Many thanks for the quick responses. And thanks Martin for the reed switch replacement advice – right channel reed element promptly replaced and all is working well now on both channels. An excellent sounds, on the brief test I’ve carried out so far.
Glad I didn’t have to delve any further into the electronics – I do have a scope (but it’s at our property in the USA…)…however, I have yet to work out how to use it, though I have several vintage radio sets there that might require it’s use some day!
thanks again,
Ken