[Elecraft] KPA1500 power supply noise

[Don Minkoff]

I just received my new KPA1500 last Thursday.  Ser. No. 316.  I ordered 
it in Visalia on April 20.

Tested it out on all bands and I am a very happy camper.  I decided to 
place the power supply about 8 inches to the left of my K3 on a small shelf.

I discovered that on 15 M, 21.020, I get a major switching power supply 
noise. The noise level as seen on my P3 goes up to S3.

Has anyone else seen this?  All the other bands are OK.  I gave the amp 
a very good test during the IARU contest. Temp never got above 74 C. Fan 
comes on at 60.  I received it with 01.63 firmware.

Thanks,

-- 
Don Minkoff
NK6A