This 1950s audio amplifier uses output tubes of type 1625 in its output stage. The Class B circuit provides a few watts of power and uses transformers that are not readily available today.
This circuit can be found in a 1970 Motorola documentation. The circuit can be implemented with general...
This circuit generates sinusoidal and cosine signals of 2 kHz given basically by the values of C1...
This circuit of a 1991 PE Hobbyst Handbook allows the brightness of the incandescent lamp to be...