Tightly spaced stable interference lines 80 m in LA

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la3rk
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Last seen: 9 months 3 weeks ago
Joined: 2009/12/02 - 18:32
Tightly spaced stable interference lines 80 m in LA
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During evening hours and until some time during the night I have a number of tightly spaced lines (approx 10 hz apart). Very stable and masking reception. Have been there for some months. See attached image.

Do anybody know what their origin might be?

PS: They are not from inside the house as they are weaker on an loop inside the house.

73 de LA3RK