I have been using a quad since 1967. And never looked back! The first one
was a two element quad made by Gotham (Anyone remember that company?) And a
snowstorm took that one down the weekend of the ARRL DX cw contest in 1968.
Since then, have used a Gem Quad with great sucess in the contests over the
years. Only need FR/G to be on "top of the honor roll." Have a three
element in the air now and have a four element Gem quad in the rafters in
our garage. Only thing I have every done is use coax matching xfmrs on the
the three driven elements with a remote heathkit antenna swtich. 73 es gud
dx. Van, K7VS in Medford, Oregon
----- Original Message -----
From: <steve.root@culligan4water.com>
To: <cq-contest@contesting.com>
Sent: Sunday, August 26, 2007 10:08 AM
Subject: Re: [CQ-Contest] A3S or TH3JR or....a QUAD!
> Having used Quads for the last several decades I have to admit that I'm
> enjoying the direction this thread has taken. Sometime I feel like the
> last guy on Earth using a Quad.....
> Regarding element dimensions, the antenna described in recent ARRL Antenna
> handbooks ("A Two-Element, 8 foot boom Pentaband Quad" page 12-8 ARRL
> Antenna Handbook 19th edition) works very well. I helped K0XN construct a
> two element Quad and then we spent a lot of time tuning it. When ARRL
> version was first published, I found to my surprise that their computer
> generated dimensions were within 1% of the dimensions that we had dervied
> experimentally. I'm currently using the same antenna at 55 feet and have
> been very happy with it's performance. One note of caution here....the
> published dimensions are for bare wire. If you use insulated wire (to
> protect against polutants, salt, etc.) be aware that insulated wire has a
> slower velocity factor than bare wire. The effect is on the order of 2%.
> 73 Steve K0SR
>
>
>
>
>>-----Original Message-----
>>From: David Pruett [mailto:k8cc@comcast.net]
>>Sent: Saturday, August 25, 2007 11:37 PM
>>Cc: cq-contest@contesting.com
>>Subject: Re: [CQ-Contest] A3S or TH3JR or....a QUAD!
>>
>>K9TM and I used a GemQuad kit for the 20-15-10 antenna at the little
>>station we've assembled down on St. Croix, and we have been very pleased
>>with it's performance. However, we found through computer modeling that
>>GemQuad's element lengths are not correct. We modified GemQuad's
>>lengths in K6STI's NEC-for-Wires program to get the F/B and SWR centered
>>on the band, then we built the quad with those lengths and the SWR curve
>>is very, very close to the model prediction. The antenna has been up
>>now for almost two years and has produced two world top 10s in the
>>multi-single category of WPX SSB and the #2 SOHP score in SS phone. Not
>>bad for an antenna with an 8' boom.
>>
>>The GemQuad hardware (spreaders and mounting spiders) appear substantial
>>and of good quality. Like any quad, wire flexing at the corners had to
>>be addressed, but so far we've been very happy with the antenna.
>>
>>Dave/K8CC
>>
>>
>>Dan Violette wrote:
>>> Looks like GemQuad is still available out of Canada:
>>> http://www.gemquad.com/
>>> Boomless Quad and an excellent performer, I used for many years in the
>>> 80's.
>>> Each band more optimally spaced in this arrangement.
>>>
>>> Dan KI6X
>>>
>>> -----Original Message-----
>>> From: cq-contest-bounces@contesting.com
>>> [mailto:cq-contest-bounces@contesting.com] On Behalf Of N7MAL
>>> Sent: Saturday, August 25, 2007 3:54 PM
>>> To: Dale Putnam; kr2q@optonline.net; cq-contest@contesting.com
>>> Subject: Re: [CQ-Contest] A3S or TH3JR or....a QUAD!
>>>
>>> Dale have you looked at Cubex.?.?.?. Since lightening bolt went out of
>>> business Cubex is the only mfr left...
>>> again my -2cents worth
>>> 73
>>>
>>>
>>> MAL
>>> N7MAL
>>> BULLHEAD CITY, AZ
>>> http://www.n7mal.com
>>>
>>> ----- Original Message -----
>>> From: Dale Putnam
>>> To: kr2q@optonline.net ; cq-contest@contesting.com
>>> Sent: Saturday, August 25, 2007 13:37
>>> Subject: Re: [CQ-Contest] A3S or TH3JR or....a QUAD!
>>>
>>>
>>>
>>> Now you're talking... the best 20-10 mtr antenna had here has been a 2
>>> el.
>>>
>>> Hy-gain 244 quad,
>>> have been looking for another for a long time... since the tower came
>>> down
>>>
>>> after a guy line failure, in near 100 mph wind. Have new tower, need 244
>>> for
>>>
>>> top. The quad out performed the three ele yagi, almost every time, only
>>> exception is when working close in. and not backscatter.
>>> That was better with the quad.
>>> --... ...--Dale - WC7S in Wy
>>> _________________________________________________________________
>>> Connect to the next generation of MSN Messenger
>>>
>>> http://imagine-msn.com/messenger/launch80/default.aspx?locale=en-us&source=w
>>> lmailtagline
>>> _______________________________________________
>>> CQ-Contest mailing list
>>> CQ-Contest@contesting.com
>>> http://lists.contesting.com/mailman/listinfo/cq-contest
>>> _______________________________________________
>>> CQ-Contest mailing list
>>> CQ-Contest@contesting.com
>>> http://lists.contesting.com/mailman/listinfo/cq-contest
>>>
>>> _______________________________________________
>>> CQ-Contest mailing list
>>> CQ-Contest@contesting.com
>>> http://lists.contesting.com/mailman/listinfo/cq-contest
>>>
>>>
>>>
>>
>>
>>_______________________________________________
>>CQ-Contest mailing list
>>CQ-Contest@contesting.com
>>http://lists.contesting.com/mailman/listinfo/cq-contest
>>
>
> _______________________________________________
> CQ-Contest mailing list
> CQ-Contest@contesting.com
> http://lists.contesting.com/mailman/listinfo/cq-contest
>
>
> --
> No virus found in this incoming message.
> Checked by AVG Free Edition.
> Version: 7.5.484 / Virus Database: 269.12.8/973 - Release Date: 8/25/2007
> 5:00 PM
>
>
_______________________________________________
CQ-Contest mailing list
CQ-Contest@contesting.com
http://lists.contesting.com/mailman/listinfo/cq-contest
|