3-tube receiver 2 (T1603E)

Using known tubes, this receiver was found in a Radio Electronics from 1949. The circuit does not include the power supply.

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...