[Antennas] need help with a 6 m quad
AA6DX
[email protected]
Wed, 2 Jul 2003 11:12:20 -0700
It would seem your antenna's driven element is overall about 6 inches too
short ....
Try here for some good advice...
http://www.packetradio.com/ant.htm#designqd
73, Mark .. AA6DX CN70wt
----- Original Message -----
From: "Tim Holmes" <[email protected]>
To: <[email protected]>
Sent: Wednesday, July 02, 2003 9:51 AM
Subject: [Antennas] need help with a 6 m quad
> Hello:
>> I am a new subscriber to this list, and I have a problem
>> I built a 6m quad from the directions at a web site, which (Naturally) I
> cannot now find. When I assemble the antenna, the driven element has
> spreader lenghts of 83 21/32 inches, for a side length of 58.5 inches.
> The reflector has spreaders that are 88 inches long and the side lengths
are
> 61.3 inches. The center boom is slightly over 2 feet long and the
elements
> are spaced exactly 23 1/2 inches apart. The boom is made of 2 inch pvc and
> the spreaders are 1/2id pvc (NOT CPVC) The antenna is direct fed (no
match)
> with coax at the bottom of the driven element, which is not connected at
the
> bottom. According to my modeling, the antenna should yield a theroetical
> gain of about 8.6 dBi. The following values also come out of the MMANA
> program
>> For Frequency 50.200
> R (Ohm) =20.963
> jX (Ohm) = -154.411
> SWR 50 = 21.51
>>> Then elements are made of stranded copper wire uninsulated purchsed from
> Radio shack as antenna wire.
>> The problem is that I cannot get this antenna to tune up for anything.
When
> I put the antenna analyzer on it, the swr is infinate through the entire
6m
> band. It begins to come down to about 2.5 around 160 mHz (above the 2
meter
> band).
>> I am not real experienced building antennas, and I am totally stumped on
> this one, I have tried everything that I can think of, and I need some
> advice
>> thanks for your help
>> Tim Holmes -W8TAH - Extra Class Operator
> Medina County Ohio EN91CD
> StormNet Chase 9
> Medina County Skywarn
> Medina County AEC
> 147.030 PL 141.3
>> - - -
>> Your moderator for this list is:
> Larry Wilson KE1HZ [email protected]
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