Quoting "Meindert Sprang"SNIP
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


Thanks, that's helpful. I got another suggestion off-list that shielding the
brick in a grounded steel box might help but given the brick's small size I
guess I will start with your ferrite sugesstion. Any suggestions on the best
source for apppropriate ferrite ring cores? In browsing online cataologues
this HF radio novice has found a bewildering variety of ferrite devices and
materials. I agree that my next task is to find a local radio ham and get
some hands-on help.
Thanks, Scott