[TowerTalk] A3S Tuning Question

[Steve Katz]

Tom, I agree and I've tested HF beams only a few feet above ground with the boom vertical and "aimed" towards the sky.  Usually I've accomplished that by laying the reflector across a couple of wooden saw horses and propping the boom up against an elevated wooden deck.

The "tuning" usually does come out about the same as having the antenna installed up much higher, at its final resting place.

If your A3S is resonating below the bands on all bands, sounds like you need to shorten the tubing length between the boom and the first (10m) traps.  However be really sure the traps are installed in the correct positions and are oriented the correct way before changing tubing lengths!

I've installed a few A3S's over the years and never had to change the dimensions from the factory recommendations, but then that was several years ago.  Possibly they factory goofed since then and something's wrong with the traps, or any number of variables.

73

Steve WB2WIK/6

-----Original Message-----
From: towertalk-bounces at contesting.com
[mailto:towertalk-bounces at contesting.com]On Behalf Of mrlogs
Sent: Thursday, March 19, 2009 8:37 AM
To: towertalk at contesting.com
Subject: [TowerTalk] A3S Tuning Question


They said, in the manual..you could test it facing up a few feet off the ground...Haven't done it at 40 ft yet,,
                Tom  N3ZC
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