If you have the skills and can get your hands on SMD components, you can assemble this small amplifier. We found it in the Radio Electronics Experimenter special edition from 1990.
We found this circuit in an old American publication. It can be mounted with TIC106 type SCRs and...
This simple circuit has good gain and can be implemented with any general-purpose transistor. The...
This circuit was obtained from an Application Note from Linear Technology that manufactures the used...