Date: Thu, 17 Aug 2017 08:48:58 +0000 (UTC)
From: Dan Maguire <djm2150@yahoo.com>
To: <towertalk@contesting.com>
Subject: [TowerTalk] DXE Yagi Mechanical
<The next update to AutoEZ will have the ability to both read and write Yagi
Mechanical (YM) format files. So if you start a design in YM you can easily
import the taper schedules into AutoEZ and assign variables for things like
element tip coordinates and <boom positions. You can then use the AutoEZ
optimizer to tweak the electrical properties (gain, pattern shape, SWR, etc) to
your satisfaction. When done you can then export back to YM format (*.stm file
extension) and all the non-electrical properties
<(like tubing wall thicknesses, overlap amounts, yield stress, and density)
will be preserved so you can pick up where you left off in the mechanical
design.
<On the other hand, if you start out in AutoEZ you can create a YM file and
AutoEZ will assign typical default non-electrical properties for each taper
section when building the *.stm file. In either case you can iterate back and
forth between the two programs <until you are happy with both the electrical
and mechanical aspect of the model.
<At the moment I'm still debugging this new feature and I'm looking for *.stm
files for use as test cases. If you are a user of both AutoEZ and Yagi
Mechanical and you have any very complex *.stm files you'd be willing to share
please contact me off-list. The <more complex the *.stm file the better and
any files you share will be kept strictly confidential.
<The next AutoEZ update will also be able to import Yagi Optimizer (YO) files
but I already have hundreds of those that I've gathered from around the Web.
<Thanks.
<Dan, AC6LA
<http://ac6la.com/
## I dont use AutoEZ but I do use YM all the time these days. The question I
have is.... the Resonant freq that YM spits out for each ele, is it close to
what AutoEZ spits out ? If not, is the YM resonant freq a bit high..or
low..and typ by how much ?
Lately what I have been doing is to 1st design the REF in YM.... such that it
is strong enough for the job, etc. Then only the tips are tweaked between say
a REF, DE, DIRS. What I end up with is a REF that does the job, meets my
specs, then the shorter DE, + DIRS end up even stronger, due to their shorter
lengths. That process simplifies things a bit from a mech point, and also
buying tubing etc. But things can end up slightly askew if the aprx freq
entered into YM is outa whack, and or the resonant freq that YM spits out
doesnt jive with reality. It would save a lot of time in some cases.
Tnx.... Jim VE7RF
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|