422

The Tektronix Type 422 is a 15 MHz portable dual-trace oscilloscope. It was available with an optional battery back for operation without mains power. Early versions use an 8056 Nuvistor tube for the front-end cathode follower. Later versions use a FET front end. The 422 uses tunnel diodes from triggering. The post-deflection acceleration voltage is 4900 Volts.

Tektronix 422 Manual (PDF)

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  Trigger circuit

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  Sweep circuit

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  Vertical amplifier circuit

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  Input amplifier circuit

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  Horizontal amplifier circuit

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  CRT circuit