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Author Topic: What is this noise?  (Read 9442 times)
AA9G
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Posts: 111




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« on: January 12, 2015, 06:23:41 AM »

Wondering what this might be. It's annoying me. Smiley
https://www.dropbox.com/s/eizi36tnn1s7h2c/20M%20noise.jpg?dl=0
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Ex KC9EEV.
N3QE
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Posts: 5598




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« Reply #1 on: January 12, 2015, 07:43:29 AM »

Are you talking about that meandering khz-wide stuff at 14065 or so, or the smaller wobbly at 14110? I usually attribute those to local switching power supplies. If you had a sound clip wav, I'd be glad to offer an opinion.
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AA9G
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Posts: 111




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« Reply #2 on: January 12, 2015, 10:55:35 AM »

I'm talking about the bright blue broadbanded hash in the waterfall corresponding to the hump in the panadapter over the same range.
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Ex KC9EEV.
ND6P
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Posts: 140




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« Reply #3 on: January 13, 2015, 08:12:19 PM »

Looks like a switching power supply or a DC-DC converter to me.

Jim/ND6P
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