[TowerTalk] Cable TV hardline question

[Pete Smith]

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.
>
>No you don't.  I use 75 ohm here for 160m through 70cm with runs up to
>350' with no transformers and no problems on any band.
>
>
>David Robbins K1TTT
>e-mail: mailto:k1ttt at arrl.net
>web: http://www.k1ttt.net
>AR-Cluster node: 145.69MHz or telnet://dxc.k1ttt.net
>
>
>
>
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