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Tektronix 10A1
Differential amplifier plug-in
Tektronix 10A1

Compatible with 647

Produced from 1965 to (?)

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.

Key Specifications

Bandwidth DC to 45 MHz (35 MHz in maximum sensitivity)
Deflection 1 mV/div to 20 V/div, 1−2−5
Input impedance 1 MΩ // 20 pF
CMRR 20,000:1 below 100 kHz
Comparison voltage −6 V to +6 V ±(0.1% + 5 mV) 0 °C to 40 °C


Documents Referencing 10A1



Some Parts Used in the 10A1

Part Part Number(s) Class Description Used in
8056 154-0417-00 Vacuum Tube (Triode) low-voltage Nuvistor triode 422 502 W 1S1 3A7 3S3 3T4 5T3 10A1