Two relays are changed with a rotary swith. I learned a push push doubler on the ARRL handbook. I will explain about a transmitter. This signal modulates the frequency of the VXO oscillator. The coil of the VXO is made of FB801 ferrite.
Variable capacitor is made by power diode.
VXO signal is converted for 51MHz with high level mixer. I will explain about a receiver. Please see the another page of my homepage in order to understand it. 144MHz receiver is made to develop this transceiver. IF amp are constructed with FET amplifier.