[TowerTalk] 75ohm cable
Grant Saviers
grants2 at pacbell.net
Mon Jul 19 13:54:13 PDT 2010
Lucky you! I moved and lost my source.
You can use a coax matching section at the antenna if they are
monobanders, this works fine and you need a flexible loop anyway. I ran
7/8" CATV hardline 350' to a 2m yagi with a very good match. The
calculations are in most every handbook. The transmitter mismatch
should not be a problem. A no tune semiconductor linear may foldback
with 75 ohms but it would be a finicky one. Any PI network linear should
work fine.
This hardline also makes superb low loss broadband dipoles, using the
shield as the element and the (usually copperweld) center conductor as
the messenger wire.
The compression plumbing fittings are the cheapest way to adapt to PL's.
Grant, KZ1W
Carol Richards wrote:
> I am the proud recipent of numerous rolls of 75 ohm, 1/2 in CATV cable. Since all of my antennas require 250ft or mor runs this is a real blessing. I have a few questions before I start replacing the RG 213.
>
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