Originally Posted by Festinghouse
That was quite witty for you col, but yes, rather unhelpful! As for cables, i thought it was only ac not dc that caused interference?
Ok Jon, I deleted my earlier attempt at humour and admit it was my bad! A bit of bedtime reading on VHF issues has however turned up some 'more helpful' suggestions.
Apparently if the antenna is mounted too close to the microphone not only can it cause background noise on transmission (rf feedback?) but if the users head is within 1m it can also destroy brain cells......!
Also a bad negative can be the cause of additional noise, as can a low battery condition. The OP didn't have his motor running when he transmitted so perhaps this contributed to the problem.
I seem to remember he has also suffered with bad wiring on previous occasions (GPS Fuse and nmea?) so perhaps there is an inherent and unresolved issue here?
So there's three suggestions that might help explain what's wrong here and hopefully make up for my earlier faux pay.