[Amps] High SWR was SB-1000 tuning question

Jeff Carter amps at hidden-valley.com
Wed Apr 22 13:06:47 PDT 2009


I feel this way, too.  I have a SB-220, but I only run it on 80m
because that's the only place I have a 1:1 SWR.

I have other antennas, but none of them give me a good enough match
for me to feel confident running power into them.  If I remember the
math correctly, a 2:1 mismatch at 900 watts means 90 watts is coming
back down the line at you, and I just can't imagine that ever being a
good thing.

So, I run barefoot on the other bands.  The good news is I mostly work
digital modes and PSK31 is wildly efficient for the contacts I expect
to be able to make.

Jeff/KD4RBG

---- Original message ----
>Date: Wed, 22 Apr 2009 14:43:02 -0500
>From: "KB0NLY" <kb0nly at mchsi.com>
>Subject: Re: [Amps] SB-1000 tuning question
>To: <amps at contesting.com>
>
>5:1?  Why even bother running an amp if your SWR is that high.  That's a lot
>of reflected power back into the shack and on your feedline.
>
>I know a guy that runs an amp with a huge antenna mismatch and guys that
>hear me at 100w with a properly tuned antenna can't hear him for crap.  He
>isn't making efficient use of his power.  Run all the power you want, but
>there is no substitute for a good antenna to connect to it.
>
>Scott


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