Current Booster (CB6973E)

We found this circuit in a Popular Electronics from the 90s. Transistors can be modern equivalents. Observe the high supply voltage.

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Current Regulator (CB13409E)
We found this circuit in a documentation for 1977 American radio amateurs. The LM336 integrated circuit...
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The frequency of this oscillator depends on the coil and the 10 nF capacitor. The circuit is from...
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This circuit can work with the previous one generating signals, that can be decoded by it. The...