Explorer for all ranges (T1098E)

This circuit was found in a Radio Craft from October 1946. Power supply not shown, and tubes are 1.5V filament types.

Dual Frequency Oscillator (CB13022E)
The LM567 is a PLL tone decoder that can also be used as a double oscillator as shown in the...
Light pulse analyzer (CB8300E)
Originally designed to analyze the shape of light pulses from a flash for photographic...
Two Power Loads by One Cable Control (CB19044E)
This interesting control circuit was found in an Electronics Now from 1988. Through it we can...