Array Solutions no longer handles the K9AY components, which actually
came from K9RU's Wolf RF Systems. It looks like the ICE limiter is
still out there, and reasonably priced, but I have no idea whether it's
a good design - it's pretty old - or just a pair of diodes back to back.
73, Pete N4ZR
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On 10/10/2019 10:08 PM, Alan Swinger wrote:
I use a Model 197 RF Limiter/Arrestor by Industrial Comms Engineers for my K9AY
Loop. I think I got it from DX Eng ~ 10 yrs ago, but also chk w/ Array
Solutions since I think they now handle the K9AY Loop. - Alan K9MBQ
-----Original Message-----
From: N4ZR <n4zr@comcast.net>
Sent: Oct 10, 2019 9:30 PM
To: topband reflector <Topband@contesting.com>
Subject: Topband: Protecting an Array Solutions K9AY Loop from Transmitted RF
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
Check out the Reverse Beacon Network
at <http://reversebeacon.net>, now
spotting RTTY activity worldwide.
For spots, please use your favorite
"retail" DX cluster.
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