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Re: [TowerTalk] Point me the way....

To: Clive GM3POI <gm3poi@btinternet.com>
Subject: Re: [TowerTalk] Point me the way....
From: Don Havlicek <n8de@thepoint.net>
Reply-to: n8de@thepoint.net
Date: Fri, 19 Dec 2003 11:03:04 -0500
List-post: <mailto:towertalk@contesting.com>
Or use 75 ohm coax and parallel two of them for a much closer match!
Don
N8DE

Clive GM3POI wrote:
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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_______________________________________________

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



_______________________________________________

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

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