Any combination of grounding wire,
or no
wire, makes no difference, the QRM is directly radiated. If
you see my
"shack" there's just enough room to sit by the desk so I can't
rearrange equipment any better. "Cosy" would be a nice
description.
The laptop is usually OK but it is charged by time switch
about every
2.5 hours and when fully charged, if the timer is still, on it
can wipe
10 to 20dB s/n off the signal in spite of having a linear
charger.
73, Hugh, M0DSZ
On 12/10/2016 15:37, Claudio Pozzi wrote:
On Tuesday 11
October
2016 20:38:07 you wrote:
> To avoid having
laptop running in the shack, which occasionally
> produces some
QRM, I
can send received audio from the shack to a
> desktop
computer in
the house on a twisted telephone pair. This works
> but any wire
connection between shack and this desktop introduces some
> spurious
signals on
136khz even if I use an audio isolating transformer.
>
The AC 230 power
supply
in the shack and the desktop computer grounding wire are
equipotential,
share the same grounding system?
73 de Claudio ik2pii
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