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Topband: Wideband x-former...

To: <topband@contesting.com>
Subject: Topband: Wideband x-former...
From: "Lars Harlin" <lars.harlin@one.se>
Date: Mon, 30 Mar 2009 23:35:36 +0200
List-post: <topband@contesting.com">mailto:topband@contesting.com>
Hi TB'ers!

Anyone out there with experiences on wideband transformers wich can handle some 
power?
I've been trying to match 20 ohms to 50 ohms for a mobile whip, but no success 
so far...

I've tried different cores, iron powder and ferrites, separate windings and one 
tapped winding, but cant make it work. My hypothesis is that a 2:1 impedance 
conversion would do, so then the relation between the two windings should be 
the square root of 2 ie 1,414. What am I missing?

All suggestions welcome!

73 de Lars, SM3BDZ
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