[K3] [Elecraft] K3 power tripping out

[Alan Bloom]

On Thu, 2008-12-04 at 06:10, Jon K Hellan wrote:
> G4AFU Paul wrote:
> > For some unknown reason my K3 (897) tripped out 3 times last night when on
> > 160m cw. 
...
> This happens to me when SWR is a bit off, and also happened with my 
> previous rig. I haven't measured, but I suspect that it's pulling more 
> current, making the power supply voltage drop. 

If the power supply voltage drops, the K3 has to draw more current to
get 100W output.  That can cause the over-current sensor in the K3 to
trip.

I found that, in addition to voltage sag in the power supply itself, I
was getting three-quarters of a volt drop just in the power supply cable
(the one that was supplied with the K3).  I don't need all that length
so I cut it in half to reduce the voltage drop.

Al N1AL