Found in a 90s R-E Experimenters Handbook, this circuit amplifies signals from 100 Hz to 3 MHz. The circuit has a gain of approximately 30 dB. Bipolar transistors are general-purpose types.
This circuit is suggested by Motorola, using a 4N26 type coupler and an MC1733 type operational....
The two amplifiers are practically the same, except for the gain. They have the following...
This source only uses passive components (without transistors or integrated circuits) and even so it...