[Elecraft] Computer noise problem

[Bozidar Benc]

Oh well, I understand now. :-))

It seems that for some reason the coax choke I had (look at my previous
post) didn't act as I supposed it will.

Thanks a lot for the explanation.

73, Bole, 9A3RR

> Before you added the counterpoise, the shield on the RG58 was acting as
> part of the antenna.  Since the coax ran close to the PC, it picked up
> noise.  After you added the counterpoise, the coax shield was decoupled
> from the antenna (the counterpoise was an odd multiple of 1/4 wavelength
> on 40 meters, so it effectively 'grounds' the coax shield).
>
> Good demonstration of a useful principle!
>
> Vic K2VCO