[Elecraft] KPA1500 RFI on 10 Meters

[Alex Malyava]

I had the same issue with homemade SS amp on 6m band... the noise, flat
uniform broadband white noise, was coming from no name chinese power
supply. The main one ( brandname 50V/50A) was no problem, but this one (
used for service voltages and CPU ) was generating RFI and its wires were
right next to the SWR bridge. The noise was getting into the receiver and
raised noise floor 5-6dB. No issue on HF, but 6m suffered really bad.

K2BB

On Sat, Dec 14, 2019 at 16:45 K9MA <k9ma at sdellington.us> wrote:

> I guess it just shows how little I've been on 10, but I've had the
> KPA1500 for over a year now, and I just noticed that when I turn it on,
> my noise floor on 10 goes up about 3 dB. (And that's from an urban noise
> floor.) It's pretty flat over much of the band, not typical switching
> supply noise. Has anyone else experienced this and found a cure? (Other
> than using the old amp tube.)
>
> 73,
>
> Scott K9MA
>
> --
> Scott  K9MA
>
> k9ma at sdellington.us
>
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