[Elecraft] P3-switching between 2 K-3s

[Alan Bloom]

 > 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
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