Safety Precautions
Thank you for purchasing this CIRRUS 3CFM computer radio control system. Before using this radio, and to ensure
your safety and that of others, it is important that you read this manual thoroughly, and understand it, prior to
installation and operation. After reading this manual thoroughly, store it in a safe place so that you can easily find it
again should the need arise.
Just as commercial radio stations have their own frequency bands, so do radio control systems. Each radio
control system comes with a sticker on the transmitter and on the receiver showing which basic frequency the
radio control system operates on (27MHz, 40MHz or 75MHz band). Each main frequency is broken down into
various sub-frequencies, called channels (e.g. 27.045MHz, 27.145MHz, etc.), which allow multiple models to
operate together without interference. In order to be able to operate on different channels the transmitter and
receiver are fitted with removable crystals. Each crystal will have its actual frequency printed on it and details
of whether it is for transmitter (Tx) or receiver (Rx). Crystals are matched in pairs (e.g. Tx 27.145MHz and Rx
27.145MHz). Transmitter and receiver crystals (matched pairs) can be purchased separately and changed if
interference is detected (someone operating on the same frequency as you). As a rule it is always good to carry
at least one spare pair of crystals to allow for this possibility.
Note: The 3CFM transmitter has a location to store a spare pair of crystals located inside its battery
compartment.
Before Operation
Should any item be missing or if you are uncertain of the contents of the system, please contact the dealer from
whom you purchased the system before use.
27MHz and 75MHz
These frequencies are legal for use in North America.
27MHz and 40MHz
These frequencies are legal for use in Europe, but can vary from country to country.
DISTRIBUTED IN NORTH
AMERICA BY:
Global Hobby Distributors
18480 Bandilier Circle
Fountain Valley, CA 92708
DISTRIBUTED IN
EUROPE BY:
Ripmax Ltd.
241 Green Street
Enfield, EN3 7SJ, U.K.
The contents of this manual are subject to change without prior notice.
Ref: 3CFM1
2
Spare Crystal Storage
Battery Compartment
