[Elecraft] K3 - Numeric SWR Display

[Bill W5WVO]

That was the point I was trying to make originally. However, to be
fair, the feedline loss generated by SWR is significant only where
the loss is substantial enough to make a meaningful difference. At
HF, particularly the lower bands, the SWR loss is, from a
practical standpoint, insignificant.

However, I'm a VHF weak-signal operator, and I tend to think in
those terms. Having a non-reactive load at the feedpoint is
important at VHF/UHF, as feedline losses due to SWR can be
significant on both transmit and receive.

Bill W5WVO


----- Original Message ----- 
From: "Darwin, Keith" <Keith.Darwin at goodrich.com>
To: "LIST - elecraft" <elecraft at mailman.qth.net>
Sent: Thursday, September 18, 2008 8:40 AM
Subject: RE: [Elecraft] K3 - Numeric SWR Display


> -----Original Message-----
> From: elecraft-bounces at mailman.qth.net
> [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Charles
Morrison
>
> Since I don't plan on hanging off the side of the tower to
operate my
> station, isn't it more prudent to tune the entire "system",
flaws,
> feedline and all if my main concern is what SWR my equipment, in
my
> shack, sees?
>
> ------------------------
>
> No it isn't.  If you're using 50 ohm coax and an antenna that is
not 50
> ohms resistive, you'll set up standing waves in the coax which
will
> result in signal loss.  Having a tuner at the rig will protect
the rig
> from the effects of the standing waves, but the line loss will
still be
> there.
>
> Far better is to have the tuner at the actual antenna feed point
(or to
> adjust the antenna to be 50 ohm resistive).  Then you'll have a
happy
> rig AND minimal loss in the coax.
>
> - Keith N1AS -
> - K3 711 -
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