Richard,

Welcome  to the world of high power.   How do you have the radio 
grounded?   How close is the antenna to the operating position?

I would invest in some ferrites.  E-bay is a good source.     I would 
clamp the AC line to the power supply, and the  12 vdc line coming out. 
   Also clamp everything  connected to the radio/amp (coax, power, 
control cables, etc.).    The other school of thought is to only clamp 
things until you find the  one that is the problem.

If your antenna is 5 feet from your operating position, things may be 
more problematic.  As Ron suggests, antenna/feedline/balun  may be the 
culprit.    Sometimes this stuff is hard to solve, glad you have help on 
site.


73, good luck, Steve KW3A

On 1/14/2016 9:48 AM, Richard B. McDonald wrote:
> Hi!
>
>
>
> In the process of setting up my Ameritron ALS-1306 amp with my Kenwood
> TS-2000 and an MFJ 998 tuner, sometimes RFI shuts down the TS-2000's power
> supply.  My Elmer is convinced it is RFI because 1) it seems only to happen
> on 20M (so far, anyway) and 2) it only happens when we crank-up the 1306
> beyond ~200W.  The 1306 is on a totally different, dedicated power line:
> 240V.  The TS-2000's power supply is on the household's 120V.  The power
> supply for the TS-2000 is an Astrin SS-30
> <https://www.hamcity.com/store/pc/SS-30-p363.htm> .  So, what can I do to
> stop this?
>
>
>
> 73,
>
> Richard KK6MRH
>