[Elecraft] K3 strange power surging behavior

[Don Wilhelm]

Bill,

I cannot assure you that this is not some delayed effect of the 
lightning strike,
However, try doing the TX Gain Calibration before anything else. You may 
want to run it 2 or 3 times if it does not help initially.

If that does not correct it, you will have to contact support for 
further assistance.

73,
Don W3FPR

On 7/7/2014 10:09 PM, NZ0T wrote:
> 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
>
>