[humper]

Hi,

So this weekend I installed the Clearstream C2V Complete on the 12th floor of my building, against a concrete wall using the 20" J mount mast and bracket. I have pointed it at 130 degrees magnetic compass direction. I installed the Channel Master CM3410. I'm using the 30ft of coax that comes with the C2V. There is one TV connected, and no splitters.

This weekend the weather was sunny above 0 degree weather, and I was able to receive the following channels:

Perfect Reception:
31.1
35.1
36.1
4.1 (CBS)
6.1
11.1
13.1
26.1
28.1

Moderate Reception:
23.1 (CW) - Comes in fairly well, but a fair amount of artifacts

Weak Reception (comes in/out):
7.1 (ABC) - this one is in and out a lot depending on weather
49.1 (MyN) - I haven't received reception on this channel since Sunday
2.1 (NBC) - this one is TROPO and I haven't gotten reception since Sunday

No broadcast:
29.1 (FOX)
17.1 (PBS)

The weather seems to play a big factor in reception. The last couple days have been overcast with some snow.

My question is, can I improve reception for the US stations (23.1, 17.1, 29.1, 7.1, 2.1) in anyway? A preamp or another antenna?