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[TowerTalk] Baluns

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Subject: [TowerTalk] Baluns
From: (David J. Windisch)
Date: Mon, 9 Apr 2001 07:04:09 -0400
I want to replace a 50-200-ohm toroidal balun, which works fine 20M-10M
(actually, to above 2M), with a choke balun.

Wound  6T '213 on 4" PVC waterpipe.    Checked balance using r-f
m-voltmeter, MFJ analyzer, and combos of resistors totalling 50 ohms -- okay
so far.

Spread turns and wound another bi-filar separate coil.   Put inputs in
parallel, outputs in series, with 200-ohm load.   Range of 1-4-xformation
shifts down to 1.8-5 MHz.

Repeat with RG-303.   Ditto.

Is this 'expected behavior'?

73, Dave, K3BHJ

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