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Old 27-Mar-2020, 1:57 PM   #7
Tower Guy
Senior Member
Join Date: Dec 2009
Location: Delmar, NY
Posts: 1,234
There is sufficient signal at your house for NBC and PBS. What's different about those two channels is that they are on VHF. The others are UHF. You have the right antenna for VHF.

So I would guess that the problem is caused by interference or something in your system that passes UHF but not VHF.

Typical sources of interference are:

LED lightbulbs
switch mode power supplies
Solar panel inverters, etc.
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