K3 Goes to TX on Turn ON

[Elecraft mailing list]

Have a problem that just cropped up last night. When I turn on my K3, the red TX light immediately goes on. After connecting and disconnecting all external connections to K3, I determined the culprit was the RS-232 cable to the P3. If I disconnect the cable problem goes away, red TX light goes out. I tried swapping  RS-232 cables but same problem exists. Any ideas where to look on this ?? The P3 and K3 have been co-existing fine til last night.

Tnx & 73 Paul
kc2nyu
______________________________________________________________
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
Message delivered to [hidden email]

[Don Wilhelm-4]

Paul,

Have you disconnected the RS-232 cable to the PC from the P3?  If not,
try that and then connect the RS-232 cable between the P3 and K3.  If
the problem is resolved with only that cable in place, blame your
computer, but if the problem happens with no computer connection to the
P3, contact P3support.

73,
Don W3FPR

On 10/24/2014 10:59 AM, paul ecker via Elecraft wrote:
> Have a problem that just cropped up last night. When I turn on my K3, the red TX light immediately goes on. After connecting and disconnecting all external connections to K3, I determined the culprit was the RS-232 cable to the P3. If I disconnect the cable problem goes away, red TX light goes out. I tried swapping  RS-232 cables but same problem exists. Any ideas where to look on this ?? The P3 and K3 have been co-existing fine til last night.
>
>

______________________________________________________________
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
Message delivered to [hidden email]

[Alan Bloom]

Paul,

If the K3's "PTT-KEY" menu selection is set to something other than
"OFF-OFF" then the K3 uses the RS-232's RTS or DTR pins as a keying input.

The P3 has no internal connection to those pins.  It just passes them
straight through between the "PC" and the "XCVR" connectors.

Do you have an RS-232 cable connected between the P3 and a PC?  If so,
then no doubt the PC is asserting RTS or DTR.  Either that, or the cable
is bad.

Three possible solutions:

- Figure out why the PC is asserting RTS or DTR and change it.
- Change the K3 "PTT-KEY" menu entry to "OFF-OFF".
- Remove the RS-232 cable between the P3 and the PC.

Alan N1AL


On 10/24/2014 07:59 AM, paul ecker via Elecraft wrote:

> Have a problem that just cropped up last night. When I turn on my K3, the red TX light immediately goes on. After connecting and disconnecting all external connections to K3, I determined the culprit was the RS-232 cable to the P3. If I disconnect the cable problem goes away, red TX light goes out. I tried swapping  RS-232 cables but same problem exists. Any ideas where to look on this ?? The P3 and K3 have been co-existing fine til last night.
>
> Tnx & 73 Paul
> kc2nyu
> ______________________________________________________________
> 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
> Message delivered to [hidden email]
>
>

______________________________________________________________
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
Message delivered to [hidden email]