[sdiy] Case shielding

[harrybissell]

Its a good idea, but less of a good idea than shielding
guitars.

The guitar pickups are usually quite high impedance... and subject
to noise coupling into them by capacitance. Your body (hey dude,
nice antenna) can capacitively couple to the wiring easily.

Synths are usually not that close to the body, run much higher
signal levels, and in a lot of cases have sensitive circuits on
or near ground planes.  A metal cased synth will still be quieter
(usually) than one in wood, or plastic. At 10V signal levels you
are not likely to notice.

Guitar shielding cannot stop magnetic inteference... usually the
shileds are copper or brass. They only stop capacitive or high
frequency (RFI) pickup.

DO NOT try to shield your pickups with magnetic materials such as
MuMetal... you will be very unhappy when the field (which should reach
the
strings)... doesn't reach the strings.

H^) harry

Pete Niedermayr wrote:
> 
> I'm doing some work on a couple electric guitars and
> in the process of shielding the body cavities.
> 
> I'm wondering is shielding synth cases a good idea?