You would get a lot more useful answers on rec.radio.shortwave.

"m" wrote in message
news
thanks for the input!

the antenna I ve started in a 60 ft. 14g. copper wire, up in the trees
away from the house. I,d like to feed this into the house with rg58. my
radio tunes continuosly from 3 to 30 K, but I have also been mucking
around with some crystal sets which are more limited.

I,ve read that the antenna impedance is likely to be around 450 ohms,
which would be fine staight to the antenna connection on the receiver I
guess, but I would like to use the coax to protect the signal from all
nasty stuff my house generates (and to protect the house from the
potentially nasty stuff my antenna might!). So I would like the signal
to go from 450-ish to 50 and back to around 500...

Thanks again...and dont worry about me not having fun...
Mike