How much simpler SDR has made this sort of thing...
73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist
ARRL Asst. Director, NW Division, Technical Resources
On 2/21/20 5:10 AM, AA5CT via RFI wrote:
In the "olde days", Jim, we would tune across the band
and note any similar buzzes at xx kHz apart IF indeed we
could find any more 'buzzes'. With powerline arcs,
the spectra is continuous, there are no discrete 'buzzes'
every xx kHz as with a switching power supply working
at say 48 kHz. Anyway, once this short search is done,
a mental picture (in the mind) is assembled, which can
then be passed along to others using words in print.
73 de AA5CT Jim
.
.
On Thursday, February 20, 2020, 10:48:09 PM GMT-6, Jim Brown
<jim@audiosystemsgroup.com> wrote:
On 2/20/2020 6:04 PM, qrv@kd4e.com wrote:
Anyone have a guess as to the source of this noise?
The most useful "picture" of RF noise is a spectrum and waterfall, at
least 200 kHz wide. Wider views can also be quite useful. Study NK7Z's
website.
73, Jim K9YC
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