10A1

Manuals – Specifications – Links – Pictures

The Tektronix 10A1 is a differential amplifier plug-in for 647 scopes. The input amplifier uses 8056 nuvistor triodes for the input cathode followers. The 10A1 is a comparator, meaning that it has a built-in precision variable DC voltage source that can be added or subtracted from the signal voltage.

The 10A1 was designed by Les Larson.

Specifications

• Maximum calibrated sensitivity: 1 mV/div
• Minimum calibrated sensitivity: 20 V/div
• Input impedance: 1 MΩ in parallel with 20 pF
• Frequency response is DC to 45 MHz, except in maximum sensitivity setting, where it is 35 MHz
• CMRR below 100 kHz is 20,000:1
• Maximum input current: less than 1 nA
• Comparison voltage range: -6 V to +6 V
• Comparison voltage accuracy (0 °C to 40 °C): +/- (0.1% + 5 mV)

Pictures

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  Input Amplifier Schematic

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  Attenuator switch drawing

Some Parts Used in the 10A1

Page	Class	Description	Used in
8056	Vacuum Tube (Triode)	low-voltage Nuvistor triode	422 • 502 • W • 1S1 • 3A7 • 3S3 • 3T4 • 5T3 • 10A1