View source for Air ultrasonic trancducers

*https://groups.google.com/forum/#!msg/portable-sound-blaster/aZmw3i3LaWU/0uFHZwtR43EJ
 ...Chinese knock-offs of a original and venerable (and very nice) piezo tweeter originally made by Motorola, 
 then by a company called CTS.  
 I own a handful of those cheap Chinese knock-offs, and I have found a current Philippine maker of the high-quality version... and some are on the way
*http://www.ebay.com/itm/100-Watt-Air-ULTRASONIC-TRANSDUCER-4-Phasor-generator/310902068190?_trksid=p2047675.c100012.m1985&_trkparms=aid%3D444000%26algo%3DSOI.DEFAULT%26ao%3D1%26asc%3D20131230161411%26meid%3D5716819996430891544%26pid%3D100012%26prg%3D20131230161411%26rk%3D2%26rkt%3D10%26sd%3D310337550459
*http://www.ebay.com/itm/100-Watt-Air-ULTRASONIC-TRANSDUCER-4-Phasor-generator/310902068190?_trksid=p2047675.c100012.m1985&_trkparms=aid%3D444000%26algo%3DSOI.DEFAULT%26ao%3D1%26asc%3D20131230161411%26meid%3D5716819996430891544%26pid%3D100012%26prg%3D20131230161411%26rk%3D2%26rkt%3D10%26sd%3D310337550459
*[http://www.parts-express.com/goldwood-gt-400cd-bullet-piezo-horn-driver--270-069 Goldwood GT-400CD Bullet Piezo Horn Driver at 3.84$]
*[http://www.parts-express.com/goldwood-gm-500pb-1-horn-1-3-8-18-tpi--270-099 Goldwood GM-500PB 1" Horn 1-3/8"-18 TPI]


{{Cat1|Ultrasonic}}