BCD to multiplexed parallel converter (CB9612E)

This circuit was found in ancient American documentation. The configuration can be implemented with modern equivalent components.

Astable with the Operational LM3900 (CB4511E)
Other series amplifiers such as the MC3301, MC3401 and LM2900 can be used on this circuit. We...
741 Constant Volume Amplifier (CB25832E)
This circuit was found in the March 1995 issue of Electronics Now magazine. The circuit requires a...
Monitor receiver (CIR21944E)
This receiver was found in a documentation by Gernsback from 1960. The circuit uses high impedance...