3-tube amplifier (T1716E)

Found in Radio Electronics magazine from 1959, this high-fidelity amplifier has 15 W of power. Power supply was not provided.

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Night Switch (CB491)
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Balanced Microphone Preamplifier I (CB4943E)
This circuit was obtained from an American publication of the 80's. The integrated circuit is of the...
Operational Flip Flop (CB4839E)
In the figure we have a traditional flip-flop configuration implemented with two operational...