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Audio and Video Talk
Vinyl
Ultrasonic record cleaning
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<blockquote data-quote="kubusi" data-source="post: 745556" data-attributes="member: 19010"><p>Does anyone know the approximate frequency of the ultrasonic cleaning used in the process of record cleaning in this instance? I have played around with ultrasonic cleaning in the past, built up a Heathkit device and used it to clean a lot of items over the years, used a number of cleaning agents with it such as dish washing liquid or a mild ammonia solution. The frequency was in the region of 40Khz. Was persuaded by a manufacturing jeweler friend to part with it.</p><p>At present working on a device belonging to a friend, trying to sort out some strange modifications done in the past, it uses a 807 valve as an oscillator and is supposed to put out 12 watts at 870 Khz, yes 870Khz right in the middle of the AM broadcast band. You should see the elaborate mains filtering in the device. I am in great need of the circuit diagram for it. Siemens model PTB V-U 011/55. Can find nothing on the Internet,</p></blockquote><p></p>
[QUOTE="kubusi, post: 745556, member: 19010"] Does anyone know the approximate frequency of the ultrasonic cleaning used in the process of record cleaning in this instance? I have played around with ultrasonic cleaning in the past, built up a Heathkit device and used it to clean a lot of items over the years, used a number of cleaning agents with it such as dish washing liquid or a mild ammonia solution. The frequency was in the region of 40Khz. Was persuaded by a manufacturing jeweler friend to part with it. At present working on a device belonging to a friend, trying to sort out some strange modifications done in the past, it uses a 807 valve as an oscillator and is supposed to put out 12 watts at 870 Khz, yes 870Khz right in the middle of the AM broadcast band. You should see the elaborate mains filtering in the device. I am in great need of the circuit diagram for it. Siemens model PTB V-U 011/55. Can find nothing on the Internet, [/QUOTE]
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Audio and Video Talk
Vinyl
Ultrasonic record cleaning
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