6SN7 cascode amplifier (T397E)

This stage with two triodes (double triode) was obtained in a publication of modern tube designs. The circuit can be applied to other triode.

DC Motor Control with Direction Change (CB913E)
Up to 0.5 A DC motors can be controlled by this circuit. Direction change is achieved by a logic...
Two Transistor AM Radio (CB1453E )
This experimental circuit is from a 1975s publication. The coil consists of 80 turns of wire AWG...
Common Collector Stage (CB4937E)
This is a typical common collector amplifier step configuration. The transistor can be used...