The integrated circuit used in this Electronics Now amplifier is not very common today. However, this configuration can be found in commercial equipment of the time.
This circuit can operate in a 100 dB range with signals of up to 100 MHz frequencies. Similar...
Suggested by Radio Electronics from the 90s, this circuit is suitable for NiCAd batteries with a...
This circuit is from Delco Radio found in a 1968’s documentation. The transistors are of the time...