This circuit was fond in an old publication of the years 1950. The transistors are germanium types and equalization is RIAA.
We found this circuit in a 1994 Linear Applications Handbook by National Semiconductor. The LM10...
This is an amplifier for recorder and return containing preamplifier and power amplifier with...
This S-meter circuit was found in a 1976 publication. The circuit is used to measure the signal...