7 MHz receiver (CB9335E)

This direct conversion receiver circuit was found in Radio Electronics from the 90s. The integrated circuit is uncommon today.

Delayed Pulse Generator (CB6470E)
This circuit was found in a 1967 documentation. The switch diode is a component of the time and is...
NAND Gate LM3900 (CB5046E)
As in the previous case (CB5045E), we have in the circuit of the figure the use of the polarized...
Pre Amplifier For Crystal Microphone With 741 (CB924E)
The configuration of this circuit was suggested by an old English publication that comes to...