Even better still, I use parallel quarter wave transformers to match
12.5ohms to 50 ohms.
So the only addition to the system is another length (about 90ft @ 1.8mhz)
to put in parallel with the last 90ft of your 50 ohm feeder. No UNUNs,No
networks to go wrong. Just a reliable 25 ohm quarter wave transformer. 73
Clive GM3POI
----- Original Message -----
From: "Jan Erik Holm" <sm2ekm@telia.com>
To: <towertalk@contesting.com>
Sent: Friday, December 19, 2003 3:10 PM
Subject: Re: [TowerTalk] Point me the way....
Instead use a stub. I´m sure you have some scrap
RG213 around, a T-connector and some PL259´s,
wouldn´t take more then an hour to fix.
Or make the antenna slightly reactive (longer),
put a variable capacitor in serie at feed point
ant tune up.
73 gl Jim SM2EKM
PS: How to design a stub match can be found in
the ARRL handbook, works great, can handle lots
and lots of power, doesn´t cost much money,
for QROO use DIN 7/16 connectors and 7/8"
hardline.
-----------------------------------------------
Lee Buller wrote:
Gentlemen and Ladies....
Could someone point me to an article about UNUNs? Web Page?
I have an Inverted-L that seems to need one.
Lee -K0WA
_______________________________________________
_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless
Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any
questions and ask for Sherman, W2FLA.
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TowerTalk mailing list
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http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions and ask for Sherman, W2FLA.
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk