Quote:
Originally Posted by Tower Guy
You can offset your two antennas to the left and right of the mast. The offset distance would be calculated to make the distance 1/2 wavelength at the angle toward WMFP when the antenna is aimed at WNYT-18. The antennas would still be in phase on the main beam.
There's also a channel 18 in St. Johnsbury, VT. How sure are you that the interference is caused by WMFP?
What's your goal with reception of 18? Are you having problems with channel 12? (The ERP on channel 12 will be increasing slightly.)
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OK, since a spec analyzer is not in hand, I am only going by my signal meter. I have pointed towards St. Johnsburg, and looked for some signal on 18, WVTB is only running 61 KW, if I remember, and I see no noticable influence on the meter, on 18, in that direction. Towards WMFP (121°), as I said above, the meter is all over the place, there is a very strong signal that appears to be unorginized, the TV won't lock the signal, but it knows it's there on 18-1. I can only assume 1000 KW "might" sneek thru to me on a duct. With rain, WNYT 18 is good, again assuming WMFP's signal is attenuated. And tropo maps obviously show numerous mountain ranges in the path.
And again, I don't really want to mess with the other local and DX stations that are great. Why WNYT 18? Same reason I built a 3 element yagi to get WRGB 6 trouble free....I didn't need it, but it was there and I wanted it. It's a Ham thing, you might understand. RF 12 is rarely a problem, but when it is a problem, it's usually at the wrong time, so a local NBC backup would be convienient.
Rich Klien suggested moving the antennas up or down...but if I'm right, I don't see that helping much. I'm a little confused about your suggestion, maybe you can elaborate a little more.....