We found this configuration in an early 1977 publication. The PNP transistor may be the BC558 and the NPN or the BD135. The circuit can be powered by 9 to 12 volts. L1 is the primary winding of an output transformer for transistors.
We found this configuration in an early 1977 publication. The PNP transistor may be the BC558 and the NPN or the BD135. The circuit can be powered by 9 to 12 volts. L1 is the primary winding of an output transformer for transistors.
