Beginning of the Pleiades IRFS450 single MOSFET audio power amplifier in class A operation (electrons flowing all the time)

 At your risk.

Possibly the first time experimenting with a MOSFET in the Pleiades lab.

I think it is same to IRF450 on a different case.

It is placed on a relatively small heat sink.

In order to check the MOSFET is in order, a digital mulimeter was used at resistance measurmnet. Drain to source resistance reading was infinite.

But when an exhauted 9V battery giving 5.6V was connected from source to gate, the MOSFET had tuned on and Source to Drain resistance was of the order of 0.3 ohms.

Thia condition was preserved even after removing 5.6V to gate. Gate keeps the charge.

Promising. I am curious how will it sound with an output transformer driving the Marzntz Imperial 5-G loudspeaker, MOSFET driven by the SONY D-EJ758CK line out.