[Elecraft] Plug wiring for Model CMOS-4 Keyer

[geoff allsup]

Hi Gary

Even easier  - I use a regular RCA patch cable (came with my keyer 
anyway) and a Radio Shack RCA to 1/8" stereo adapter (don't have RS #) 
with my CMOS-4.  The adapter takes RCA center conductor to both tip and 
ring.  Works with my KX1 and FT-897.    Handy, and, with no cutting and 
soldering to one of those nasty 1/8" stereo plugs which always seem to 
be chrome-plated and tough to solder, probably more reliable too!

73,
geoff - W1OH


Rob Locher W7GH wrote:
> Hi Gary,
> 
> Sorry for the delayed response to your question.  I was away from email  
> for a long weekend (hooray!).  I don't have a KX1, so I don't know  
> exactly, but I do have a CMOS-4 (and an Elecraft K2).  The CMOS-4 uses 
> an  RCA jack for the key output.  To interface my K2 to my CMOS-4 keyer, 
> I  took an RCA patch cable, cut off the RCA connector on the end, and  
> soldered a 1/8" stereo plug instead.  Of course the cable ground shield  
> should be connected to the RCA ground shield on one end and the stereo  
> ground shield on the other.  I can't recall if the inner connector from  
> the RCA plug should be connected to the tip or the ring of the stereo  
> plug, but I suspect it doesn't matter.
> 
> 73,
> - Rob W7GH
> K2 #5004
> 
> 
> 
> On Sat, 25 Mar 2006 14:03:27 -0800, Gary H Evans  
> <gevans2650 at sbcglobal.net> wrote:
> 
>> I would like to use my CMOS-4 keyer with my KX1. Can anyone help with  
>> the wiring of the cable between the keyer and the KX1? Thanks...Gary 
>> -  AA6R
> 
> 
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-- 
*************************************************************
Geoff Allsup, W1OH     gallsup at whoi.edu  or  w1oh at whoi.edu
Research Engineer              Upper Ocean Processes Group
Woods Hole Oceanographic Institution   Woods Hole, MA, USA
*************************************************************