[Elecraft] Interface for MRP 40

[nr4c]

To decode the CW signals, (no transmit) all you need do is use a patch 
cord (1/8 inch stereo both ends) from the LINE OUT on bacxk of the K3 
and connect to LINE IN or MIC IN on the computer sound card.

For TX, see the uper partr of the schematic shown here:  
http://www.polar-electric.com/Morse/MRP40-EN/IF.gif, the part with the 
opto-couplers.  A patch cord from computer OUT to K3 LINE IN Will get 
you the audio.  The K3 already has transformer isolated in/out on the 
LINE interface.

....bc   nr4c


On Tue, 24 May 2011 09:34:11 +0100, Gavin Keegan wrote:
> I would like to use the MRP40 CW program with my K3 (1336) connected 
> to
> my laptop and need details of a suitable interface unit, preferably
> homebrew.  Can anyone help with either a design or details of a
> proprietarily made unit please?  Gavin Keegan - G6DGK
>
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