If they are pure and stable I would not assume a power supply, most of them are
wide and drifty. Pure carriers are more likely a computer, tv, or other
electronic device source.
Most switching supplies I have found run at lower frequencies, 50-100khz, and
as their harmonics increase they get wider and weaker until they overlap and
create continuous hash on higher bands.
David Robbins K1TTT
e-mail: mailto:k1ttt@arrl.net
web: http://wiki.k1ttt.net
AR-Cluster node: 145.69MHz or telnet://k1ttt.net:7373
-----Original Message-----
From: RFI [mailto:rfi-bounces@contesting.com] On Behalf Of N4ZR
Sent: Tuesday, March 13, 2018 11:42
To: RFI List
Subject: [RFI] 8 KHz spurs across much of amateur spectrum
This may be a fool's errand, but just in case - I have discovered relatively
pure carriers every 8 KHz 2-28 MHz (not heard on 160), tapering in strength as
the frequencies get higher. I assume some sort of switching power supply, but
from what I've read most run at higher frequencies than that. Is this by
chance a signature of a particular source?
--
73, Pete N4ZR
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