[Elecraft] K3 - no output power

[Ray]

Harald
I think you need to start at Ground Zero,,,,,,
Go to your Elecraft Utility
And connect to the K3 Radio and verify
The Firmware is present (05.67 ect)
I would go to the Basic mode of operations.
Set K3 to SSB operation Upper or  Lower , Freq middle of band. 
Set radio to PTT (not VOX) Ant 1, load to Ant 1.
Verify on K3 DVM , voltage is 13 volts.
Push Tune button (long for TX – with RF)
Adjust PWR knob Clockwise for Max RF power.
Take readings………. Ray WA6VAB  K3  

From: Christian Janssen DL1MGB
Sent: Wednesday, March 24, 2021 1:49 PM
To: Harald Fritzsche (DD0VS); elecraft at mailman.qth.net
Subject: Re: [Elecraft] K3 - no output power

Hi Harald,

spectrum analyzer and more space on the table would be the best, but both not available :-)

Additional information:
- internal voltage / current (DISP)
  
Standby: 13.8 V / 0.86 A
Tune: 13.4 V / 3.20 A

And still no power output on the external wattmeter.

It seems that there is something produced, but it doesn't exit the K3.

I also did an EE INIT, ut no change.

73s Chris



Am 24.03.2021 um 21:32 schrieb Harald Fritzsche (DD0VS):
> Hello Chris,
> 
>  
> 
> strange is, that your Display does not show a frequency, but it should.
> 
>  
> 
> I had a water Intrusion in 2019 which causes several defects.
> 
> I was testing along the Signal path to see the Signal (with RSP-spectrum analyzer), that helped me, to find the defects. It tooks a while also with help of the list here.
> 
>  
> 
> Receiving is working?
> 
>  
> 
> Vy73 & GL
> 
> Harald
> 
> DD0VS
> 
>  
> 
>  
> 
>  
> 
> Gesendet von Mail <https://go.microsoft.com/fwlink/?LinkId=550986> für Windows 10
> 
>  
> 
> *Von: *Christian Janssen DL1MGB <mailto:chris at dl1mgb.com>
> *Gesendet: *Mittwoch, 24. März 2021 21:05
> *An: *elecraft at mailman.qth.net <mailto:elecraft at mailman.qth.net>
> *Betreff: *[Elecraft] K3 - no output power
> 
>  
> 
> Hello,
> 
>  
> 
> it happened during the Russian DX Contest last Saturday, from one second to another. No output. When I tune the display looks like this: http://dl1mgb.com/temp/k3_no_power.jpg
> 
>  
> 
> Following conditions:
> 
>  
> 
> - sending into a 50 ohm dummy load
> 
> - no matter how many watts are set with PWR knob
> 
> - Test mode off
> 
> - TX INH off
> 
> - all driver transistors working (three screw test)
> 
> - no output power also on external watt meter
> 
> - happens on all bands
> 
> - happens with KPA set to "not inst"
> 
> - knocking on housing doesn't change anything
> 
> - when starting the antenna tuner, it says 5.0 watts, but no output on the external watt meter
> 
>  
> 
> I am running out of ideas :-)
> 
>  
> 
> 73s Chris DL1MGB
> 
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