27 MHz Oscillator (CB24983E)

This tunnel diode oscillator was found in July 1986, Radio Electronics magazine. Note the low supply voltage.

Binary to decimal decoder using transistors (CB6588E)
We found this decoder in a 1966 General Electric publication. It makes use of general purpose...
Alternate Action Switch (II) (CB147)
Another alternate action switch that uses a NAND Schmitt Gate [4093 IC] is shown here. The...
High Pass Filter 741 (CB16119E)
This filter operates in the “opposite” way to the previous one (CIR8814), cutting all signals...