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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