[Elecraft] K2/10 I Idiom Press CMOS4 Keyer Conflict

[Don Wilhelm]

David,

Do you have the plug from the CMOS4 wired correctly?
There are only 2 lines to connect.  The "hot" line should go to the tip 
and the ground line from the CMOS4 should connect to the shell. No 
connection to the ring on the plug.

Be certain that the ground from the CMOS4 is wired to he shell of the plug.
Either wiring the ground from the CMOS4 to the tip or wiring to the tip 
and ring (rather than the shell) will cause the behavior you have mentioned.

73,
Don W3FPR

On 2/25/2013 8:18 PM, David Dietrich wrote:
> Please reply direct, as I use digest mode and may not get the reply 
> until later.
>
> Hi All,
>
> I have a K2/10 and an Idiom Press CMOS4 keyer that I would like to use 
> together.  I have everything connected properly, the K2 set to "Hand" 
> for the input device, and the the cables I made are properly fashioned 
> and not shorted.  HOWEVER, when I go to send (on either side of my 
> paddles) the K2 goes into total key-down, and the only way to stop it 
> is to turn the rig off OR disconnect the CMOS4.  The CMOS4 doesn't 
> seem to be malfunctioning.  When I just have paddles connected to the 
> K2, and use the internal keyer, everything works fine.  Also, when I 
> have the K2 set to "Hand" and the paddles connected, everything works 
> fine.  I am not sure if the problem is with the CMOS4, K2, or both.  I 
> know the CMOS4 works properly since I have been using it since 2008 on 
> my ICOM with nary a problem.  Any ideas/input would be appreciated. 
>  If the problem is in the CMOS4, I'll E-mail Rob at Idiom Press, but I 
> figured that I would start here.
>