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1. LF: Re: Thanks for all the LF reports (score: 1): Author: "Alan Melia" <[email protected]>; Date: Mon, 24 Apr 2017 11:49:55 +0100; Colin the wavy line you display as your QRM is almost certainly a switched -mode power supply. the line at 1400 is a harmonic of the switching frequency and this is modulated by 100Hz giving the side; /rsgb_lf_group-archives/html/rsgb_lf_group/2017-04/msg00330.html (10,026 bytes)

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