To: | "David Robbins K1TTT" <k1ttt@arrl.net>,"'Marc Wullaert'" <marc.wullaert3@pandora.be>,"'Tim Holmes'" <W8TAH@Zoominternet.net>, <TowerTalk@contesting.com> |
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Subject: | RE: [TowerTalk] Cable TV hardline question |
From: | Pete Smith <n4zr@contesting.com> |
Date: | Fri, 29 Oct 2004 08:29:42 -0400 |
List-post: | <mailto:towertalk@contesting.com> |
The calculated losses, using TLW, show why Dave's right. For 300 feet of
1/2 inch hardline at 432 MHz, with 50 ohm antenna and source, the apparent
SWR will be 1.25:1, and there will be 6.567 dB of loss in the feedline, of
which .768 dB will be due to the mismatch. For 100 feet, the SWR will be
1.74:1, with 2.4 dB of loss, of which .5 dB will be due to the mismatch. 73, Pete N4ZR At 07:54 AM 10/29/2004, David Robbins K1TTT wrote: > you van use catv cable on your antennes buth you have to make 1/4 wave > transformer > from 60-62ohms coax to the antenna. _______________________________________________ See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions and ask for Sherman, W2FLA. _______________________________________________ TowerTalk mailing list TowerTalk@contesting.com http://lists.contesting.com/mailman/listinfo/towertalk |
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