Ok - good point re QRO as I run an ALPHA 87A.
best regards
_________________________________
Paul Cassel
(519) 634-5139 home
(519) 749-7427 Blackberry
-----Original Message-----
From: NPAlex@aol.com
Date: Mon, 2 Jul 2007 11:52:17
To:paul@ve3sy.com, towertalk@contesting.com
Cc:wa3gin@comcast.net
Subject: Telrex Monoband matching
Paul,
I think you will find that the Coax BalUn cable length is 1/2 wL to get a
180deg phase shift and create the "balanced" feed.? When the voltage is "high"
on terminal 1, it is "LOW" on terminal 2 and visa versa.
?
The commercial balun should work, but could be inferior to the coax balun for
QRO power.?
?
Regards,
Norm W4QN
===========================================
In a message dated 7/2/2007 11:32:00 AM Eastern Daylight Time, paul@ve3sy.com
writes:
Now for the matching - the consensus for the T match is something in the 200
ohm range requiring a 4:1 balun which makes sense based on the type of 1/4
wave coax balun shown in the 10 and 15 metre manuals.?? I assume a
commercial ferrite 4:1 balun could be used in place of the 1/4 wave coaxial
originally specified?
Paul VE3SY
?
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