Specifications

No. Single-conversion crystals are not compatible with dual-conversion crystals.
See this URL for more info:
www.torreypinesgulls.org/Radios.htm
28.2.10. Can I change the transmitter channel by changing the trans-
mitter crystal?
An R/C transmitter is carefully tuned to a specific frequency. If you change the transmitter crys-
tal to a different frequency, then the other components in the transmitter will not be tuned prop-
erly and the transmitter may generate interference on adjacent channels.
In the US, this change is covered by FCC section 95.222 Rule 22. It is illegal for the user to
change the transmitter crystal to change the operating frequency.
If a transmitter does not use a transmitter plug-in module, then it must be sent to an authorized
service center to change the frequency. However, if the transmitter does use a plug-in module
(such as some Futaba models) then it is legal to change the module to change the operating
frequency.
In non-US countries, it may be legal to change the transmitter crystal, but it is not recommen-
ded to change the channel by more than two up or down (from the original channel) to avoid
detuning the transmitter and generating interference on adjacent channels.
See these URLs for more info:
http://www.rcgroups.com/forums/showthread.php?t=94580
http://www.torreypinesgulls.org/Radios.htm
28.2.11. Why are channel 20 and/or channel 21 not recommended for
use or banned at my flying field?
If there is a strong television channel on TV channel 4 nearby, then a transmitter on R/C on 72
Mhz channel 20 or 21 can cause interference on all 72 Mhz R/C channels.
For more info, see this URL:
www.rchelibase.com/radiofaq
28.2.12. Can I use brand X servos with brand Y receivers?
Yes. All R/C servos are compatible with all R/C receivers. However, some manufacturer's ser-
vos rotate clockwise, and some rotate counterclockwise. This can be compensated by revers-
ing the channel, however.
28.2.13. When should I move from an FP helicopter to a CP heli-
copter?
It is best to buy a CP helicopter after you have mastered everything which can be done with an
FP helicopter.
Basically, you should be able to hover in all four orientations, do forward/backwards flight, stall
turns, and slow pirouettes in both clockwise and counterclockwise directions.
Frequently Asked Questions
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