Small enough?

Horizon Hobby UK are shortly to distribute two new Spektrum 2.4gHz receivers that should be on UK shop shelves very soon - the AR6300 and its big brother the AR9100.

Effectively a small circuit board with connectors attached and designed for slow flyers, the tiny 6-channel AR6300 weighs in at 2g and employs the DSM2 system. The JST connecters are compatible with Spektrumís programmable DSP60J Digital Super Sub-Micro Servo. Dimensions are (WxLxH) 18.35mm x 28.55mm x 7.06mm, the voltage range is 3.5v-9.6v and the antenna length is 30mm. The unit retails at £44.99.

At the opposite end of the..er..spectrum, the 9-channel AR9100 is a full-range receiver system that can be used with any type and size of model aircraft but particularly for models using multiple servos that draw excess current or multiple high-torque servos that would feature in giant-scale planes and jet models. It features a robust power bus designed to manage high-current loads, as well as two battery input leads with EC3 connectors for use with larger packs.

Up to four satellite units can be attached to the AR9100

This makes it possible to support high-current systems straight through the AR9100 without the need for a separate power system. As an added measure of safety the unit has a soft switch - servo current is routed around the switch so, should it fail for any reason, power to the system will not be interrupted. The unit retails at £134.99.