K2/PSK KIO2?

[Jim AB3CV]

Is it worth it to put in a KIO2 just for PSK? Or is a comport interface to
the PTT adequate?

I'm trying to avoid multiple disassemblies of the K2 so I'd like to put
everthing in at once.

tnx

jim ab3cv

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[Leigh L. Klotz Jr WA5ZNU]

It is adequate, but you can get frequency data and control for your
spectrum display, so you see the frequency you're on, click on a signal
and have it recenter in the filter passband, and change
bands/frequencies from your program.  The "rig control" feature is
supported by a number of digimode programs.  If you use the KIO2, you
won't need to use the PTT line with such programs, as they can send the
K2's TX and RX commands over the serial port, so you only need the one
serial port, not two.
73,
Leigh/WA5ZNU
On Tue, 22 Jan 2008 7:45 am, jim ab3cv wrote:
> Is it worth it to put in a KIO2 just for PSK? Or is a comport interface
> to the PTT adequate?
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[Don Wilhelm-4]

Jim,

The KIO2 is not required (nor will it help) for any of the soundcard
derived AFSK data modes.  If the application supports PTT operation by
activating one of the RS-232 signals on a serial port (usually RTS or
DTR), you can build a 2 diode, 1 transistor, 1 or 2 resistor interface
that activates the transceiver PTT input.  Check out some of the methods
of interfacing PSK31 that can be found on the internet (Google 'PSK31')
and you will see several methods of keying the rig's PTT input.

PSK31 and its variants do not use the RS-232 data signals at all.

73,
Don W3FPR

Jim Miller wrote:
> Is it worth it to put in a KIO2 just for PSK? Or is a comport interface to
> the PTT adequate?
>
> I'm trying to avoid multiple disassemblies of the K2 so I'd like to put
> everthing in at once.
>
>  
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[Jim AB3CV]

thanks to all for the psk info.

the nbems activity has sparked my interest in psk31.

73

jim ab3cv
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[Julian, G4ILO]

Leigh L Klotz, Jr. wrote

If you use the KIO2, you
won't need to use the PTT line with such programs, as they can send the
K2's TX and RX commands over the serial port, so you only need the one
serial port, not two.

I have only ever used one serial port and have used a PTT and CAT control using the same port. With MixW I use the CAT command for TX/RX keying and the DTR line for Morse keying. But because the key jack doubles as PTT on the K2, DTR works for conventional PTT as well for software that doesn't support CAT keying.

But to return to the original question, the KIO2 is certainly not essential for PSK use.