High Gain Amplifier (T137E)

This high gain amplifier stage uses a pentode valve. The circuit is from documentation of the 50's. The drained current is a few tens of milampères.

MW Receiver (CB4616E)
The circuit presented is a simple MW tuner that can be plugged into the input of any audio...
14-Stage Divide-by 16,384 Counter with Oscillator - 4060 (CB184E)
This counter performs the same function as the 4020, but includes an internal oscillator. The...
40 and 80 Minute Timer (CB4538E)
I found this simple circuit an English magazine from 1984. The circuit can be easily assembled by simply...