Here is the specification of the transmitter: No. of stage: 4 Frequency of operation: About 100MHz Antenna type: Folded 300 ohms dipole. Range obtained in free space: Up to 4km with dipole antenna 30 feet above ground level. More range with yagi antenna. Fig: Circuit diagram of the Transmitter Brief Description:- The transmitter is built on a Printed Circuit Board. This board uses track inductor for L1, L2 and part of L3. The section built around Q1 is the oscillator section. Oscillation frequency is determined by L1, C4 & C5 which forms the tank. Actually C5 is the feedback capacitor. This is required to sustain oscillation. This also influence the operation of tank formed by L1 & C4. Modulation is directly applied to the base of Q1 via C2. A microphone is connected here to serve this purpose. You can alternately feed direct audio here after disconnecting the microphone biasing resistor R1. Q2, Q3 & Q4 gradually raises the output power up to the desired level. A...