[Elecraft] Re: N6XI NAQP RTTY July, 2007 with K3

[wayne burdick]

Jeff,

The K3's I/O module already provides for the use of RTS or DTR for PTT 
and/or CW KEY in (two separate control lines). The exception is FSK, 
which is on the ACC connector. In the present incarnation, driving this 
line from a PC requires two external parts (one garden-variety NPN 
transistor and one resistor). I used MMTTY with this interface during 
NAQP this weekend.

But one nice thing about the K3 is its modularity. Both the main I/O 
card and its audio and digital daughter boards can be easily changed to 
meet future needs. If for example we added an FSK interface to the 
digital daughter board, you'd be able to upgrade it very inexpensively, 
and installing it would take about 2 minutes.

Also, we plan to design an external general-purpose I/O unit that would 
connect to the ACC jack. It would provide pre-wired connectors for use 
with various PC interfaces, transverters, the KRC2, etc.

73,
Wayne
N6KR


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