On Mon, 03 May 2004 12:33:03 GMT, "BigWallop"
wrote:

If you have the wire that was connected to outer casing on the modulator and
now connected it to the centre pin of the phono plug, then you've definitely
got the wrong wires connected.

OK I've finally cracked it - the wiring was correct, but one of the
ground connections was loose in the connector block.

Many thanks for all your help - and for your patience with a novice!