[TowerTalk] Cable TV hardline question
Tim Holmes
W8TAH at Zoominternet.net
Fri Oct 29 11:33:28 EDT 2004
Yeah, thats what I was worrying about-- If anyone has any good
suggestions, I would love to hear them, I hate to have this stuff just
sitting around, not doing anything.
Tim
>I would be concerned also, since the cable can cause an SWR
>of over 2:1 at the radio.
>Most VHF and UHF radios do not tolerate such a high SWR this
>very well.
>
>What you can do is build a transformer using lengths of 50
>and 75 ohm cable mixed. It is pretty tricky to do this at
>UHF, but it can be done if you have the test gear and are
>careful. I don't have references, but I'd bet someone else
>does. The devices are called non-synchronous transformers.
>
>I certainly look into matching the cable at VHF or UHF, not
>because of cable loss but because of bandwidth and impedance
>problems at the radio. A 2:1 SWR is not good for most
>radios.
>
>73 Tom
>
>
>
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