585

The Type 585 is a 100MHz oscilloscope made by Tektronix from the late 1950's through the 1960's. The 585 uses 80-series plug-ins. The Type 81 adapter allows the use of letter-series and 1-series plug-ins in a 585. The 585 has tunnel diode triggering and, like many Tek scopes, a distributed amplifier for vertical deflection. A Type 585A also exists.

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  Front view.

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  Trigger circuit.

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  Tunnel diode for triggering.

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  Inside view shows regulator tubes.

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  Distributed vertical amplifier.