[Elecraft] KPA1500 power supply noise

[Roy Koeppe]

Hi Don,

I hear nothing at all from my supply there or anywhere else so far. My power
supply is under the table on a low stand, so is less than 3 feet from the
K3s. Just FYI, but it seems I would hear something.

73,    Roy       K6XK              Iowa




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