N1DAY AND N1HO, EM85sg in NC and K4LY EM85wb in SC are within 38 km of each other and active this past week on 630M.  Last night K4LY was decoded 1352 times by 41 unique stations.  Station is a Monitor Sensors, ~45 watts TPO, to a 5/16ths wl 160M INV L with a mostly vertical 70' section and two flat top (top hat) mostly horizontal wires of 100' each one running due north and the other NNW from the 62' level on my 66' Rohn tower.  I added the second 100' flat top wire yesterday and think I saw some improvement over the previous nights.      I have a couple dozen noise spikes hurting reception right on 474.2- 477.2 mHz and originating from someplace outside my house. Some spikes are over 15 dB above the noise floor.   Any idea what the source of that interference might be?