Anybody ever take the bottom off and have a look at the transducers inside? Any photos possible? It has been said that they are tuned to the bath but seems unlikely when the water level would presumably need to be part of that equation and there are no directions.
I did a quick experiment holding a transducer directly in the water over a piece of kitchen foil. No different effect than if bolted to the bottom. You get perforations in very localised spots. Interesting to know what the distribution of US power is throughout a water bath. I suspect it is not very even. Is anything known about this? Tempted to try another transducer as a receiver and use a CRO to map the distribution. Or get a US receiver. Or is life too short?
I did a quick experiment holding a transducer directly in the water over a piece of kitchen foil. No different effect than if bolted to the bottom. You get perforations in very localised spots. Interesting to know what the distribution of US power is throughout a water bath. I suspect it is not very even. Is anything known about this? Tempted to try another transducer as a receiver and use a CRO to map the distribution. Or get a US receiver. Or is life too short?
Is there anything in particular (beside what I wrote in #515) you want to know?
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If I could ask, if there's another pic you could post that shows a close-up of the plastic hang-on units? I'm curious how you designed it. Thanks.
Also ordered a 6.5L analog.
Might also end with a 10L digital, which I won't mind of course
I just received mine and I am a bit puzzled. While it seems to work, the buzzing sound is not stable. It seems to change pitch at intervals. There is not a constant buzz. Is it something to worry about?
I am uploading a zipped video of the cleaner working. Hope to get some good feedback
Video is helpful, Dimkasta.
I'm curious to hear what others have to say. If the transducer truly is working at 40kHz, then you're not hearing the transducer but rather the secondary vibrations of water, metal parts and the like. Because of different materials, sizes and densities, resonances, etc., I'd expect some variation in those vibration noises. But I'd expect others to be hearing them too.
Hi Dimkasta, Try taking the basket out. You won't want that in there for cleaning LPs anyway. If it still changes pitch like it does in your video, there's a problem with the machine.
Good luck,
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Maybe a link to my tread when building the cleaner is easier?
A lot of Norwegian text, but also some pictures - from prototype (in plywood) to finished
ptb´s USC vinylvask prosjekt - Side 5
I just heard the zipped video. The sound quality is crap... I have uploaded the uncompressed vid to my site.
The changing pitch is much more audible here, with no compression artifacts.
http://www.kastaniotis.net/uc.mp4
The changing pitch is much more audible here, with no compression artifacts.
http://www.kastaniotis.net/uc.mp4
In addition to the malfunction that the pitch variation would seem to indicate. I find the basic sound of that machine very irritating. I couldn't stay in the same room for very long. A good 40khz machine does not sound like that.
Higher frequency, higher quality machines produce much less audible noise. The mechanical timer on my machine makes more sound than the ultrasonic transducers do.
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Higher frequency, higher quality machines produce much less audible noise. The mechanical timer on my machine makes more sound than the ultrasonic transducers do.
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