[RFI] 8 KHz spurs across much of amateur spectrum

[David Robbins]

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 at arrl.net
web: http://wiki.k1ttt.net
AR-Cluster node: 145.69MHz or telnet://k1ttt.net:7373



-----Original Message-----
From: RFI [mailto:rfi-bounces at 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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