Originally Posted by
pkoury
Futaba does not warn against using longer antennas. I have seen competition sailplanes (they fly long distances riding thermals) using the 400mm length with no problem. Can you send me a link to information regarding the signal loss data?
Having the longer antenna is definitely better than having the antenna inside a carbon fiber fuselage, but all coax cable has losses, so the longer the cable, the higher the losses. I've seen suggestions that the loss from the coax used on Futaba antennas is around 1.4 dB/foot
Bob