[RFI] RFI from Seagate USB Disk Drive

[N4ZR]

Since there are probably a lot of those out there, I thought I'd report 
finding that my Seagate USB 3.0 2TB disk drive was a major source of 
broadband RFI 160-10 meters. Oddly, the problem wasn't with the separate 
power supply (presumably switching) but with the drive itself. By trial 
and error, I found out that 14 turns of the DC power cord on a #31 
toroid right at the drive end eliminated the noise.  Reduced my noise 
floor on 160 by roughly 20 dB, to the point that I can actually hear 
atmospheric noise.  Step-by-step hi

-- 
73, Pete N4ZR
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