Transformerless Wideband Switch (CB6457E)

We found this chopper circuit in a 1967 publication. The transistors are of the time, and current equivalents can be used.

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Experimental Oscillator (CB22483E)
The values of the components in this experimental circuit are those of the previous circuit. The...
Electronic Trombone LM3909 IR5634S CB14288E (CB14288E)
The experimental musical instrument with the LM3909 is suggested by National Semiconductor in...
Rectangular Generator 741 (CB14890E)
With the values of the components indicated, the circuit generates a 1 kHz signal. The power...