Thank you Jim for your great input on my issue. Cheap Switching supplies are
just crap. I also have some additional noise whirling through the 6 meter band
because of holiday lighting now. The ANC4 is looking better every day !
Based on my DF findings and the RFI patterns, i believe there maybe an
appliance that gets used in the evenings at roughly the same time. Could be
lighting also. Not sure. I need to approach my neighbor sometime somehow.
Everyone that chimed in with advice, thank you. Its appreciated.
Happy Thanksgiving
73 Stephanie
> On Nov 20, 2023, at 5:47 AM, Jim Brown <jim@audiosystemsgroup.com> wrote:
>
> On 11/20/2023 1:16 AM, Jim Brown wrote:
>> This is clearly power-handling electronics,
>
> Some tutorial thoughts for those with less technical background, and who have
> not taken the time to study enough to have earned their license, which both
> requires and depends upon technical competence! We have the operating
> permissions we do BECAUSE we supposed to be are technically competent. I am
> one of many who studied the ARRL License Manual to pass our license exams (me
> at age 14), but the responsible ham goes back and works to actually LEARN
> that stuff. For many of us, it led to a career in some form of electronics or
> communications. I ended up in broadcasting and pro audio; others put us on
> the Moon and Mars. K4BAI and W6OAT, both of whom I worked fairly often as
> teenagers, became lawyers and a bankruptcy judge. At age 82, I'm still trying
> to learn new stuff, and all my life I've tried to share what I've learned.
>
> Traditional power supplies rectify to produce half-sine DC, which must be
> filtered to produce DC. Because the power frequency is 60 Hz, that requires
> larger filter caps (translate to more expensive and large).
>
> Switch-mode power supplies include the traditional power supply, but then use
> that DC to produce square waves in the range of 10 kHz; their period is FAR
> shorter, so the required filter caps are MUCH smaller, and cheaper. As one of
> the earliest measures to save energy, switch-mode power supplies were
> mandated by law a couple of decades ago, but Congress failed to fund the FCC
> to enforce their own Rules (Federal Law) that required that they not cause
> harmful interference. It is safe to assume that 99.9% of these products are
> noise generators.
>
> 73, Jim K9YC
>
>
>
>
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