Electrical interference with HF radio

[PeeBee]

Sounds like you have the coax grounded at both ends with a difference in potential between those earth points causing current in the shield. Quite possible one of your grounds is not good. Try removing the antenna from where ever it is mounted so that it does not contact ground and just relies on the ground from the radio.

Thanks BB. I run a braided earth from the antenna base to the chassis. Connection is assured with conductive paste as well. i run a second earth cable in 10mm round to a different location on the chassis, again connections soldered to the lugs and conductive paste. the radio is earthed to the body also, with conductive paste, all connections tight. I will run an independ earth from the antenna to the same earthing point for the radio as you suggest, however since the body is earthed to the chassis in 6 places, and the battery earthed to the body and then to the chassis, I reckon the earth is secured. the Codan tech discounted the earth as a problem, he thinks its a generated Rf so either find the source and eliminate it or I am investigating a device to try and null it out, such as this. i am waiting on a return call from Strictly
ham to get their thoughts. I have a pre amp I could try however whilst i could probably enhance the legible signal, I think i will also raise the floor level of the interference - will see. thanks for the input also.https://www.ebay.com.au/itm/MFJ-1026...frcectupt=true