Miguel,
If you have a good antenna that is properly matched, and a duplexer that
is properly tuned, your primary concern is to minimize the attenuation
in the feedline between the duplexer and the antenna. A good rule of
thumb is to select your feedline so that the loss at the higher of the
two frequencies in your repeater pair is no more than 1.0 dB.
You didn't state how long your feedline must be, but I can make some
suggestions. For a 70cm repeater, use 1/2" foam for a 50 foot run, 7/8"
foam for a 100 foot run, and 1.25" foam for a 150 foot run.
Keep in mind that a repeater's range is usually limited by its ability
to "hear" the users, not by its power output. Minimizing the
attenuation of the received signal due to feedline loss is one of the
least expensive ways to maximize talk-in range.
73, Eric Lemmon WB6FLY
Miguel wrote:
>
> Hello everyone
>
> thanks for reading my post..
>
> I have a uhf repeater in the ham band... I want to know which is a
> good cable coax to use to minimized the swr and good communications..
>
> some people tell me the lmr-400 others the rg-213
>
> but which one is better or is there something else...
>
> thanks
>
> 73
>
> Miguel,Ai4em
>
>
> Yahoo! Groups Links
>
>
>
>
Yahoo! Groups Links
<*> To visit your group on the web, go to:
http://groups.yahoo.com/group/Repeater-Builder/
<*> To unsubscribe from this group, send an email to:
[EMAIL PROTECTED]
<*> Your use of Yahoo! Groups is subject to:
http://docs.yahoo.com/info/terms/
