The resistors R1 and R2 consist of 8 220 ohms x 2 W resistors connected in parallel. The dissipation must be higher for high transmitter power. The indicator can be the multimeter.
This circuit was found in a Popular Electronics from the 90's. It consists of the solid-state...
Radio Electronics published this circuit in a 90's edition. The circuit makes use of an uncommon...
Other operational amplifiers from the same family such as MC34002, MC35001, MC34004 and MC35004 can...