[TowerTalk] checking balun phasing

[john at kk9a.com]

You should use identical baluns with phased beams. I am having trouble
understanding the issue since all of the baluns that I have used over the
last decades were clearly marked with either a red dot near one terminal or
they had different colored wires.

John KK9A


To:	towertalk at contesting.com
Subject:	Re: [TowerTalk] checking balun phasing
From:	Steve London <n2icarrl at gmail.com>
Reply-to:	n2ic at arrl.net
Date:	Fri, 17 Mar 2017 11:13:36 -0600
List-post:	<towertalk at contesting.com">mailto:towertalk at contesting.com>
If you have two identical baluns, you can match the phasing this way:

- Connect a signal generator to a tee-connector. Connect each side of the
tee to the input of each balun. - Connect the outputs of the two baluns in
series, leaving you with two wires - one connected to balun "A" and the
other to balun "B". - Connect the 2 wires to an oscilloscope or RF
voltmeter. Measure the voltage.
- Swap the wires on one of the baluns. Measure the voltage.

One of the voltage measurements will be much higher than the other. The
higher voltage will be when the two baluns are in phase with each other.

73,
Steve, N2IC