Volume Indicator 6E5 (T905E)

In the figure we have an old volume indicator circuit with a 6E5 magic eye. The circuit is from a 1944 documentation and must be powered with 450 V.

Pulse Generator (CB923E)
Thes astable was found in old publication of 1968. The circuit uses general purpose germanium...
Voltage Controlled Oscillator (CB4022E)
The integrated circuit used in this configuration of the 1990 Motorola Linear Databook is not...
Power Supply with Operational Amplifier 12 V x 500 m (CB1171E)
This circuit was found on a Radio Electronics of July 1984. It consists of a source with the 741...