P3-switching between 2 K-3s

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P3-switching between 2 K-3s

Art Suberbielle
Hi all,


Trying to maximize the use of my one P3 by switching between 2 K-3s.  I use 2 separate switch boxes-one for the RS232 serial cable and one for the if cable. I use a Y connector onthe RS232 out from K-3. One side goes to the switch box, the other goes to computer for N1MM control.


All works fine EXCEPT I am unable to select Fixed Tune mode in the P3. It works fine using Tracking mode, but I prefer Fixed Tune mode.




Any suggestions?


73,


Art KZ5D
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Re: P3-switching between 2 K-3s

Alan Bloom-2
 > I use a Y connector on the RS232 out from K-3. One side goes to
 > the switch box, the other goes to computer for N1MM control.

I'm amazed that works at all, for two reasons.  One is, what do you do
with the RX line to the K3?  It can't just connect in parallel to the TX
lines from both the P3 and the computer because they would conflict with
each other.

Also, the computer should connect to the "PC" serial port of the P3, not
the "XCVR" port.

I've never tried using a single P3 with two K3s, but the way to hook up
the serial ports would be:

- PC RS-232 connects to P3's "PC" connector.
- Switch box's common port connects to P3's "XCVR" connector and the
other two ports to the two K3s.

You might have to cycle power on the K3 and/or P3 to get them to connect
properly when you switch K3s.

Alan N1AL


On 03/08/2014 06:55 AM, Art KZ5D wrote:

> Hi all,
>
>
> Trying to maximize the use of my one P3 by switching between 2 K-3s.  I use 2 separate switch boxes-one for the RS232 serial cable and one for the if cable. I use a Y connector onthe RS232 out from K-3. One side goes to the switch box, the other goes to computer for N1MM control.
>
>
> All works fine EXCEPT I am unable to select Fixed Tune mode in the P3. It works fine using Tracking mode, but I prefer Fixed Tune mode.
>
>
>
>
> Any suggestions?
>
>
> 73,
>
>
> Art KZ5D
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>
>
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html