In article ,
wrote:
Well, I don't know the solution in this case. But I know one thing. A
low output pickup, as all modern ones are, with 2 ohm impedance is giong
to be a major nightmare to keep quiet. Such a system will need a far
better standard of screening than usual for 50k pickups.

I used it before with the supplied transformer which went at the amp end.
There was some hum - but about par for the course with any pickup. Better
than some, like the Decca FFSS.

I can only think of one reason to go with 2 ohms, using a ribbon
transducer. Why do that with mc?

I suppose the more the number of turns, the greater the mass.

I am wondering what the shell of the pickup is connected to. With 50k
pickups it goes to one of the ground output pins, with a balanced setup
it would need separate connection to amp ground. Does the arm provide
for that?

The shell simply grounds to the arm. There is a separate ground wire which
comes out of the arm. I dunno where that is connected inside the arm - but
adding another makes no difference.

I forget what your screening arrangements are, but I'd want to check
they're watertight all over. All cables need a dense screen, maybe foil
and braid, audio plugs should be screened, and the leads to the
cartridge in the headshell should be screened somehow - perhaps a little
copper foil cover.

The leads within the shell are unscreened. But if they were picking up the
hum I'd expect moving the pickup around to alter the hum?

--
*El nino made me do it

Dave Plowman London SW
To e-mail, change noise into sound.