasonic Cavitation & Cleaning Explained
Interesting... So they're dipping further into chemistry, and borrowing some tech from the AudioDesk for a new monster machine? As if their existing machine weren't already prohibitively expensive! Also interesting that they include the chemical details of their new cleaning solution at 4:46 in...- Packgrog
- Post #270
- Forum: Record Cleaning and Related Topics
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Ultrasonic Cavitation & Cleaning Explained
Yeah, the "only dimpling" (mostly) and less obnoxious noise level was the main reason I didn't second guess it being 60kHz. And yes, I do use a MicroLine stylus (Audio Technica AT33PTG/II). If I find a record I don't mind risking in another test, I'll try the faster rotation and plain distilled...- Packgrog
- Post #269
- Forum: Record Cleaning and Related Topics
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Ultrasonic Cavitation & Cleaning Explained
FWIW, the rotation is currently 0.6rpm, and I rinse the record IMMEDIATELY after the cleaning process to try to avoid anything being dried in the grooves. But then of course I most recently followed this up with a full Tergitol cleaning and rinse that did nothing. This particular AIVS enzymatic...- Packgrog
- Post #267
- Forum: Record Cleaning and Related Topics
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Ultrasonic Cavitation & Cleaning Explained
It never did look like any photos online. As I understand it, while Sonix4 was a reputable company for a long time (a former Sonix4 engineer started offering custom built machines in that diyaudio thread), the quietly switched to 40kHz machines at a certain point. I dunno. Maybe mine was never...- Packgrog
- Post #266
- Forum: Record Cleaning and Related Topics
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Ultrasonic Cavitation & Cleaning Explained
It’s an older ST136H. I know that the Hz here is for the input power, not the transducers. When I bought it, it was specifically listed as being 60kHz, and the second link you provided shows exactly that in the specs (the versions with the H suffix have the built in heater). It’s worth noting...- Packgrog
- Post #261
- Forum: Record Cleaning and Related Topics
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Ultrasonic Cavitation & Cleaning Explained
That's indeed the closest listing I can find for my copy. Side 2 has the "SPAR" part in very faint etching in the runout groove. I just did a second cleaning with just the Tergitol 15-S-9 0.5mL/L dilution followed by a rinse pass. Looks pretty much identical to the "after_ultra" file. So that...- Packgrog
- Post #259
- Forum: Record Cleaning and Related Topics
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Ultrasonic Cavitation & Cleaning Explained
Yep, should be roughly 1.25" to 1.5" from tank bottom. Not yet. Just got back from a trip, so I'll try this as time allows, just in case. Yaz - Upstairs at Eric's, side 2. Would have to check the specific stamper, but seems like an original (if not "first") pressing from 1982. Distilled water...- Packgrog
- Post #254
- Forum: Record Cleaning and Related Topics
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Ultrasonic Cavitation & Cleaning Explained
This is from a Sonix IV 60kHz, bottom-firing tank. Something side-firing like the Degritter is likely better.- Packgrog
- Post #251
- Forum: Record Cleaning and Related Topics
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Ultrasonic Cavitation & Cleaning Explained
OK, time to ditch the ultrasonic entirely. It's damaging everything, even with 0.6rpm for 24 minutes. It did remove a couple of clicks that the liquinox/rinse/linquinox again/rinse/tergitol/rinse process didn't remove, but it's added background noise to the outer grooves. Time to bin this DIY...- Packgrog
- Post #249
- Forum: Record Cleaning and Related Topics
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Ultrasonic Cavitation & Cleaning Explained
I think it's fair to say that most of us end up following this approach out of pure ignorance. We're all just trying to figure it out, few of us have your aptitude with the chemistry and physics behind it, and there's decades of misinformation out there for us to wade through. In fairness, your...- Packgrog
- Post #242
- Forum: Record Cleaning and Related Topics
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Ultrasonic Cavitation & Cleaning Explained
Just checked the power draw on my Sonix IV ST136H. Without the heater but just running cavitation, it's 104W. With the heater its 380W. So sounds like your 90W estimate is likely correct. Is that adequate? Does that seem more or less likely to cause permanent damage? From what I can find about...- Packgrog
- Post #231
- Forum: Record Cleaning and Related Topics
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Ultrasonic Cavitation & Cleaning Explained
The 48 minute session was a sanity check. You had asked about the temperature of the bath when I'd done that time previously with the old motor (which ran at 5rph, this 4 rotations in 48 minutes). I intend to target full rotations in the future. 24 minutes does sound ideal. I used to use the...- Packgrog
- Post #230
- Forum: Record Cleaning and Related Topics
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Ultrasonic Cavitation & Cleaning Explained
OK, my motor does 0.63rpm at 4.5V, and 0.33rpm at 3V. I'm inclined to go with the slightly faster speed to make sure the grooves stay wet, and from extra paranoia about potential damage, but both are about equally close to that 0.5 target. This is the unit I ordered, which has clearly been...- Packgrog
- Post #228
- Forum: Record Cleaning and Related Topics
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Degritter Mark II
I will be curious to know your results. From much of what I've been hearing and reading, it may be most effective as an additional tool rather than a replacement for chemicals and agitation on the vacuum RCM. I too am extremely weary of the tedium, and would love it if something like this could...- Packgrog
- Post #114
- Forum: Record Cleaning and Related Topics
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Ultrasonic Cavitation & Cleaning Explained
It never did produce holes until this latest run. I assumed it never would with frequencies higher than 40kHz. At least until I saw similar tests with the Degritter. Flow rate of the filter pump is 8Lpm. I have NEVER run it while cleaning, only on rare enough instances that something visible...- Packgrog
- Post #226
- Forum: Record Cleaning and Related Topics
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Ultrasonic Cavitation & Cleaning Explained
Definitely getting cavitation. I'm a bit startled to see that it punched through the foil, though. That was after maybe a minute or two. Photos on this post, since I can't seem to embed the photos here. Should I stop using this, or just make sure that the speed of rotation is roughly 1RPM? It's...- Packgrog
- Post #224
- Forum: Record Cleaning and Related Topics
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Ultrasonic Cavitation & Cleaning Explained
I appreciate the response, Neil, and apologize for posting in the wrong thread. My interest was still partially one of "could a Degritter help salvage some of this", since I've seen both MKI and MKII units on discount, though that seems unlikely. Yeah, my DIY ultrasonic rotisserie is a hold...- Packgrog
- Post #222
- Forum: Record Cleaning and Related Topics
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Degritter Mark II
Hey, @Neil.Antin, I think we chatted on the old vpiforum board a while back. I've been using a variation of your cleaning solution recipes, dumbed down for me by another chemist in the community. I've been using a 10ml Liquinox per Liter distilled water dilution for my pre-cleaner, and 25ml/L...- Packgrog
- Post #111
- Forum: Record Cleaning and Related Topics
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