Andy, Bill and Kevin
Thanks for your advice. I ran through the check list offered by Andy, using two identical radios and an obliging mate. Nothing much changed, swapped the radios around, changed a lead no difference, tried different headsets, different PTT and repositioned the aerial@$#@!!
Today as a last resort dragged out the old 1/4 wave wire aerial mounted it on the trike - hallelujah - reading you 5 John!!!!!
Thanks again for your help, thanks to the guys in the Bendigo circuit for putting up with my numerous radio checks.
So where to go with the "Black Widow" aerial? I will talk to the supplier and see if they have any suggestions.
Cheers John