I had an old an tired Gem Quad a few years back It was old and repaired many
times before I ever bought it.
I modified it to have 10,12,15,17,20,30 & 40m on a single feed. Worked well
on ALL bands with the single feed.
I also had 6m interlaced, but that band was on a separate feed as it was for
a separate radio.
The f/b & pattern was not so great on 40m as the thing was 1/2 sized and the
elements were just too close and the loading coils pretty big and scary
looking, hi hi! The SWR and patterns on all the other bands were all OK.
Took me a while to match everything.
What I did was put the driven together and tune each band separately, then
retune a little bit each time I added a band.
Once I had all the drivens set, I measured (as I recall) the wire for the
reflector and made it 5% larger. Put it all together, then up the tower it
went.
It was quiet as could be (QRN wise) and if it weren't for the horrible NB WX
(or the fact it was severly overloaded)
it'd still like to have it up today!
73- Mike
Michael, Coreen & Corey Smith
(VE9AA, VE9AAA & Baby-VE9)
271 Smith Rd
Waterville, NB
E2V 3V6
Canada
http://members.tripod.com/~ve9aa/index.html
http://www.geocities.com/RainForest/Vines/2174/
----- Original Message -----
From: Tim Makins, EI8IC <ei8ic@eircom.net>
To: TowerTalk <towertalk@contesting.com>
Sent: Saturday, September 01, 2001 11:13 AM
Subject: Re: [TowerTalk] Quad, Common feed
>
> Check out my friend's site http://www.qsl.net/ei7ba/ on the quad page - he
> knows what he is talking about...
>
> 73s Tim EI8IC
>
> ----- Original Message -----
> From: "Anthony Bowyer" <adb1x1@yahoo.com>
> To: <towertalk@contesting.com>
> Sent: 01 September 2001 15:00
> Subject: [TowerTalk] Quad, Common feed
>
>
> >
> > Of those of you who have a multiband (5 bands or
> > more) quad and use or have use a common feed, what
> > performance problems have you ran into? I plan to use
> > a separate feed for each band, but I was curious. I've
> > read the info at www.cebik.com, and as far as the
> > models go, it would have several detrimental effects.
> >
> >
> > Thanks!
>
>
>
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> -----
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>
>
List Sponsored by AN Wireless: AN Wireless handles Rohn tower systems,
Trylon Titan towers, coax, hardline and more. Also check out our self
supporting towers up to 96 feet for under $1500!! http://www.anwireless.com
-----
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