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Joined: Thu, Apr 4th 2013, 23:31 Roles: N/A Moderates: N/A

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Plus or Minus QRM Apr 22nd 2014, 21:53 2 7,803 on 23/4/14

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Topic Author Posted On
What is RFI versus QRM? KD4SBY on 3/2/22
QRM is interference in general, regardless of the source, mostly because it's rarely obvious what the source is. QRN is static, like with wall switches and atmospheric noise. Not sure where / when the "man-made" and "nature-made" thing came about, but I don't believe they are generally understood meanings of those Q-codes.
Plus or Minus QRM kn0ji on 22/4/14
What does "plus or minus QRM" mean? I have seen that on several HF lists.

Noji Ratzlaff

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