Originally Posted by OTAhead
I would suspect corrosion in a connection with the coax. this has happened to me. If you are using an amp, check the short piece of coax that is attached from the balun to the amp. Look for discoloration. It sometimes appears as a white powdery looking substance on the connection. Moisture is a major culprit of loss of signal.
If you find corrosion anywhere in the coax line, remove the offending connection and put a new clean one in its place. Get some di-electric grease and fill the f connector with it, screw it on the receptical for it and seal the connection with silicone sealant or tape it very well with electrical tape. Keep the moisture out by any means necessary.
I would wager to guess that you will find corrosion. As a rule, antennas just don't go bad... Good luck.
It goes unsaid, but hey, thanks everyone for helping out on this! It's always nice to be able to bounce ideas.
Corrosion sounds like a culprit and I will check on that. The antenna coax line is running from antenna to a line coupler near the chimney (where all DTV lines enter the roof.) The line couples together (it's wrapped with electrical tape) and runs through the attic and down into a junction box to a TERK BMS-58 5x8 multi-switch, which is dedicated for the OTA antenna only. So, the power coax on it is inside the house (and the junction box for that matter.) The only place I could have corrosion would be outside where the lines couple or connect to the antenna coax out. I can always replace the RG6 line, no problem.
I may have failed to mention this, but it's only 9-1, 9-2, 10-1 and 10-2 that is out. When one goes, so goes the other. 25-1, 25-3, 44-1, 34-1, 34-2 are not a problem and have always been steady. It's only the lower band frequencies. That's why I suspect the antenna, itself at this point.
Does anyone know if the frequencies for these channels are actually on the low VHF or high VHF?
Update: I talked with L&M Electronics today. The only thought was that maybe the multi-switch is failing. I was told that there are seperate resistors on the inside for VHF and UHF and that the VHF side could be damaged. I bought a pre-amp, got it hooked up and took the multi-switch out of the loop. No dice, in fact, I lost 44-1! So, I am picking up a Winegard HD-7015 tomorrow and, weather permitting, have it up sometime Wed a.m.
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