The following information has
been received from the manufacturers on what channel spacing
All current sets will operate at 10 KHz, however,
they do only supply xtals at 20KHz Channel spacings,
starting at (tba) So these can operate on either the new 35,
or 36 MHz bands.
All current sets will operate at 10
KHz, as will some older sets, but for safety, it would be
wise to operate non- current sets on a 20 KHz channel
spacing. So these can operate on either the new 35, or 36
All sets must be on a 20 KHz channel
spacing, so only the 36MHz band can be used. However, Hitec
sets have not been imported on 35 nor 72 MHz, and in limited
numbers on 36MHz. Synthesized modules (and synthesized
receivers) on 36 MHz only, will be brought in for those with
Prism 7X, Eclipse and Optic 6 transmitters.
model shops do have local technicians that can carry out
retuning, Check with them.
use imported 35 MHz crystals in older sets. The set may
work, but may also be off-frequency, or have too wide a
bandwidth, thus causing severe problems to other users. The
35 to 35.5 MHz band is for 10 kHz channel spacing only.
Current production systems manufactured by Futaba and JR
only, at this stage. Hitec equipment must operate at a 20
kHz channel spacing, i.e. 36 MHz. If you want to put an
older set into this band, then it is imperative that you:
only the correct manufacture’s xtals
Ensure the set is properly tuned by a service agent., and is
considered suitable, by measurement, to operate at a 10KHz
also want to be careful with older sets in any event, and
the test written by the British Model Flying Assn. some
years ago is an easy and effective way of doing this:
check is quick and easy to do. Flyer A switches on
transmitter (with aerial down), then switches on his
receiver and stands about 4 metres from his model. Flyer B,
on an adjacent channel, switches on transmitter (aerial up)
and stands alongside flyer A. No interference should be
noted on A’s model and it should be under the full control
of A’s transmitter. The test is then repeated using B’s
model and with his transmitter aerial down and A’s
interference noted indicates possible tuning or crystal
problems and must be investigated further. The test may save
your model, as it will give early warning of problems
beginning in your radio equipment, usually well before they
become bad enough to cause control problems in the air.
is any doubt, or the above tests show any sign of
interference, take the peg either side of the one you are
operating on, for an extra safety margin.
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