reception moved 90 degrees!

[navychop]

Here in northern Virginia, most of my stations are at around 60 degrees, and reception has been fine. Now that the leaves have fallen, which may or may not have any effect on this, reception is poor at 60 degrees. But now it's good at around 115 to 150 degrees. Broadside reception? Mostly we are talking about UHF digital stations. Yes, there are plenty of trees around. And the antenna is in fact rotating and aiming in the noted directions, so it's not a rotor calibration issue.

I have the Channel Master 3671 with CM rotor and a pre-amp. Antenna is on the second floor roof, up about 8'.

What could cause this? The stations haven't moved, per antennaweb.

 

[Miner]

Suppo,

Could it be signal overload when aimed directly at the station, but an acceptable level when turned away from the stations? With all the leaves fallen, there is more signal reaching the antenna. If I understand, many antennae have a smaller gain lobe around 60-75 degrees from the front, and some gain even at 90 degrees.

Miner

 

[navychop]

Now that's a thought. I might climb up there and bypass the pre-amp and see. Bad time of year for that, though.