[Elecraft] K3 strange power surging behavior

[Keith Onishi]

My friend and I had similar power surge issue with our brand new K3. Having thoroughly made trouble shooting, we found the cause mostly coming from outside K3 or some glitch on constructing K3. I would recommend to carefully check your entire system including coaxial cable to your antenna system as well as inside K3 especially KPA3 to antenna connector.

73 de JH3SIF, Keith

2014/07/08 11:09、NZ0T <nz0tham at gmail.com> のメッセージ:

> 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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