<html><head></head><body><div style="font-family:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:13px;"><div>HI All,</div><div>I am looking for a 10Hz transducer for my coms. Does anyone know how to test a transducer to determine if it is 10Hz or 27Hz.</div><div>Hank</div></div></body></html>