Coax cable used for DC instrumentation
"Robert Macy"
"Phil Allison"
** Only true where the source has a common ground path with the
receiving
device and an earth loop is created by the shield.
For a floating source, like a microphone, co-axial cable works just as
well
as STP despite not being balanced.
This is not a very well known fact and derives from the inherent
symmetry
of
co-axial cable which rejects external magnetic field induction in a
similar
way twisting a pair of wires does.
However, in general, STP will be better:
Floating mike, somewhat reasonable, except...
1 if a person holds the mike, there is a connection to 'gnd', which
creates a gnd loop.
** ROTFL !!
You are a real scream - pal.
One red hot ****ing nut case.
2 if the shield is not terminated as a total and complete envelope
wrapped around ALL internals of the mike,
** Mics do tend to be wrapped in metal cases with metal mesh over the
capsule.
You must have a look at one sometime.
If you ever stop wanking.
1 prefer to stick to technical dicussions,
** ROTFL - you are nothing but a rabid nut case.
**** off.
..... Phil
|