Monochrome TV Pattern generator (CB9421E)

Using an integrated circuit from the time, this circuit was found in Radio Electronics from the 90s. The ZNA234E is an unusual component today.

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Tuned audio oscillator (CB22254E)
This circuit is from a publication from the 50's. Inductive components are critical, and...
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This simple two-transistor circuit used transistors from the 60s, having been found in a...
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