P3 question

[Garry Shapiro]

I have had a P3 for some time but only very recently did I build it and
install it, and only now am I trying to learn it.

The first problem encountered is as follows. I tried QSYing the K3 to a marker
frequency, but no QSY occurs when either marker is selected and the
Select knob is tapped. Yes, there is an RS232 connection between the K3
and P3. The RS232 line also connects in parallel to a MicroHam router,
and a SteppIR SDA100 controller through Y splitter cables. So I asked
myself  "Are these additional breakouts preventing QSY to the marker
frequency?" To answer, I disconnected the MicroHam and SteppIR
controller, with no difference.

Am I missing something here? Is there an enabling configuration
selection in the K3?

Garry, NI6T

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[Joe Subich, W4TV-4]

 > The RS232 line also connects in parallel to a MicroHam router,
 > and a SteppIR SDA100 controller through Y splitter cables.

microHAM interfaces should *never* be connected to K3/P3 through
a Y cable.  The proper connection is the DB9 (marked "CAT")
lead of the microHAM cable set should connect to the P3 "PC"
jack and the P3 "XCVR" jack should be connected to the K3 RS-232
jack using the Elecraft supplied cable.

As with any other RS-232 device, the microHAM <-> P3 connection
can not withstand the load of a second receiver or inactive
transmitter.  Connecting two TxD sources to any RS-232 device
will result in improper operation (no data).

73,

    ... Joe, W4TV


On 10/3/2013 9:23 PM, Garry Shapiro wrote:

> I have had a P3 for some time but only very recently did I build it and
> install it, and only now am I trying to learn it.
>
> The first problem encountered is as follows. I tried QSYing the K3 to a
> marker
> frequency, but no QSY occurs when either marker is selected and the
> Select knob is tapped. Yes, there is an RS232 connection between the K3
> and P3. The RS232 line also connects in parallel to a MicroHam router,
> and a SteppIR SDA100 controller through Y splitter cables. So I asked
> myself  "Are these additional breakouts preventing QSY to the marker
> frequency?" To answer, I disconnected the MicroHam and SteppIR
> controller, with no difference.
>
> Am I missing something here? Is there an enabling configuration
> selection in the K3?
>
> Garry, NI6T
>
> ______________________________________________________________
> 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]

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

[Mike K2MK]

Hi Gary,

The quickest way to determine if the P3 is talking to the K3 is to look at the top of the P3 display. If the current K3 frequency is not displayed in the center of the screen then you have not established communications.

73,
Mike K2MK

Garry Shapiro wrote

I have had a P3 for some time but only very recently did I build it and
install it, and only now am I trying to learn it.

The first problem encountered is as follows. I tried QSYing the K3 to a marker
frequency, but no QSY occurs when either marker is selected and the
Select knob is tapped. Yes, there is an RS232 connection between the K3
and P3. The RS232 line also connects in parallel to a MicroHam router,
and a SteppIR SDA100 controller through Y splitter cables. So I asked
myself  "Are these additional breakouts preventing QSY to the marker
frequency?" To answer, I disconnected the MicroHam and SteppIR
controller, with no difference.

Am I missing something here? Is there an enabling configuration
selection in the K3?

Garry, NI6T