[TenTec] FW: [Fwd: Feedline loss calculator]

[Ron Zond]

Hi

And of course, Bob doesn't run his balanced feedline close to metal or other
unbalancing objects.

Ron
K3MIY

-----Original Message-----
From: tentec-bounces at contesting.com
[mailto:tentec-bounces at contesting.com]On Behalf Of Robert & Linda McGraw
K4TAX
Sent: Friday, October 07, 2005 10:52 AM
To: Discussion of Ten-Tec Equipment
Subject: Re: [TenTec] FW: [Fwd: Feedline loss calculator]


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 at hotmail.com>
To: <tentec at 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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