Hi all, thank you for the responses.
I've tried swapping outputs from the offending amp and the noise travels with the connections. Tried swapping the inputs but that made no difference. This with no pre amp on so no signal coming from it.
Suspect its a noisy transistor, what do you think? Would anyone have a scematic for an LK100? Would be very useful I think.
Another question . . .
I have this setup in a room measuring 3.5m x 2.5m with speakers facing across the shorter dimension. Within this room I have a desk, a bookcase, a unit contain 200 lp's, 150 10.5" tapes, three tape decks and a multitude of other stereo equipment. You see by now that space a at a premium. Now, the pair of Kabers are connected to the three LK100's with lengths of K600 Cables and obligitory Linn RCA Blacks. To get the K600 to each unit can be likened to wrestling with a hungry boa constrictor! As I've now had to disconnect the LK100's I'm seriously thinking 'should I be considering swapping this lot for a smaller pair of passive speakers' if so, what kind? (The pre is a Linn Wakonda, recently acquired following recommendations from here (thank you Linfo) and I'm very happy with it.)
Temporarily, I've just rigged up a pair of Tascam VL-X5 studio monitors which are activ with internal power amps and they don't sound too bad. Don't get me wrong, the Kabers sound great but they do take up a lot of space taking into account the amps and cables.
What do you think? Ideas/Suggestions please.