I use a couple of RF limiting protection devices, each purchased on
eBay.com, with my RSP1a. One is Chinese and cost $20, and the other
is from Slovenia and cost $32 (I think). I have had excellent helpful
communication with the maker in Slovenia. From what I can tell, they
are each constructed with similar parts/circuits, and limits RF which
could damage the receiver. A local electronics guru / Elmer who used
to design radio equipment for NASA and the Air Force reviewed them and
considers them appropriate to the task. I use one of these RF limiters
whether I connect the RSP1a receiver directly to the rig or to a
separate antenna outside.
Other ops use similar RF limiting devices from Array Solutions and
DX-Engineering, which I am confident are also appropriate to the task at
around double the cost of mine. Just another way to skin the same cat.
Just my take. K8JHR
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