The RF generator circuit is shown composed of an oscillator transistor and fanal transistor. This can put out .5 watts. Current draw should be about 120Ma. This is for 27Mhz.

The schematic diagram shown is that of an encoder for a transmitter.

-first two transistors form a free running multivibrator(flip-flop). Q1 is On and Q2 is Off and vice versa. There is a duty cycle of about 20 milliseconds(MS). Subsequent transistors are timer circuits triggered by the previous Q(Q=transistor). The 5k POT sets the delay when to fire the next Q. When the timer Q turns on, it send a .25MS pulse to shut off the carrier wave of an RF generator.

-So, the TX send a frame of .25MS pulses to clock a decoder at the RX. This schemactic diagram is for a 2 channel system. The three diodes send three pulses and the space between pulses is the time a channel port in the decoder remains on which the servo recognizes and positions itself.

To add more channels, add more timer Qs.