Buffer with MOSFET (CB26318E)

This boost amplifier was found in a Popular Electroniics from the 90s. The circuit operates up to 20 MHz depending on the coils used.

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Self-disconnecting battery charger (CB4975E)
This 12V battery charging circuit automatically shuts off at the end of the charge. The disconnect...
Flying Saucer Sound (CB16274E)
We do not know exactly what sound a flying saucer makes, or if it makes a sound! But this is not...
Regenerative receiver (CB22273E)
This simple 1 transistor circuit was found in an American documentation from the 60's. The...