This circuit is from a 1968s Motorola documentation. The load can range from 10 to 100ohm and the transistor supports a modern equivalent such as 2N2222 or BD135.
This amplifier for small cassette tape players was found in an English documentation from 1969. The...
We can use this amplifier with low impedance headphones with good performance. Possible...
Originally, this circuit is from an English magazine, but I found it in Argentina's Radio Chassis...