Gary,
A stereo to mono adapter will usually not work. If you follow the
diagram for most of those adapters, the result will be the same as using
a mono plug - the ring will still be connected to the sleeve of the mono
plug.
The only real answer is to change the mono plug of your ICOM SP 20 to a
stereo plug with only the tip and the sleeve connected (No connection to
the ring).
73,
Don W3FPR
On 12/21/2013 8:49 PM, Gary NL7Y wrote:
I have a Radio Shack P/N 274-0374 1/8" Mono Jack to 1/8 Stereo Plug Adapter
stuck in the back of my K3. It feeds the mono plug to my ICOM SP 20.
No smoke so far, but I've wondered if the mono input side of the adapter
still shorts the stereo output. Suppose I should test it and find out. I
read somewhere that there was an internal K3 upgrade to potentially reduce
the problem.
If it's an issue, maybe Elecraft should offer a preferred adapter? Of course
I can always just solder up a stereo plug with the mono wiring.
73, Gary NL7Y
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