On 28 Dec 2005 09:42:45 -0800, "Ben Sinclair"
wrote:

I think a solution is to connect the random wire to shielded coax and
run that from the attic to the basement and hopefully that will reduce
interference.

Hi Ben,

Sounds like the right answer, short of putting your antenna outside
(with the same shielded coax).

I think I need to use an impedance matcher to connect the
wire to the coax, like this one:
http://www.shortwavestore.com/sws/pr...5&cat=0&page=1

Will do nothing for noise that you haven't already accomplished with
the coax. Further, it says nothing of what's inside, nor offers any
specifications - just marketing snake-oil.

You could also choose to "choke" the end of the coax by using ferrites
in any of several forms. Research W2DU style BalUns on google and pay
attention to the theory of their operation.

Also, obtaining a very cheap ham 3 knob antenna tuner (without meters)
will perform all the matching you could wish for AND it will eliminate
the most common form of desensing for SWL (front end overload from out
of band transmitters - your friendly neighborhood AM station being
most often the culprit).

73's
Richard Clark, KB7QHC