Originally Posted by mr100watt
Using one dipole antenna on an Insignia CECB, tuned to one UHF station in the afternoon locked in a clear signal. Adjacent to that hookup was an RCA model ANT145 VHF/UHF dipole/loop antenna with an inner plate and a fine tuning knob on a Pal Plus tuned to the same UHF station locked into the same clear signal at the same time. Daytime weather was clear and sunny, little wind.
That night with a small amount of rain barely coming down and a bit more of a breeze, I turned on my tv and to my surprise, neither box received any signal from the station that had come in clear that afternoon.
I had to experiment with pointing the antennas in various direction for some time before a picture was received, and for the first 15 minutes or so, the picture broke up. About fifteen minutes into the program, the picture reception was almost as steady as it was earlier in the day. (The rain had stopped and there was less of a breeze.)
What puzzled me was how different the position of the antenna was inorder to get the same degree of reception as earlier in the day.
I had the two antennas about twelve inches from each other with identical angular position of the dipoles, and both the Insignia and Pal Plus held the station's picture with almost identical strength.
I had a concern that the proximity of the antennas to each other might interfere with the reception on one or both of them, but it didn't seem to matter. The tuners/boxes were about two feet from each other and were at different levels from each other. I didn't know if the UHF loop/plate position would affect the dipole antenna connected to the Insignia.
With the RCA antenna, I don't understand the relationship between the dipoles and the UHF loop/plate for receiving the signal from the UHF station. I have to have the dipoles pointed in a particular direction at a particular angle yet I also have to have the "plate" for the UHF loop angled in a particular way to get the signal also - if I leave out one of these things, the station doesn't come in, or, at least, not as well.
What I have learned is that OTA reception from these converter boxes is going to be dependent on atmospheric conditions more than I'd like. I'd think that stations with a digital signal lower in the number assignment would result in a signal less affected by weather conditions since the signal transmission consists of longer wavelengths.
It seems that it is in the nature of these converter boxes, given the nature of digital transmision OTA, for reception to deteriorate proportional to deteriorating weather conditions. How do people in the midwest and surrounding areas watch tv on nights when there is a tornado in the area? The warning on the tv screen might not even be viewable. : O