stevef
"Sometimes us over-fifties have the attention span of a geriatric goldfish"
Don't worry mate, wrong side of 50 here too. I had to double check the first post myself.The trouble is as threads get longer less newcomers read all that has gone before.End up going in circles.Very easy to forget with so may inputs.To prove this we have the following...
The fact hangflyer has actually moved the noise from 1900 by changing the plugs then from 2100 to 2200 with a mag rebuild must be telling us something.
In the same post hangflyer says we have ruled out the ignition system but so far that is the only thing that has positively done something tangible to the noise apart from a higher gain antenna which made it worse.So whatever it is, it appears to be coming down the antenna and has some relation to the engine ignition system.Maybe not THE cause but it sure looks to be affecting it.
Occham's razor?