How do you make a walkie talkie?

Each radio needs a receiver and a transmitter. When the push-to-talk button is not depressed, the radio receives. An optional squelch circuit can be used to mute static.

When the push to talk button is depessed, the receiver is muted and the transmitter is activated. The details of this are left as an excercise to the reader. To make a radio, you may need a crystal diode.

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