N6XI NAQP RTTY July, 2007 with K3

[Brendan Minish]

For making keying interfaces you can buy transistors with the pull up
resistors built in
My personal favorites come in SMT format and are small enough to easily
build into pretty much any connector
you can read more here
http://www.fairchildsemi.com/products/transistors/integrated_digital_transistors.html
these are seriously useful devices for all sorts of hackery.


My 'vote' is in favor of having general purpose I/O pins and doing the
interfacing externally.

73's  
brendan EI6IZ (waiting impatiently for my K3 :-)

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[dj7mgq]

Personally I would like to modulate and demodulate in the radio, with
the communication with the terminal (computer program) via RS-232 in
ASCII. Keying could be by a key line or by command codes via 232. Some
how, going from analog to digital to analog and back again to digital
strikes me as a bit silly.

A tuning display could still be via audio card and display software in
the computer.

As with everything, this has advantages and disadvantages - to each his own.

vy 73 de toby
--
DD5FZ, 4N6FZ (ex dj7mgq, dg5mgq, dd5fz)
K2 #885, K2/100 #3248
K3/100 #??? (< #200)
DOK C12, BCC, DL-QRP-AG
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