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echo: ham_tech
to: JEFF EDMONSON
from: ROY WITT
date: 1997-09-27 14:26:00
subject: High Gain Antennas for 14

Hello Jeff.
27 Sep 97 06:06, Jeff Edmonson wrote to Roy Witt:
 >>  JE> Ever made a Quagi?  Two quad elements, one as the driven
 >>  JE> element, one as a reflector, the rest of the directors (9 of
 >>  JE> 'em) are Yagi elements.
 JE>
 >> I've stacked a pair of those on UHF.  Only had five
 >> directors, though.
 JE>
 JE> The one I saw (my dad built) had a total of maybe 10 elements on it?
 JE> 2 quad, and 6 yagi?  I can't remember... Damned CRS anyway 
If I remember, mine only had 4 directors instead of 5. Still had more than 
you dads' though.
 >> The plans I used were published in 73 magazine back in 1979. I
 >> remember it because I built them on a no-job budget, in my garage.
 >> The plans were for a VHF antenna, of which I scaled the dimenions for
 >> use on UHF.
 JE>
 JE> Sounds about the right time-frame.  It was included in the ARRL
 JE> Handbook in either '78 or '79... carried there for about 4 or 5 years,
 JE> and then dropped out, for whatever reason.
Probably got moved to the Antenna book.
 >> It was my idea to stack a pair of them and it worked out very well.
 >> Over the years the PVC tubing I used for booms deteriated and the guys
 >> I used to hold them up straight, frayed, but they were in the elements
 >> for 10 years and never wavered.
 JE>
 JE> What did you use for a phasing stub?
According to Wayne Overbeck, the inventor, you lose to much RF in a phasing 
stub.  He fed his direct with RG8 or 213.  Since I stacked mine, I used RG11 
as a stacking harness and fed that with RG8.  What surprised me was the SWR 
was flat on the first try...
 >> I ran across the loop dimensions the other day while looking for
 >> something else.  If I can find the spacing info and the rest of the
 >> plans, I'll post them..
 JE>
 JE> Hey, that'd be GREAT!
No problem, I just have to run through the file cabinet in my garage.  Dirty 
dusty place..
... MC&D & Chocolates: You never know what your gonna get.
---------------
* Origin: KB6PI's Antenna Farm * San Diego, CA (1:202/909.10)

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