[Elecraft] K3 - no output power

[Christian Janssen DL1MGB]

Update:

- reseted all TMP connectors
- already changed the pin headers at the KPA3 (had the 12V ERR some months ago), since then radio was good for some hundred QSOs
- no transverter available
- serial number is 1532
- K3 receives without any problems
- uploaded the newest firmware

No change.

I don't have a spectrum analyzer, but I will look with my eyes if there is something noticeable.

73s Chris DL1MGB


Am 25.03.2021 um 02:35 schrieb Ray:
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> Harald
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> I think you need to start at Ground Zero,,,,,,
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> Go to your Elecraft Utility
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> And connect to the K3 Radio and verify
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> The Firmware is present (05.67 ect)
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> I would go to the Basic mode of operations.
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> Set K3 to SSB operation Upper or  Lower , Freq middle of band.
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> Set radio to PTT (not VOX) Ant 1, load to Ant 1.
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> Verify on K3 DVM , voltage is 13 volts.
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> Push Tune button (long for TX – with RF)
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> Adjust PWR knob Clockwise for Max RF power.
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> Take readings………. Ray WA6VAB  K3  
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> *From: *Christian Janssen DL1MGB <mailto:chris at dl1mgb.com>
> *Sent: *Wednesday, March 24, 2021 1:49 PM
> *To: *Harald Fritzsche (DD0VS) <mailto:Harald.Fritzsche at dd0vs.de>; elecraft at mailman.qth.net <mailto:elecraft at mailman.qth.net>
> *Subject: *Re: [Elecraft] K3 - no output power
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> Hi Harald,
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> spectrum analyzer and more space on the table would be the best, but both not available :-)
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> Additional information:
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> - internal voltage / current (DISP)
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> Standby: 13.8 V / 0.86 A
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> Tune: 13.4 V / 3.20 A
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> And still no power output on the external wattmeter.
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> It seems that there is something produced, but it doesn't exit the K3.
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> I also did an EE INIT, ut no change.
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> 73s Chris
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> Am 24.03.2021 um 21:32 schrieb Harald Fritzsche (DD0VS):
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>> Hello Chris,
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>> strange is, that your Display does not show a frequency, but it should.
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>> I had a water Intrusion in 2019 which causes several defects.
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>> 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.
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>> Receiving is working?
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>> Vy73 & GL
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>> Harald
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>> DD0VS
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>> Gesendet von Mail <https://go.microsoft.com/fwlink/?LinkId=550986> für Windows 10
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>> *Von: *Christian Janssen DL1MGB <mailto:chris at dl1mgb.com>
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>> *Gesendet: *Mittwoch, 24. März 2021 21:05
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>> *An: *elecraft at mailman.qth.net <mailto:elecraft at mailman.qth.net>
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>> *Betreff: *[Elecraft] K3 - no output power
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>> Hello,
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>> 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
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>> Following conditions:
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>> - sending into a 50 ohm dummy load
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>> - no matter how many watts are set with PWR knob
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>> - Test mode off
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>> - TX INH off
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>> - all driver transistors working (three screw test)
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>> - no output power also on external watt meter
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>> - happens on all bands
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>> - happens with KPA set to "not inst"
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>> - knocking on housing doesn't change anything
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>> - when starting the antenna tuner, it says 5.0 watts, but no output on the external watt meter
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>> I am running out of ideas :-)
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>> 73s Chris DL1MGB
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>>
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