[Elecraft] KX3 does not signal KPA100 to deliver power

2024-05-19 Thread Karl W Hubbard via Elecraft
Yet another bug with the KX3 not activating the KPA100 to TX tonight. 
I have two complete sets of KX3-PX3-KPA100, one for regular use and the other 
stored away. 
Tonight I noticed I was unable to transmit on JS8Call after celebrating that 
finally, after swapping out the SignaLink sound card which will not work with 
the Realtek sound  card file now on Windows 11 (The SignaLink had worked when 
Microsoft was providing the Audio Codec files on the computer but somehow 
Microsft has now removed them during an update? )The Play!3 Sound Blaster SBX 
swap out fixed that problem. 
So I logged onto JS8Call tonight but this time I noticed that while I could 
receive, when I tried to transmit, the KPA100 power output meter would not 
light past the first square, and I received zero Heart Beat reponses, meaning I 
was not transmitting.  I swapped out my other Elecraft KX3 and it worked. So 
the problem is not the KPA100.  I notice now that on attempted TX during 
JS8Call, the TX red light on the KX3 was doing a high frequencey faint flicker, 
but stays on solid red when trying to transmit with the MH3, but still no power 
registers on the KPA100 meter with SSB.  My other KX3 did not display this  
flicker. 
I have looked through the manuals and have Fred Caddy's book which addresses 
the issue of no power out on the KPA100 on page 133 but none of these apply. Of 
course I have the ppt, PA in the "on," position.
Before I tear more of my hair out, is there anything obvious I am missing short 
of recalibrating or reinstalling firmware (I have no settings to really justify 
even making a back up)?
Karl , AF5LQ
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Re: [Elecraft] KX3 does not signal KPA100 to deliver power

2024-05-19 Thread Walter Underwood
> On May 19, 2024, at 12:52 AM, Karl W Hubbard via Elecraft 
>  wrote:
> 
> Before I tear more of my hair out, is there anything obvious I am missing 
> short of recalibrating or reinstalling firmware (I have no settings to really 
> justify even making a back up)?

The config includes the calibration data, so ALWAYS save the config.

Some normal steps before more detailed troubleshooting.

1. Check the power supply voltage while transmitting, the KX3 can display that.
2. Open up the KX3 and reseat the ribbon connectors.
3. Check that all external cables are really, fully seated.
4. After saving a config, EEINIT, then reload config.
5. Update the firmware.

wunder
K6WRU
Walter Underwood
CM87wj
http://observer.wunderwood.org/ (my blog)


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