This circuit is from a 1968 Motorola power circuit manual. The circuit uses transistors of the time. The passing band is 45 Hz to 100 kHz.
Mouser Electronics is providing the MGA-622P8 low noise amplifier for frequencies from 1.5 to 2.7...
This circuit was obtained in a Radio Electronics of the 90s. The circuit uses an integrated circuit...
The critical component of this circuit is the transformar. We found it in an 1980s documentation....