Based on an LM36000 OTA this circuit was found in the July 1988 issue of Radio Electronics magazine. It covers frequencies in the range of 45 Hz to 45 kHz.
The critical component of this amplifier is the output transformer. We found the circuit in an old...
This circuit was found in the January 1989 issue of Radio Electronics magazine. The circuit sends...
This circuit was found in a 1980s documentation. Q1 and Q2 can be BC548 and SCR a TIC106. The...