Antenna Analyser - Phase Angle Sensor

[Julius Fazekas n2wn]

Stuart,

In the old Ham Radio Magazine, a 1988/89 issue there
is a very simple circuit called a PHASOMETER by the
author. It uses as zero center meter (although you
could set up LEDs to perform the same way) to
determine which side of resonance your antenna on.

The specific purpose for this unit was for determining
which way to skew your inductor to tune your mobile
antenna. The author was going to incorporate it with
an earlier motor driven inductor. He also suggested it
as a tool for vision impaired folks.

I thought that it would be useful for increasing
bandwidth tuning for a low band antenna.

If you're interested, I can find the article when I am
back home sunday and make a copy. I have the article
for the mobile tuner as well.

Cheers,
Julius
n2wn
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[David Cutter]

I fancied doing this for my screwdriver antenna but I thought I could do something similar without actually detecting polarity:  simply, if I guess wrong the SWR will go the wrong way and I just have to reverse the switch; which could be done automatically.  I'd like to see the article to avoid the extra step.

73

David
G3UNA

>
> From: J F <[hidden email]>
> Date: 2007/03/16 Fri PM 12:02:58 GMT
> To: [hidden email],
> Elecraft Discussion List <[hidden email]>
> Subject: [Elecraft] Antenna Analyser - Phase Angle Sensor
>
> Stuart,
>
> In the old Ham Radio Magazine, a 1988/89 issue there
> is a very simple circuit called a PHASOMETER by the
> author. It uses as zero center meter (although you
> could set up LEDs to perform the same way) to
> determine which side of resonance your antenna on.
>
> The specific purpose for this unit was for determining
> which way to skew your inductor to tune your mobile
> antenna. The author was going to incorporate it with
> an earlier motor driven inductor. He also suggested it
> as a tool for vision impaired folks.
>
> I thought that it would be useful for increasing
> bandwidth tuning for a low band antenna.
>
> If you're interested, I can find the article when I am
> back home sunday and make a copy. I have the article
> for the mobile tuner as well.
>
> Cheers,
> Julius
> n2wn
> _______________________________________________
> Elecraft mailing list
> Post to: [hidden email]
> You must be a subscriber to post to the list.
> Subscriber Info (Addr. Change, sub, unsub etc.):
>  http://mailman.qth.net/mailman/listinfo/elecraft   
>
> Help: http://mailman.qth.net/subscribers.htm
> Elecraft web page: http://www.elecraft.com
>

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