[Elecraft] DATA Jack for K2??

[Don Wilhelm]

There *was* a board available to provide higher level fixed audio out of 
the K2 - look at the K2 Specific Files on Tom Hammond's website 
www.n0ss.net - you are looking for the W3FPR Fixed Audio Output 
information.  Tom no longer has boards, but will send you the board 
image to allow you to make your own.  Complete documentation is 
available to download.

With the fixed audio board in place, the rest is easy, but is easiest to 
do with a switch outside the K2 - to disconnect the microphone to the 
data input and route the PTT from whatever switching arrangement you use 
for data modes to the mic connector.  If you also route the Fixed Audio 
output to an unused microphone pin, all signals are available at the 
microphone jack.  For one example of this implementation see the 
Switchbox for K2 data modes on my website www.w3fpr.com (yes, I probably 
should update that article - will do when I have the time!) - the 
principles are there in the article and it includes isolated data 
input/output, so it serves as the complete data mode interface.

73,
Don W3FPR

Julian, G4ILO wrote:
> If you have the AF filter board installed then there is a take-off 
> point on
> it that can be used to bring fixed level audio to a socket on the rear
> panel.
>
> Transmit is not such an easy solution. Since you need to attenuate the
> signal from the computer I suspect you could feed it in parallel with the
> mic input and connect to a 3.5mm jack socket or other connector dangling off
> the back of the mic plug. Since I rarely use phone I never bothered to do
> that as it wasn't much trouble to swap the mic plugs over.
>
>   
>