Topband: Protecting an Array Solutions K9AY Loop from Transmitted RF

[N4ZR]

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 at comcast.net>
>> Sent: Oct 10, 2019 9:30 PM
>> To: topband reflector <Topband at 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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