Lostgallifreyan wrote:
Jeff wrote in :

As a matter of interest why are you looking at 75ohm cable, when most
people and equipment use 50ohm.


Good point, though last I read of that, it was the other way round.
(Depends on context). At least, most times I had a device that needed RF
coax, it specified 75 ohms if it didn't come with cables made for it. In my
current case, it's not clearly known what other impedances are involved in
an SWL setup, but they're almost certainly higher than 75 ohms, so going for
a 50 ohm coax seems unwise.

Virtually all radio equipment is standardized on 50 ohms, with the
exception of CATV etc.

Any receiving equipment you get will almost certainly have a 50 ohm
(nominal!) input, so any higher antenna impedances will need to be
matched back to 50ohms anyway. How much loss you will encounter by using
75ohm cable will depend on the actual set up.

Jeff