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Date: | Thu, 2 May 2013 20:49:59 -0600 |
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can you describe the basic design and construction of the antenna?
IE element length and feedline length?
I've never experimented with a doubllet style and wouldn't mind trying it.
73
Colin, V A6BKX
----- Original Message -----
From: "Ian Westerland" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Thursday, May 02, 2013 8:28 PM
Subject: Doublet Antenna
> Hello to all on the list. Someone posted a question about doublet
> antennas a couple of days ago and i have just made one for multi band
> operation between 80 and 10 meters. It has been a challenge but the
> results so far are really better than I thought they would be.
>
> The antenna is cut for a low frequency of 3.58 megahertz in our 80
> meter band, fed with 300 Ohm feed line, through a 4:1 balun into an
> LDG TK-100 tuner. The results on 80 meters are the best I have had
> from any antenna used so far including the standard coaxial fed
> dipole although there seems no real reason why this should be the
> case. Maybe it is the lower loss feed line doing the job.
>
> I have encountered problems on 40 meters that seem to be related to
> the length of the feed line but results are improving with a little
> fine tuning and experimentation with feed line length. The doublet
> is 9 meteres off the ground at present, but during next week it will
> be raised by another 3 meters so it will be 12 meters or 40 feet at its
> apex.
>
> I will post to the list again on the doublet when I complete the
> project but at present, even though it is not at its optimum, I am
> more than happy with its performance on both transmit and receive.
>
> Ian Westerland, VK3vin
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