"chris" wrote in message
...
If triggered it will beep on 121.500 Mhz. This can
also be heard on old style manual tune AM radios at 1215 AM.

Nevermind that rubbish about an AM radio, someone told me that years
ago and I believed them. A little thinking or testing proves it
wrong.
Chris

1215 AM = 1215khz = 1.215Mhz not 121.5Mhz, off by a factor of 100.

Al G