Have you tested it yet?  All the ones I tried had the sleeve connected 
to one of the RCA plug center pin and only one of the rings connected.

73, tom n4zpt

On 5/23/2012 10:48 PM, ~BG~ wrote:
> I've purchased various TRRS plugs from Markertek in the past.  As far as I
> can tell, they've had the widest variety (had to replace the plug for my
> Etymotics IEMs, and they had the only one that was small enough and looked
> comparable to the one my IEMs came with)
>
> http://audio-video-supply.markertek.com/search?w=TRRS&IMAGE.x=0&IMAGE.y=0&IMAGE=search
>
>
> ./ben
> W6MCM
>
> On Wed, May 23, 2012 at 2:49 PM, Lance Collister, W7GJ<w...@q.com>  wrote:
>
>> I ordered my KX3 plugs from DigiKey and the were here VERY fast!  I am
>> waiting for
>> the arrival of my KX3 before I actually make the cables, though.  I will
>> have to
>> experiment a bit to see what I need to do to run digital modes with the
>> KX3...I am
>> hoping I might be able to get by just attenuating the LINE OUT from the
>> computer but
>> I don't know if that will give me enough isolation to the KX3 MIC IN or
>> not.  I am
>> very spoiled by the built-in interface of my K3.
>>
>> GL and VY 73, Lance
>>
>> On 5/23/2012 8:04 PM, Robbins, James wrote:
>>>        Has anyone located a source for a quality 3.5mm 4 conductor (TRRS)
>>> plug which
>>> will work in the Mic/PTT jack of the KX3?  I located one by Calrad,
>>> but it appears not to
>>> be very sturdy despite being made of metal (the plug part came apart
>>> from the
>>> head-appearing to be pressure fit only). Thanks. 73, Jim Robbins, N1JR
>>
>>
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