[Elecraft] Interface for MRP 40

[Brendan Minish]

The requisite keying interfacing for DTR and RTS is ALREADY built into
the K3 
you just need to enable it on the K3 
No need for any interface, just an RS232 cable 

On Tue, 2011-05-24 at 10:00 -0400, nr4c wrote:
> 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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-- 
73
Brendan EI6IZ