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[TowerTalk] Bead baluns

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Subject: [TowerTalk] Bead baluns
From: Kenneth Hirschberg" < (Kenneth Hirschberg)
Date: Wed, 6 Feb 2002 17:42:22 -0700
Hi all -

To answer the question that you asked, regarding beads for RG-303/U:

For 40-10 you will have good results with 43 mat'l. (e.g. 50 beads of Amidon

For 80-10, 50 beads of 73 mat'l. (FB-73-2401) will do fine. (all the way
down to 160M actually)    40 beads of 73 mat'l. plus an additional 10 beads
of 43 mat'l. at the dipole end would do slightly better if you expect either
a significant mismatch, or are going to run high power on the higher
frequency bands.

Pay attention to weatherproofing the connections.  The beads themselves
don't care about moisture, but are frangible, and could use some protection
from mechanical threats, e.g. shrink tubing.

Ken,  K6HPX

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