3A7: Difference between revisions

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{{Spec|Bandwidth|10 MHz in 10 mV/DIV and above, 8 MHz at 5 mV/Div, 6 MHz at 2 mV/Div, 4 MHz at 1 mV/Div}}
{{Spec|Bandwidth|10 MHz in 10 mV/DIV and above, 8 MHz at 5 mV/Div, 6 MHz at 2 mV/Div, 4 MHz at 1 mV/Div}}
{{Spec | Deflection | 1 mV/Div to 50 mV/Div (1-2-5), variable control up to 125 mV/Div, separate 1-10-100-1000× attenuator, i.e. up to 50(125) V/Div }}
{{Spec | Deflection | 1 mV/Div to 50 mV/Div (1-2-5), variable control up to 125 mV/Div, separate 1-10-100-1000× attenuator, i.e. up to 50(125) V/Div }}
{{Spec | Display modes | A -  V<sub>c</sub>, A - B,  V<sub>c</sub> - B }}
{{Spec | Display modes | A - V<sub>c</sub>, A - B,  V<sub>c</sub> - B }}
{{Spec | Comparison voltage | 0 to ±1.1 V or 0 to ±10 V, 10 coarse steps plus 10-turn pot with mechanical readout }}
{{Spec | Comparison voltage | 0 to ±1.1 V or 0 to ±10 V, 10 coarse steps plus 10-turn pot with mechanical readout }}
{{EndSpecs}}
{{EndSpecs}}

Revision as of 19:31, 3 August 2022

Tektronix 3A7
Differential amplifier
3A7 front view

Compatible with 560-series scopes

Produced from 1965 to 1974

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

The Tektronix 3A7 "Differential Comparator" is a differential amplifier plug-in for 560-series scopes. It provides a precision variable DC source, allowing an input signal to be shifted by a specific voltage offset.

Key Specifications

Bandwidth 10 MHz in 10 mV/DIV and above, 8 MHz at 5 mV/Div, 6 MHz at 2 mV/Div, 4 MHz at 1 mV/Div
Deflection 1 mV/Div to 50 mV/Div (1-2-5), variable control up to 125 mV/Div, separate 1-10-100-1000× attenuator, i.e. up to 50(125) V/Div
Display modes A - Vc, A - B,  Vc - B
Comparison voltage 0 to ±1.1 V or 0 to ±10 V, 10 coarse steps plus 10-turn pot with mechanical readout

Pictures


Some Parts Used in the 3A7

Part Part Number(s) Class Description Used in
6DJ8 154-0187-00 154-0305-00 Vacuum Tube (Dual Triode) dual triode 132 161 310A 316 317 502 502A 503 504 506 515 516 519 526 529 RM529 533 535 536 543 544 545 545A 545B 546 547 549 555 556 561A 561S 564 565 567 581 581A 585 585A 661 1A4 1S1 60 2A60 63 2A63 67 2B67 3A1 3A1S 3A2 3A3 3A6 3A7 72 3A72 75 3A75 4S2 51 3B1 3B1S 3B2 3B3 3B4 3M1 3S76 3T77 3T77A 9A1 9A2 1121 80 81 82 86 B O W Z Telequipment D56 Telequipment S32A Telequipment D52 S-311 Telequipment TD51 Telequipment S52 Telequipment S51 Telequipment Type A TU-4
7586 154-0306-00 Vacuum Tube (Triode) Nuvistor triode M 1A1 1A2 1A5 10A2 10A2A 11B1 11B2A 321 321A 3A1 3A1S 3A3 3A5 3A6 3A7 3A8 3A74 3S76 3T77 3T77A 3B5 4S1 4S2 6R1 6R1A 9A1 9A2 82 86 S-311
8056 154-0417-00 Vacuum Tube (Triode) low-voltage Nuvistor triode 422 502 W 1S1 3A7 3S3 3T4 5T3 10A1
8608 154-0491-00 Vacuum Tube (Pentode) 10-watt power pentode 549 556 3A7