I have a new Icom R-75 and have some newbie antenna questions. I have a
random length wire in the length my attic, and the receiver is located
in the basement.

The R-75 has a two antenna inputs. One coax, and one for a wire with a
ground input. I attached my random wire to the wire antenna input and
it seems to work, but there is a high level of noise on everything,
even WWV stations. Connecting the ground to my house's ground doesn't
make any difference.

I'd think the problem is that I have an antenna that has to snake
around the house, near electrical wires, computers, lights, etc. that
are causing interference.

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. 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

Does this all sound right, or is there a better way to do this? With
the random wire connected directly to the receiver, I can pick up a
lot, but it's very noisy.

Thanks!