For those who have been baffled by carriers on 1830, I offer this possible
explanation.
Look around for something with a switching power supply in it, or maybe an
old computer.
I have a fax machine in the shack, and when it is on, there is a steady
carrier on 1830, and assorted other frequencies. Actually it is not a
carrier, but more like a buzzing with multiple frequencies. Could be
mistaken for broadcast mixing products.
When I turn off the power, 1830 is ready for weak signals again!
It's only a problem when I forget to turn it off.
73, Andy N2NT
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