3A1

Template:Plugin Sidebar 2 The Tektronix Type 3A1 is a dual-trace amplifier plug-in introduced in 1962 for 560-series scopes. Bandwidth is 10 MHz (35 ns risetime). The input impedance is 47 pF.

Deflection factor ranges from 10 mV/div to 10 V/div. The input signal passes through compensated attenuators and then into a cathode-follower stage made of two 7586 Nuvistor tubes.

Channel switching in ALTERNATE mode is done using diodes. The output stage that drives the vertical deflection plates of the scope uses a pair of 8233 frame grid power pentode tubes.

Specifications

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Pictures

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  input amplifier schematic