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It's a RM-204, used with a KV-1520R. The transducer part number is 8-819-100-00, known as a SUC-1 "Speaker"
I have the service lit - 5 frequencies - 41.5Khz, 38.5Khz, 37Khz, 35.5Khz, and 40Khz. On-off is two oscillators working sequentially, 41.5 first, then the 38.5.
Cheers,
__________________
Brian
USN RET 22YRS (Avionics/Cal)
CET-Consumer Repair and Avionics ('88)
"Capacitor Cosmetologist since '79"
When fuses go to work, they quit!
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