gm300uhf

When the mic is keyed, instead of transmit going "on" once, as long as the mic button is held (normal operation)... Radio transmit keys repeatedly ~ 1x per second. I've exchanged mics. Does not seem to be channel-specific. Ideas? Thanks, all!

hi has anyone got a good codeplug for a gm300 uhf 403-470 any help with this would be much appreciated. if it could be sent to my email ad that would be great graemedrew@msn.com thankyou graeme