The excellent web site for calculating matching network values should have
been:
http://home.sandiego.edu/~ekim/e194rfs01/jwmatcher/matcher2.html
not the one I posted yesterday.
73,
Tom G3OLB
_
Topband Reflector
AutoEZ is an Excel application that lets you automate the use of EZNEC.
Version 2 is now available. Major changes are 1) an optimizer, 2) new Create
dialog windows to easily build common antenna configurations, and 3) faster
calculation speeds.
The AutoEZ home page with revised documentation
Very nice to have all of those collected into one place!
Thanks for sharing, Tom! Have a god day!
73,
Charlie, K4OTV
-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Tom
Boucher
Sent: Friday, September 20, 2013 2:25 AM
To: 160 reflector
Subject:
Hi friends,
I finished sending the measurements data to all that requested
it. In case somebody didn´t receive it yet, please let me know.
Even though I did not mention it before, I also have Field Strength measurement
synchronized in time with the AIM measurements.
As surely
Thanks for sharing, Dan! I've used EZNEC a LOT over the years, and I've done
a lot of useful work with it, but I was unaware of AutoEZ. I'll look into it
and maybe investigate the paid version as well.
Thanks, and have a good day!
73,
Charlie, K4OTV
-Original Message-
From: Topband
Just measured the 'hairpin' coil for my 160m 38 foot top loaded - coil
and 2 x 18 foot wires - antenna.
Feedpoint impedance without match is 12 ohms.
Placing shunt coil to ground of 1.7microH and tx sees 50 ohm 1:1.
Only problem with the vertical being so short the bandwidth is only 12
khz
Hi, Eddie
Nicely done! Looks reasonably professional to me! At the very least,
you've made a good effort to quantify your results in a meaningful and
repeatable way, with decent tools. No need to tune your sense antennas, as
long as there is enough signal level and dynamic range for your FS
Hello Jim,
Thank you for this. I don't doubt for a second that my elevated 1/4 wave
radial currents may be unequal. I should throw together an RF current meter
and check them sometime, and add more radials while I'm at it. After the
ticks and chiggers here die, though. :-)
I don't have any
look me up on qrz I need help trying to get on 160 meters.
_
Topband Reflector
Thanks, Doug.
On Fri, Sep 20, 2013 at 10:53 AM, Doug Scribner
dscrib...@myfairpoint.netwrote:
Mike,
My emails to the reflector keep getting bounced back. Post this if you'd
like...
Here's a fairly extensive study by Rudy, N6LF...
In the article (38 pages), he acknowledges K5IU for his
Hello Greg,
We see the photo there. How big is your lot?
If there's any way to get coax from your house into those big woods to the
east or west, you might have it made. You could use the trees as antenna
supports for an inverted-L and Beverages.
73, Mike
www.w0btu.com
On Fri, Sep 20, 2013 at
Hi, Mike
You've reminded me that I have pair of 2 amp FS RF ammeters (1950s/1960s
era) that I need to hunt up and squirrel away before clearing out the junk
around my home and preparing to move out. Someday, I may be able to put up
another 160 antenna!
73,
Charlie, K4OTV
-Original
I've had the privilege to beta test the latest version of AutoEZ with the
optimizer. It's really a neat piece of software for antenna modeling.
73, Rudy N6LF
_
Topband Reflector
Yes, EZNEC does work!! I've had great success with it over the years. It
was great for my home-brew (home-EZNEC-designed) single-feedline 5-band
quad. It was great when I was building and tuning it to watch all the
resonances and impedances fall in line just where EZNEC predicted! (Killer
Great empirical info, Eddie.
Can you say something qualitative about your ground conditions ? For
example, irrigated soil, rocky hilltop, sand, etc.
You are doing something right - Huge signal on topband, and you also
hear very well.
73,
Steve, N2IC
On 09/20/2013 06:31 AM, Eduardo Araujo
On 9/20/2013 1:14 PM, Rick Kiessig wrote:
Although I like and use (and have paid for) EZNEC, I've been using the free
4nec2 app for optimization -- perhaps that's another option for those
without Excel.
73, Rick ZL2HAM
I recently looked at 4nec2. Correct me if I am
missing something, but
Richard,
4NEC2 does current sources. It also supports NEC4 and has good graphics.
What other deficiencies are you missing?
Years ago, I tried both EZ and 4NEC2. I stayed with 4NEC2.
Jim, KR9U
-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of
Greg, I live near CRW, about 69 miles from you as the crow flies.
If you need help getting on Topband, send an email to me with your phone number
and I will call you.
73 Charlie N8RR
weeks...@suddenlink.net
Date: Fri, 20 Sep 2013 12:05:34 -0500
From: mikew...@gmail.com
To:
Slightly off topic:
The stumbling block with AutoEZ is that you have to
have a copy of Microsoft Excel, and it has to be
exactly that, not a clone like Open Office or Libre.
I am currently using my office computer at work
for AutoEZ because the IT dept installed Microsoft
Office on it without
I modeled my Marconi T antenna using EZNEC, got complex impedance parameters
at feedpoint, plugged these into the L-network calculator that Tom mentions to
find an L-network design, made an air-wound coil and found a suitable old air
variable, and had 100% success getting a match exactly where
Greg, correction on the email address to use. Use weeks...@hotmail.com
From: weeks...@hotmail.com
To: topband@contesting.com; kd8...@suddenlink.net
Date: Fri, 20 Sep 2013 13:06:48 -0500
Subject: Re: Topband: location
Greg, I live near CRW, about 69 miles from you as the crow flies.
A few days ago I finally got around to resurrecting my screwdriver
antenna that had met its demise many months back when a 7-year-old
stainless steel mounting bolt suffered metal fatigue.. I was 5 miles
down the road before a passing motorist brought it to my attention, and
there was serious
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