chk braker ?

[Erwin Witt - DK5EW]

Hi all,

one more question pse:


I have seen in the display once a message when turning power knob named "chk breaker"
Not sure if message name is correct it comes only ones and seldom.

Any idea on that ?

73's Erwin/DK5EW


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[Erwin Witt - DK5EW]

OK it was the backside fuse I pulled it in now.
When turning now the power knob K3 is switching off, voltage on ps is going down and K3 PA unit is getting quick vry hot.
Next is I disable pa unit.

73's Erwin/DK5EW

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Erwin Witt - DK5EW schrieb am 13.04.2020 08:53 (GMT +02:00):

> Hi all,
>
> one more question pse:
>
>
> I have seen in the display once a message when turning power knob named
> "chk
> breaker"
> Not sure if message name is correct it comes only ones and seldom.
>
> Any idea on that ?
>
> 73's Erwin/DK5EW
>
>
> ______________________________________________________________
> 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]
>
>

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[KeithWE6R]

Hi Erwin;
You probably have a shorted D12 on the KPA3, and maybe an identical one
on the RF board near power connector, D28.
These go short from over-voltage.
I would check your voltage! These clamp and short at just above 15V.
They should be replaced. You can clip out if you need to operate in an
emergency, just don't overvoltage the radio without them, very expensive
(if even possible) repair will happen.

You will have to PULL the KPA3, not just set to not inst. The DC to it
is HOT all the time.
Keith WE6R
Elecraft K3 Tech
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