In message <77636CA4-F5E7-437E-8A7F-E59A42297F13@pstewart.f2s.com>, Paul
Stewart <europa@pstewart.f2s.com> writes
>
>I've done something stupid but can't work out what. I have a microair
>760 radio wired through an XCOM intercom. Fired it all up for the
>first time this evening. To my great surprise it all worked (almost).
>Radio receives fine. Intercom works a treat. Even the music input
>works. However when I press the PTT (either P1 or P2) a get a loud
>buzzing in the headphones - the radio also transmits this buzzing. It
>does this even without a mic plugged in. Anyone suggest what I've done?
>
It sounds as though the microphone is not connected into the Microair.
The buzzing would be due to the open circuit on the microphone input to
the transmitter.
Regards
Ken Whiteley
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