Oh yeah, I forgot. In the end my solution was to just use the DB420 as
it is. It's worked ok. This spring we're replacing it with a Telewave
ANT450D6-9. Yeah, a lot less antenna than the DB420, but it is
designed to cover the amateur band, so we'll give it a go.
On Mar 22, 2009, at 10:26 PM, Jim Brown wrote:
We made one back in the '70s from 3/4 inch aluminum angle. We sawed
a vee at each bend point and welded the bent angle back together and
made a very stable element. The dimensions we used were from an old
VHF handbook and the elements were spaced quite a bit farther from
the mast than a DB-224. Our matching harness never did work out
right for that antenna and it was never put in service, but
mechanically it seemed to be pretty sturdy.
73 - Jim W5ZIT
--- On Sun, 3/22/09, Kris Kirby <k...@catonic.us> wrote:
From: Kris Kirby <k...@catonic.us>
Subject: Re: [Repeater-Builder] Re: Decibel dipole array sweeps
To: Repeater-Builder@yahoogroups.com
Date: Sunday, March 22, 2009, 6:01 PM
On Sun, 22 Mar 2009, rahwayflynn wrote:
> I have access to 316 stainless tube & am willing to take a shot at
> fabricating replacement elements.
Sounds like fun. I think the DB antennas are made from aluminum,
however.
If you're going to be making a DB antenna clone, it makes more sense
to
either punch them out of plate or cut them from rod. Any mechanical
engineers on the list? :-)
--
Kris Kirby, KE4AHR
Disinformation Analyst
--
Cort Buffington
H: +1-785-838-3034
M: +1-785-865-7206
