Cheap field strength meter?

 Thanks for that. I have ordered a Supra internally in Norway for about £53, which is not cheap, but if I find it effective I could find a cheaper shop in Sweden most probably, where they are made AFAIK.

I also have a Eupen on the way from www.audusa.com. this will be £55.36 inc P&P ex VAT but I will have to pay our VAT on that, at 24%, plus our tollservice's paperwork for over a tenner, so you can see why I want to find a local source if at all possible, in case I turn out to want several of these things of one type or another.

This is totally off the top of my head but: what about using an old CB SWR meter in field strength mode (a passive device)? If one attached a small loop to the supplied terminals and waved it around the cables and boxes, shouldn't one get an indication of field strength?  Then one could at least check what were the culprits for RF, and whether one had reduced it (the link to audio effect remaining moot.)

Maybe one would need a better meter because the ones I'm thinking of were only intended to deal with a 30 MHz signal. I suppose the thing for me to do is try it, but my daft mate with a raised Toyota Landcruiser has it (round here we need to tackle the odd elk-hit etc and a radio comes in handy, so he says).

Just a thought,

SteveC