I have used a Samlec 1223 with no RF noise apparent. And as for the Astrons that we all regret losing, those are linear analog and don’t do the noise thing. :)
> On Oct 8, 2021, at 20:49, Jim Brown <[email protected]> wrote: > > On 10/8/2021 4:14 PM, [email protected] wrote: >> The ubiquitous Radio Shack 22-124A (and its variants) power supply is >> a perfect match for the KX-3. Manufactured by the millions and cheaper >> than dirt on that watery place or under hamfest tables it meets the >> current-handling needs of the KX-3. > > I don't see comments on the elephant in the room -- most commercial power > supplies dump out lots of RF noise, both from their switch-mode operation and > their regulation circuitry. I would be VERY suspicious of any such unit not > specifically marketed to hams for use on the HF bands. > > The ProAudioEng PSU is quiet for the low current needed for receive, but is > noisy at the higher current of transmit. No problem if you're using only one > radio at a time, but bad news if you're listening on a second radio tuned to > another band while transmitting. It may be possible to quiet that noise with > ferrite chokes. I have one of these PSUs, but haven't tried to choke it. > > 73, Jim K9YC > > > > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [email protected] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
