Robert11 wrote:


In a practical sense, do you experts believe I would see any
difference between 50 or 75 ohm coax for a receive only situation at
the 30 MHz and lower listening freq's (150 foot coax run) ?

For "receive only" and from a practical viewpoint, no difference at all.

For the 75 ohm stuff, talk to your local cable company; many times you
can get some of their buried drop quite cheaply... Good luck!