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Tektronix 1A6
2 MHz Differential Amplifier
Tektronix 1A6 Differential Amplifier

Compatible with 500-series scopes

Produced from 1967 to 1974

(All manuals in PDF format unless noted otherwise)
Manuals – Specifications – Links – Pictures

The Tektronix Type 1A6 is a low-cost differential plug-in for 500-series scopes.

A replacement for Type D, it senses down to 1 mV/div at 2 MHz bandwidth, with 10,000-to-1 common-mode rejection to 100 kHz and ±15V common-mode range.

Type 1A6 was introduced in 1967 and dropped after 1973. Not as many units were sold as the more sensitive Type 1A7 or the faster Type 1A5.

The 1A6 was designed by technician Vaughn Weidel, based on Type 1A7. The input stage is a matched pair of 8393 Nuvistors, and the front panel is styled like Type 1A5. Unlike Types W and 1A7, Type 1A6 was never converted to FET input.

Key Specifications

Deflection 1 mV/Div to 50 V/Div in 1–2–5 sequence
Input impedance 1 MΩ // 33 pF (either input)
Bandwidth 2 MHz, AC coupling 2 Hz
CMRR 10000:1, DC to 100 kHz, 1mV/Div to 50mV/Div
Signal ranges
Range Common mode dynamic range
1 mV/Div to 50 mV/Div ±15 V
0.1 V/Div to 0.5 V/Div ±150 V
1 V/Div to 50 V/Div ±500 V