This 1968´s amplifier uses a JFET at the input to increase the impedance. Voltage gain is high, about 3,000 timers. And input impedance is 1 M ohm. The transistor can be replaced by modern types such as the BF245 or MPF102 for the FET.
This 1968´s amplifier uses a JFET at the input to increase the impedance. Voltage gain is high, about 3,000 timers. And input impedance is 1 M ohm. The transistor can be replaced by modern types such as the BF245 or MPF102 for the FET.
