Thanks John – I’d agree with you – it isn’t going to give the correct, with
hairpin, driven element length unless I model it. If I used a transformer I
could match it... but would rather figure out how to do a hairpin.
and Jeff,
thanks – I’ll check it out. Hopefully it handles the ‘bracket’ as well since if
you see my next post you can see I’m having problems with it too.
Gary
The hairpin match is a feature provided in AutoEZ. If you are a hardcore EZNEC
user, check out AutoEZ. It’s a spreadsheet based optimization front end for
EZNEC that's written by Dan AC6LA. He's the guy who made ZPLOTS.
73/jeff/ac0c
www.ac0c.com
alpha-charlie-zero-charlie
-----Original Message----- From: john@kk9a.com
Sent: Friday, May 22, 2015 2:27 PM
To: towertalk@contesting.com
Subject: Re: [TowerTalk] how do you model a hairpin match?
I have no experience modeling a match. The modeling method described in
your last paragraph should give you the correct SWR curve however I do not
think that it will give you the exact driven element length when using a
hairpin. It would be correct if using a balun transformer. I think that
you will still have to shorten the element when you add a hairpin match to
the antenna.
John KK9A
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