We found this good amplifier in a Japanese publication of 1966. Transformers are uncommon nowadays and the power supply is included. Power is a few watts.
This circuit produces 1 kHz square signals using the CMOS IC 4070. The frequency is given by the...
This circuit uses a common multimeter on the voltage scale. The calibration of the scale should be...
This circuit was found in the National component manual which is not currently simple to obtain....