K3 Sticky Power Control

[engineercm]

I have an older K3 that is up to date with firmware and is acting odd when I
try to change the power out using the PWR control on the front panel. I can
change power fine using a macro but wonder why the control acts so strange.

Please forgive me for the bandwidth if this has been discussed before, but
all the search permutations I tried using PWR, Control, Sticky, Problem
turned up nothing.

Clark/WU4B



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[Grant Youngman-2]

Do the other functions on that control also behave oddly?  (Mon, Cmp)

Grant NQ5T
K3 #2091 KX3 #8342

> On Nov 7, 2018, at 8:04 PM, engineercm <[hidden email]> wrote:
>
> I have an older K3 that is up to date with firmware and is acting odd when I
> try to change the power out using the PWR control on the front panel. I can
> change power fine using a macro but wonder why the control acts so strange.
>

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[engineercm]

Hi, Grant.

Great suggestion.  MON and CMP functions work fine.  The PWR behavior is
that sometimes the power level indicated on the display will not move (or
move a few watts) no matter how much I turn the knob.  Other times it may
move down 10w or so and then won't go lower.  

It seems to be intermittent.  I don't need to adjust the PWR often: only
when I'm running QRP with it instead of the K2.  Setting up Macro for that
is probably the easiest solution.  

Clark/WU4B
K3 #3645



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[Grant Youngman-2]

So it’s probably not the rotary encoder.  My first guess is that it could be related to oxidation on the front panel pins where they plug into the main board.  Or pwr cal maybe? — not sure if that could cause these symptoms.

Others here (likely smarter and better looking) may have a better idea ..

Grant NQ5T
K3 #2091 KX3 #8342

>
> Great suggestion.  MON and CMP functions work fine.  The PWR behavior is
> that sometimes the power level indicated on the display will not move (or
> move a few watts) no matter how much I turn the knob.  Other times it may
> move down 10w or so and then won't go lower.  
>

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[Nr4c]

Check the knob for cracks. Many K3S suffer from cracked knobs. If yours is cracked, call Madelyn at Elecraft and explain which knob(s) are cracked and they will send you replacement(s).

Sent from my iPhone
...nr4c. bill

> On Nov 7, 2018, at 8:46 PM, engineercm <[hidden email]> wrote:
>
> Hi, Grant.
>
> Great suggestion.  MON and CMP functions work fine.  The PWR behavior is
> that sometimes the power level indicated on the display will not move (or
> move a few watts) no matter how much I turn the knob.  Other times it may
> move down 10w or so and then won't go lower.  
>
> It seems to be intermittent.  I don't need to adjust the PWR often: only
> when I'm running QRP with it instead of the K2.  Setting up Macro for that
> is probably the easiest solution.  
>
> Clark/WU4B
> K3 #3645
>
>
>
> --
> Sent from: http://elecraft.365791.n2.nabble.com/
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
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> 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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