[TowerTalk] how do you model a hairpin match?

[StellarCAT]

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 at kk9a.com 
Sent: Friday, May 22, 2015 2:27 PM
To: towertalk at 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