[SCCC] Phased verticals

Bob Grubic bobgrubic at gmail.com
Mon Aug 12 21:24:51 EDT 2019


I am considering using two 20-meter phased verticals for some portable
operations. (Later, two 40-meter verticals.)

Keeping it simple at first, I'd run coax from my rig to a T-connector and
then through identical, same length pieces of coax to each vertical
(driving them in phase). I've seen this scenario several times online, but
the fact that two 50-ohm antennas would be in parallel at the T-connector
to give you a 25-ohm load (in effect), somehow bothers me.

I've seen an article online suggesting using an UNUN to match the rig's
coax to the two legs feeding the antennas--essentially replacing the
T-connector (with a UN-22-25 from CWS). http://www.cwsbytemark.com/  I
can't find any other discussion of this particular subject online.

Has anyone had any experience with this or thoughts on the subject? I'd
appreciate hearing about it.

Thanks very much.

73,
Bob NC6Q


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