I'm impressed that anaconda's have such long pekers, though I don't envy the folk who's job it is to collect them !!!
Thanks for the advice on both the polarity and wire lengths. I'll be back home on Friday and check as I suspect that this has not previously been considered. The wires are around 5 feet so I will experiment with these at the same time.
If this approach doesn't work I'll dip into the pocket for the line stage amp as suggested.
Thanks again for the great advice.
Cheers