Originally Posted by dixiedamsel
May a mere layman ask a question of you mighty technicians? Is there any difference in a multi-directional antenna and a rotary antenna. We have a stationary multi-directional antenna(about 30' high) and here on the north side of Hickory, we get around 30 to 40 channels depending on atmospherics. Would we do better using a rotor antenna? Also, does it make a difference that I had the installer hook it up to the old cable lines so we wouldn't have to run new?
It depends on your situation. If you are already (reliably) getting all the stations in your area, then there wouldn't be a need to make changes. You might want to go to:
Type in your address to determine what is available in your area, versus what you are currently getting.
As to your question about wiring, it would depend on how old your wiring is and what conditions it has been subjected to (i.e. moisture, heat, etc.). If it is not the current standard (RG6 cable), then you definitely might want to think about replacing the wiring.
About the antenna, the whole idea behind a multi-directional antenna is so it doesn't need a rotor. But that might come at the expense of some signal loss in any single direction. This is more of an issue though if you are in a weaker reception area. In those cases, a more 'directional' antenna may be needed. Even in those cases - many people can successfully avoid rotors depending on where the broadcast towers are located.
For example, if you live in Hickory, and you are only trying to get the Charlotte networks (located in Dallas, NC and N. Charlotte), you might get very good results by simply aiming a stationary antenna in the middle between those two geographic locations.
Sometimes, though, rotors are necessary, especially for viewers who want to pick up 'multiple' points on the compass. Rotors can also be very useful when a viewer lives in a fringe area and needs an antenna with as much 'gain' as possible to pick up the signal(s).
In those scenarios, you'd probably need something better than a multi-directional antenna. A classic case of where someone might use a rotor would be when using a highly directional antenna, such as the Yagi style antenna. But given your location in Hickory, I would suspect you may not need a rotor.
The only remaining questions are, is your wiring adequate? Could you be getting any better results with another antenna (i.e. 4 bay antenna)? From your post - it sounds like your antenna is outside.
Hope this helps you in some way. No 'technician' here. Just someone who has played around with OTA for a number of years. Maybe others can chime in here if you have further questions.