Subwoofer Simulator (CB25130E)

This circuit consists of a bass filter that can be used as a subwoofer in a sound system. The circuit is from a Radio Electronics from May 1988.

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Decade Counter with Nixie Tube (CB20141E)
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Two-Transistor Oscillator (CB1387E )
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Tone Control Preamplifier (CB18561E)
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