On 07/03/2015 12:57, Johny B Good wrote:


It looks like you've cracked the problem then. You'll probably just
need to rewire using quality cable and connectors to convert your
'workaround' solution into a permanent fix.


I've now got to the stage of trying a test record and immediately found
several issues. The two most important are wiring errors resulting in
L-R reversal and a phase reversal on the left channel. In other words,
it's a pigs ear. Tone arm wire colours are correct so the errors must be
where they connect to the external phono leads. I could correct by
swapping cartridge connectors around but I may as well do it properly
and make the hum fix permanent at the same time.