Figure 5.14. The gate of an F E T, MPF102 goes to ground through a 47 k ohm resistor. The gate also connects to one end of a 2 MHz quarts crystal. The other end of the crystal is grounded. The gate of Q1 connects to one end of a variable capacitor labeled 7 to 45 pf trimmer. The other end of the variable cap goes to the source of the F E T. The source goes through a 110 pf cap to ground. The source goes through a 390 ohm resistor to ground. The source also goes through a 0.1 u f cap to the base of Q2. The drain of Q1 goes to plus 5 volts. Q2 is a 2N3904. Its emitter is grounded. Its base goes through a 100 k ohm resistor to ground. The base also goes through a 200 k ohm resistor to plus 5 volts. The collector of Q2 goes through a 2.2 k ohm resistor to plus 5 volts. The collector of Q2 goes to the upper output terminal. The lower output terminal is grounded. End verbal description.
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