RE: Servo jitter
To clarify some things....pagers ARE liscensed to operate in the 72 MHz frequency band. Our R/C channels are spaced between the commercial-band channels that are used by pagers, fleet operators, radio-controlled cranes, highway patrol, emergency vehicles, and so on. We've had several pagers over the years that have caused some R/C channels to be unusable.
As far as cel phones are concerned, or other types of radio ransmitters, while their actual channels won't get R/C models, if the transmitter is close and powerful, then harmonics can get into our stuff. Some high-frequency signals can even get in to other parts of a transmitter or receiver and disrupt them.
TV channel 4 is just below the 72 MHz band. If you have a TV channel 4 transmitter near, then it can affect a lot of the 72 MHz band.
One problem with all this is that R/C use is secondary to any other use. If there are frequency problelms, the R/C'er can't complain. Just go somewhere else or use a different channel that's cleaner.
Bill Baxter, Manager
Hobby Services/Futaba Service
3002 N. Apollo Dr. Ste. 1
Champaign, IL 61822
USA
Service Phone: 217 398-0007
Email: hobbyservices (at) hobbico.com