The integrated circuit used in this amplifier is uncommon today, since the project is from the 90s. The power is 24 V, and the gain of the circuit is 40dB. The input resistance is 1 M ohms.
I found this circuit in a documentation about thyristors from the 70s. The circuit uses a diac...
This circuit triggers by choosing the higher of two voltages. The circuit is from a 1964...
The integrated circuit used in this 80's mixer is the LM301A. However the circuit can be used to...