The figure shows how to drive a load up to 300 mA with an LM3900. The transistor can be a BD136. We found this setting in the 1994 National Semiconductor Linear Applications Handbook.
This high-gain digital amplifier uses general-purpose transistors. The supply voltage is logic...
This 1968 Hughes circuit uses period components and operates at 8 Hz. Current equivalent...
This circuit is from the time of the tubes, being indicated to operate with transmitters turning off...