Yes, that was it. I just tested it and sure enough it's the power supply. I had the idea that it might be the supply only being noisy under load and that was it. Confirmed. The Pi makes the S meter move too, but not anywhere near what this thing is doing. Time to get a new supply I guess.
Sorry for reducing the SNR. -Bob On Mon, May 23, 2016 at 7:25 PM, Nate Bargmann <n...@n0nb.us> wrote: > * On 2016 23 May 17:05 -0500, Bob Darlington wrote: > > Hey, a little OT, but I discovered today that my raspberry pi took my > noise > > floor from S9 constant (with some peaks higher) down to an S4 with peaks > > around S5 once I unplugged it. These things are BAD. I can't vouch for > > the r-pi 2 or 3 but I can say that my APRS digipeater is now off the air > > because of it till I get everything into a shielded metal enclosure. > > Actually, I found the wall wart one uses makes a lot of difference. I > had a couple to choose from and chose the one that was least noisy. > > 73, Nate, N0NB > > -- > > "The optimist proclaims that we live in the best of all > possible worlds. The pessimist fears this is true." > > Ham radio, Linux, bikes, and more: http://www.n0nb.us > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to rdarling...@gmail.com > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
