--- On Tue, 4/28/09, cruizzer77 <[email protected]> wrote:
From: cruizzer77 <[email protected]>
Subject: [Repeater-Builder] Re: W1GAN and square duplexers aka
homebrew duplexer
To: [email protected]
Date: Tuesday, April 28, 2009, 5:18 AM
It's interesting to hear about your projects! I would be interested
in knowing which VHF manual you're referring to, Jim.
At 08:32 AM 04/29/09, you wrote:
As I recall, an early ARRL VHF manual had a brief chapter on
repeaters, and I believe there were two articles that were of
interest. One was the duplexer and another was a four bay folded
dipole antenna for repeater use.
The duplexer article is on the antennas page at repeater-builder.com
"A Homemade Duplexer for 2-Meter Repeaters" by John Bilodeau, W1GAN
(from the July 1972 QST
magazine) <http://www.repeater-builder.com/antenna/w1gan-duplexer.pdf>
I'd like to get a scan of that ARRL antenna article for the antennas
page (repeater-builder has permission from the ARRL to post PDFs of
any articles in QST or their books).
If you know where the four vertical bay antenna article is located,
you may find the duplexer article also. I think it also was a QST article.
You may be thinking of the 73 Magazine article that is on the antennas page...
"440 MHz Folded Dipole Repeater Antenna" (222kb PDF file) This is
a two page PDF file of the classic 73 Magazine construction article
by Chuck Kelsey WB2EDV - Yes, you can build yourself a DB-224 folded
dipole array. <http://www.repeater-builder.com/antenna/440fdipl.pdf>
I remember one fellow who built the duplexer complained that when it
was hit by lightning, it disassembled itself. He had made the
outside tube out of individual sheets of copper soldered together,
and the solder joints let go when it took the strike.
That's what the PolyPhaser is for... mounted to the grounded copper
plate in the building wall...
73 - Jim W5ZIT
Mike WA6ILQ
