"scott" jsodellatgmail.com wrote in message
...
I've just installed an ICOM 802 in my boat and today found that the only
way
to get clean noise-free weatherfax reception on my Sony VAIO laptop is to
disconnect the "power brick" and run the laptop on batteries alone.
There
are some other interference sources, especially the radar, but the laptop
is
the most inconvenient problem at the moment. Any suggestions as to how to
reduce or eliminate RF interference from a VAIO power brick?

RF noise on HF frequencies need an antenna to be radiated and the antennae
in this case are the power cords to and from the power brick. The power
brick itself has to small dimensions to radiate sufficiently on HF. So all
you need is to block the RF through the power cords. This can be done by
running the cords through ferrite ring cores. Run each cord through a ring
core, 10 loops or so. Ferrite clamps are mostly not so effective at HF, but
more at VHF. You could try and find a radio ham in your neighborhood, they
deal with these issues more often.

Meindert