Rose, I think you are right about the Kendal ultrasonic cleaner although I did not find detailed info on the unit. I thought I would pass along an idea (as yet untried) on how to repair a failed ultrasonic cleaner should one fail. The inexpensive ultrasonic cleaners have a transducer epoxied to the bottom of the cleaning pan. It is my guess that the transducer used is the same as the ones used in ultrasonic humidifiers. Where I live there are many ultrasonic humidifiers for sale in the thrift shops. Rather than throw away a broken ultrasonic cleaner, remove the transducer and transducer electronics from a used ultrasonic humidifier and install it in the broken ultrasonic cleaner. The transducer driver is matched to the transducer and so they must be replaced together.
Here is a schematic of a transducer driver: http://www.discovercircuits.com/DJ-Circuits/ultra40khzxtr1.htm If you are an experimenter, you can try using more than one transducer to increase the power of the unit. See: http://www.tmasc.com/ultrasonic_cleaning_process.htm "To transmit the vibrations a transducer must be firmly and acoustically linked to the diaphragm of the tank [bottom of the tank in most cases.] This is accomplished by epoxy bonding or by a metal brazing process. The placement of the transducers on the bottom of the tank will have an effect on the even distribution of energy within the tank. The ideal diaphragm is round [much like an acoustic speaker.] Since we make square ultrasonic tanks care must be taken in their design so that the distribution is as even as possible. Multiple simultaneous frequencies can be generated from a stack or multi component transducer assembly by bonding 2 or more stacks of transducers to a bar and energizing the entire bar. The bar itself will generate additional frequencies. The bar with the transducer assemblies is bonded to the bottom of the tank. Several of these bars will make up an ultrasonic system dependent on power required." Just a wild idea. - Steve N -----Original Message----- From: maniaka rose [mailto:aroseby...@gmail.com] Sent: Thursday, May 20, 2010 1:04 PM To: silver-list@eskimo.com Subject: CS>Sonic cleaners Afternoon, I am researching sonic cleaners. Have found this one on ebay http://cgi.ebay.com/170-WATT-2-LITER-DIGITAL-ULTRASONIC-CLEANER-HEATER-/ 310220644161?cmd=ViewItem&pt=LH_DefaultDomain_0&hash=item483a975f41 Unit is a Kendal which has 170 watt. However, in reading post on sonic cleaners the information that even the 160 watt cleaners only utilize 50 watts for cleaning...the rest of the wattage is for heating. Can anyone comment on this for my clarification? I'm passing on the Harbor Freight unit bc it has a 30 day warranty. Frankly we have never had any success with items from HF lasting any even brief amount of time so I want to go with a unit that has a year warranty bc it means at least in the short term the co expects it to last more than a few weeks. This is also the longest warranty I have found on any unit thus far, including the larger 160 watt unit. This unit is 30$ more than the 2 1.2 litre from HF. It's 2 litre which is plenty for our use. This unit http://cgi.ebay.com/160-WATT-5-29-PINTS-DIGITAL-ULTRASONIC-CLEANER-HEATE R-/330433239383?cmd=ViewItem&pt=LH_DefaultDomain_0&hash=item4cef5b1957 is the 2 1/2 litre, 160 watt that only has 6 mo warranty. This unit has no label that I can see so brand unknown. We have a sanctuary for special needs beast so will be doing experiments on beast and us. Wish to explore creams, other minerals, vitamins in liposome form. Any input from your ongoing experiments is most sincerely appreciated. Please email me privately if this is going to far off topic. thanks as always for being such a wellspring of information xxx rose -- The Silver List is a moderated forum for discussing Colloidal Silver. Rules and Instructions: http://www.silverlist.org Unsubscribe: <mailto:silver-list-requ...@eskimo.com?subject=unsubscribe> Archives: http://www.mail-archive.com/silver-list@eskimo.com/maillist.html Off-Topic discussions: <mailto:silver-off-topic-l...@eskimo.com> List Owner: Mike Devour <mailto:mdev...@eskimo.com>
