Where can RFI (radio frequency interference) come from?
RFI can be generated by a surprising number of sources – some of them obvious, and some downright sneaky! First there are interference sources that are generated by RC transmitters: – Someone else’s RC transmitter on your frequency, left on at the field (in the pits, sitting on the transmitter rack left on, sitting in someone’s car left on – maybe never turned off when it left the house!) – Another RC transmitter on your frequency, but off-field. Examples of this are: * residents of houses around the field perimeter * someone flying a park flyer near the flying field (ouch!) * someone running a car or boat on an AIR RC frequency nearby (it happens…) * any other location within three miles where an RC transmitter is turned on Three miles is the spacing required by AMA between flying fields – mostly to prevent in-air problems where an aircraft is high and off-field towards the “other” field. You don’t want the receiver to be able to get confused by a signal from the “other” field as it
