A basic swr circuit just rectifies some rf and turns it into dc to run through a
meter. As far as I know it's got nothing to do with the antenna or swr itself.
It's just a basically a power supply that runs the meter and the rf is the
source.
"George, W5YR" wrote:
> Steve, except when it (correctly) reads 1:1, doesn't an SWR meter always
> have to contend with "complex impedances?"
>
> Even if the antenna impedance is purely resistive, if the input Z of the
> antenna doesn't agree with the Zo of the feedline, then the SWR will not
> be 1:1. And the input Z to the line will be complex. In the real world,
> the input Z to any feedline is almost always guaranteed to be complex,
> even at "resonance" for the antenna.
>
> What am I missing here?
>
> 72/73, George W5YR - the Yellow Rose of Texas NETXQRP 6
> Fairview, TX 30 mi NE Dallas in Collin county QRP-L 1373
> Amateur Radio W5YR, in the 55th year and it just keeps getting better!
> Icom IC-756 PRO #02121 (9/00) Kachina #91900556 (12/99) IC-765 (6/90)
>
> Steve Ellington wrote:
> >
> > It would be interesting to see what the difference is between the two swr
> > meter circuits. I've never felt the swr meters in TenTec's equipment were
> > very accurate when dealing with complex impedances.
> > Right now, the score is even between the two. We have two TenTecs reading
> > the same value and one antenna/Kenwood combo telling us another story. I
> > suppose you could bring in a 3rd party in the form of another swr meter or
> > better yet, one of the newer antenna analyzers such as the AEA or MFJ's.
> > With these you should be able to find out what's really going on. Meanwhile,
> > as long as your Omni six isn't drawing too much current, you have nothing to
> > fear.
> >
> > BTW: Thanks for the "on topic" subject. I've been seeing far too off topic
> > post on here lately.
> >
> > Steve
> > N4LQ
>
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