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Latest

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Circuit Bench

  • High Pass Filter III (CB19680E)

      The components of this filter are calculated using conventional formulas (see mathematics section of...

  • Tunnel Diode Mixer (CB22546E)

      We found this circuit in the Radio Electronics magazine of November 1952. The circuit can be used...

  • 1 kHz VHF Modulator (CB13665E)

      This circuit is from a 1976 amateur radio manual. The transistor can be the BD136 and the...

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