Re: Need help-SWR increases with power...

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From: Phil Wheeler (w7ox@earthlink.net)
Date: Wed Dec 27 2000 - 16:09:53 CST


Steve Hanson wrote:
>
> Why does my SWR reading increase when I increase power? For example, on 40M
> at 4 watts into my untuned 130' dipole, SWR reading, both on my TT 580
> Delta, and on outboard Kenwood meter is abt 1.2, BUT, if I increase power
> to, say 80 watts, My SWR will go up to about 2.5+. I can tune the ant. to
> bring it back down, but why does it go up with power? Will I blow my finals
> if I continue to run at 4 watts to untuned ant with both meters reading 1.2?
>

Not enough data in your message re the meters, Steve. But if you have a
meter capable of measuring power/SWR for 0-100 W for example, its
reading will be more accurate at the high end of the scale (e.g., 80 W
vs. 4 W).

But are these meters single scale, or are you switching scales when you
make the readings? If multiple scales, what is Full Scale in each case
(accuracy is usually in % of FS)?

73, Phil W7OX


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