6AC7 Amplifier (T450E)

Obtained in MIT documentation, this 4-stage circuit has high gain for small signals. The power supply sources 150 V.

1 mA current drain (CB8850E)
This circuit was found in 90s Radio Electronics. The transistor can be any general purpose....
Crystal Oscillator (CB1589E )
This circuit uses a voltage comparator and can produce signals up to 20 MHz. The resistors R are...
RF Pulse Generator (CB4132E)
This high frequency pulse generator was found in an old American documentation. The circuit makes use...