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Topband: Protecting an Array Solutions K9AY Loop from Transmitted RF

To: topband reflector <Topband@contesting.com>
Subject: Topband: Protecting an Array Solutions K9AY Loop from Transmitted RF
From: N4ZR <n4zr@comcast.net>
Date: Thu, 10 Oct 2019 21:30:31 -0400
List-post: <mailto:topband@contesting.com>
I'm in the process of building up a K9AY loop, using the Array Solutions boxes, and it occurred to me that I probably need to work out some way to protect the preamp in the shack-end box from transmitted RF, particularly since the K9AY loop is only about 60 feet from the vertical leg of my inverted L and I'll be running 1500 watts.

I can see maybe cutting off the DC to the preamp, but figure that won't be enough. Alternatively, I can probably work out a way to either open or short the feedline coming into the indoor box where the preamp is.  Any advice as to which would be best (opening or shorting)?  I only have one spare transistor.

Advice much appreciated

--

73, Pete N4ZR
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