RE: [TowerTalk] Cable TV hardline question

[Pete Smith <n4zr@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.
>
> 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@arrl.net
> web: http://www.k1ttt.net
> AR-Cluster node: 145.69MHz or telnet://dxc.k1ttt.net
>
>
>
>
> _______________________________________________
>
> 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.
>
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_______________________________________________

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.

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