[Elecraft] PA set up issues

[Roger D Johnson]

GD0TEP wrote:
> Hi Don,
>
> Thanks for the info, I downloaded the program and carried out the
> calibration procedure, and yes, it was interesting to watch but didn't cure
> the problem.
>
> Here's the results I get, the power indicated is taken from the KW. I start
> out at 50w, then increase the power heading towards 100w:
>
> 160m - 97w & radio trips, next test found fine adjustment of front control
> made the 100w
> 80m - 100w Appears OK
> 40m - 100w Appears OK
> 30m - 100w Appears OK
> 20m - radio tripped off, next test found that all I could get is 85w before
> it would trip again.
> 17m - 94w & radio trips off, repeated attempts results in the radio tripping
> off @ 85w
> 15m - 95w & radio trips off, repeated attempts results in the radio tripping
> off @ 94w
> 12m - 90w & radio trips off, repeated attempts results in the radio tripping
> off @ 88w
> 10m - 100w
> 6m - 94w & radio trips off, repeated attempts results in the radio tripping
> off @ 86w
>
> So, now what should I try??
>
> 73,
> Andy
> http://gd0tep.com
>
>   
>
Hi Andy....

I had the same problem originally. It was the power supply current 
limiting! Supposedly,
a 25 amp supply, it would start limiting at about 18-20 amps. This 
dropped the voltage
which would cause the radio to shut itself off.

73, Roger