K3 strange power surging behavior

[David Gilbert]

Hardly.  That's got to be one of the silliest extrapolations I've seen
in a very long time.  The much more plausible implication, especially
considering the history of the several thousand K3's that have seen
pretty hard service around the globe, is that Elecraft wants to gain
bonus points with the most visible of their customer base by having an
engineer on standby to support their product.

Thanks for the calibration, though.

Dave AB7E




On 7/8/2014 12:37 AM, David G4DMP wrote:
> How many K3s are there in a 'bunch', Jim? The implication would appear
> to suggest that there are likely to be problems requiring a best
> Elecraft engineer to fix them.

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[JHRichards]

Oh...  I see ... just another screw loose...

;-)

================== K8JHR ===================

On 7/8/2014 7:52 PM, NZ0T wrote:

   The rig worked perfectly after I tightened the screws but did
> the calibration to be safe and passed with flying colors.
>
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[Randy Diddel-2]

I had a similar issue with my K3, it only happened on 15M.  It got even
worse with my KPA500 in operate mode.  I removed everything but a dummy
load and then started adding things back-RX antenna, KPA500, P3, etc...  In
my case, it turned out to be the mic cable pigtail. I put about a pound of
ferrite on it and the erratic power output has gone away.

As a side note, I even sent it to Elecraft to see if they could find the
source and as they correctly suggested, it turned out to be a local issue
with my shack.  The odd thing was that nothing about my shack had
changed-operating position, antenna location, etc.  It just started one day.

Good luck,

73

K5RHD

/randy



2014/07/08 11:09?NZ0T <[hidden email]> ??????:

> My K3 SN 1502 with MCU 4.83 is exhibiting a strange surge in transmit
power
> level.   When the rig is keyed in CW with the power set all the way up
power
> output surges from a high of around 140 (!) watts down to 60 watts and
back
> in a rapid fashion.  It is at it's worst on 30 meters shows at least a
high
> power spike on all bands except 160 and 80 before it settles down to
around
> 100 watts.  If I turn the power down the cycling is much less severe but
> there is still a leading spike of around 140 watts.  I have tried
reloading
> the firmware with no luck.  I have checked all my jumpers and connections
> and they are fine and the rig does this even straight into a dummy load.
 My
> power supply is an Astron RS-35M in great shape.
>
> I should mention that we suffered a lightning strike last Labor Day
weekend
> that took out my Ten Tec tuner, W2 wattmeter and a few other things but
the
> K3 was not affected at all and I hope this problem is not some delayed
thing
> from that strike!
>
> An ideas?  The rig is almost six years old - maybe I need to open it up
and
> make sure screws are all tight?
>
> 73 Bill NZ0T
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