This circuit is from the LM107 manual. This operational is from the 80s, but the configuration is valid for any operational. The formulas give the gain of the circuit.
This single transistor radio without a power supply was found in documentation from the 1960s. The...
T1 and T2 can be BC557 and T3 a TIP32 for lamps up to 3 A. The supply is made by voltage of 12 V...
This circuit is from the time of the tubes, being indicated to operate with transmitters turning off...