This Superhet Receiver does not require AGC or RF control since it has satisfactory large signal handling capability as it operates with 4MHz intermediate frequency.
A set of 2-mter handheld radio transceivers along with Tigertronics RTX-12 Radio Modem were used in this project to provide a simple and functional result between microcontrollers long range data transmission.
The purpose of the project is to measure resistance values and generate R/C style pulses suitable for driving servos or testing R/C controlled robots without the transmitter as it uses an Atmel AT90S2313 AVR processor.