The integrated circuit of this amplifier is not very common today. The output transistors can be TIP31 and TIP32 in heat radiators. The circuit is from the 1977 National Semiconductor Audio Handbook.
This is a field strength meter found in an 80's Hands On. The circuit operates at frequencies up to 500...
This circuit allows you to simulate an analog telephone line for the repair and testing of...
We found this circuit in the Linear Applications Handbook by National Semiconductor. It uses the...