This is one of the reasons that I do not like the idea of running coax from
the tuner to the outside where it is then connected to a balun for the
purpose of using a balanced feed system. Oh I realize that the coax run is
short but at high SWR values coax gets very lossey. From my point of view I
rather deal with the balanced line, and it's not near as critical as most
think, all the way from the antenna feed point to the tuner/balun output.
I believe in extrapolating every tenth of a dB in performance out of a
system.
73
Bob, K4TAX
----- Original Message -----
From: "Rob Atkinson K5UJ" <k5uj@hotmail.com>
To: <tentec@contesting.com>
Sent: Thursday, October 06, 2005 4:18 PM
Subject: [TenTec] FW: [Fwd: Feedline loss calculator]
> this was posted to tower talk reflector--it is a pretty cool calculator
> that
> lets you compare losses of different feedlines keeping other conditions
> constant. compare for example the loss of 600 ohm open wire feed with
> that
> of RG213 on 7 mhz, for 100 feet and swr of 10:1
> It may open your eyes about losses in your lines, especially on low
> frequencies, that you may have assumed were negligible, even at low swr.
>
> http://www.ocarc.ca/coax.htm
>
> rob/k5uj
>
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