Topband: Tides and SWR

[Hugh Valentine]

Here are a few photos:Link:     http://n1bug.com/host/val/

---------- Original Message ----------
From: Bill Wichers <billw at waveform.net>
To: Hugh Valentine <hsvdds at juno.com>
Subject: RE: Topband: Tides and SWR
Date: Tue, 16 Sep 2014 20:17:35 +0000

You could make a simple adjustable piston-type capacitor with some nested pieces of PVC pipe and a float. I don't know if you'd actually want to try that, but it would probably be a fairly simple mechanism to implement. Personally, I think a motor-driven arrangement would be better so that you wouldn't be at the mercy of the tide.

Interesting info too -- thanks for sharing. I would not have guessed at the amount of difference you're seeing between high and low tide.

Do you have a pic of this antenna somewhere? IT would help to get an idea of the arrangement for anyone trying to determine the "why" to your changes.

  -Bill

> with this information, I don't know.  Maybe I now need a r
> 
>  emote tuning device which is Tide Controlled. See you in the pileups with
> the lowest antenna on Top band this season.P.S.  The Birdfeeder now comes
> in a New and Improved version using an LC circuit and Vacuum Relay to make
> it switchable 1/2 wave on 80M.  The Tide also lowers SWR on 80M as well at
> high tides. ValN4RJ
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