Q. What types of planes should I use the 555 in?

A. The 555 receiver can be used in any type of Aircraft though it was originally designed for electrics and sail planes.

Q. How long should the antenna be?

A. The antenna is 42 inches (1050mm). If you are replacing the antenna, make sure to use a multi-strand wire of about 28 gauge.

Q. What crystal does the 555 use?

A. The 555 uses a dual conversion crystal. The part number is 66772xx (xx= channel number). To tell if your crystal is dual conversion or not, examine the pull tab. If the tab has a blue end and the letters 'RF' on it, then it is a genuine Hitec dual conversion crystal. Use only genuine Hitec crystals in the 555 or it will have decreased range.

Q. What transmitter will the 555 work with?

A. The 555 is available in three different configurations. The 28272 (negative shift) is for Futaba and Hitec transmitters when using Futaba 'J' servos. The 28572 (negative shift) is for Hitec and Futaba transmitters when using Hitec 'S' servos. The 28672 (positive shift) is for Airtronics and JR transmitters when using Airt 'Z' and JR style servos.

Q. Which way do the servos plug in?

A. Looking at the top of the receiver, starting from left to right, it is signal, positive and negative.

Q. What are the channel assignments?

A. Channel assignments are set by the transmitter being used. In the case of Hitec, channel 1 is ailerons, channel 2 is elevator, channel 3 is throttle and channel 4 is rudder.

Q. Where can I plug the receiver battery?

A. The battery can be plugged into any available slot.

Q. I have an ESC, which channel do I plug it into?

A. If you are using an ESC with a Hitec transmitter, plug it into the throttle channel (ch 3).