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Tektronix AM502
differential amplifier
Tektronix AM502

Produced from 1974 to (?)

Manuals – Specifications – Links – Pictures

The Tektronix AM502 is a differential amplifier plug-in for the TM500 system.

The differential amplifier design is a variant of the 1A7A circuit, also used with modifications in the 3A9, 7A22, 5A22N, and 5030/5031 (26A2 too?).

Key Specifications

Bandwidth 1 MHz, LF limit switchable DC, 0.1 Hz to 10 kHz in ×10 steps, HF limit switchable 100 Hz to 1 MHz in ×3/×10 steps, AC coupled > 2 Hz
Gain ×1 to ×1000 (÷ 100 mode) / ×100 to ×100,000 in 1–2–5 sequence, variable to min. ×2.5 calibrated setting
Input impedance 1 MΩ // 47 pF (either input)
Input voltage 15 V DC+peak AC up to 5 MHz, 350 V DC+peak AC up to 5 MHz in ÷ 100 mode
Common mode ±5 V, ±50 V in ÷ 100 mode
DC offset ±1 V
Noise typ. 6 nV/√Hz above 1 kHz (Norm mode)
Output voltage ±5 V into ≥250 Ω


Documents Referencing AM502

Document Class Title Authors Year Links
Tekscope 1972 V4 N5 Sep 1972.pdf Article A Practical Approach to Differential Amplifiers and Measurements Fred Beckett 1972
Tekscope 1972 V4 N6 Nov 1972.pdf Article Differential Amplifiers and Measurements, Part 2 Fred Beckett 1972
070-2088-01.pdf Book TM500 Series Rear Interface Data Book 1976



Some Parts Used in the AM502

Part Part Number(s) Class Description Used in
151-1027-00 151-1027-00 Discrete component dual N-channel JFET 5031 3A9 AM502