[Elecraft] N4PY K2 Software

Thu Feb 19 17:57:01 2004

My N4PY Software keys the K2 by sending characters to the K2 over the serial
port.  I do not raise any line in the serial cable for keying.  I send
serial port commands to the radio and let the firmware K2 firmware key the
radio.  This would not be a disaster for contesting as you would likely use
the logging program and not my control program to key the radio.  My program
will only key the radio if you tell it to.

Carl Moreschi N4PY
Franklinton, NC
----- Original Message -----
From: "James T. "Jim" Rogers" <[email protected]>
To: "Elecraft Reflector" <[email protected]>
Sent: Thursday, February 19, 2004 10:14 PM
Subject: Re: [Elecraft] N4PY K2 Software

> Blake wrote:
> DOT/PTT on the K2 battling with LPT PTT creates a 2radio switchbox a
> DISASTER.  I've developed work arounds for that inconvenience, but 2radio
> SSB is a different story.  With miles of cables running to and fro on my
> desk, yes, swapping cables when swapping modes is a pain....
>
> I know I'm not the only one who thinks the PTT/DOT sharing is wacky.  I
> really can't see one situation where it would be beneficial.
>
> Blake, how about a good old simple OR function, two diodes (the
> microcontroller appears to be providing pull up to vcc) , one diode
> (cathode) to the paddle dot side, one diode (cathode) to your mic ptt
and/or
> footswitch, both anodes to DOT/PTT. When you are on cw, paddles work as
> normal. When you are on ssb, ptt works. No cable swithcing.
>
> DISCLAIMER: This is just conjecture on my part, I have not tried it and
the
> voltage drop across the diodes might be enough to keep the MCU from
> recognizing a closure. I would suggest you look into the spec sheets on
the
> MCU and make sure you understand the inner workings of the MCU ports
before
> attempting this and/or pose the question to Gary at support.
>
> 73 Jim, W4ATK
> K2 #4028
>
>
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