3A72

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Tektronix 3A72
Dual channel amplifier plug-in
Tektronix 3A72

Compatible with 560-series scopes

Produced from 1961 to (?)

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

The Tektronix 3A72 is a two-channel amplifier designed for use in the 560 series oscilloscopes.

Prior to serial number 1420, the 3A72 was called the Type 72. The 3A72 documentation applies to the 72.

Key Specifications

Bandwidth DC to 650 kHz
Deflection 10 mV/div to 20 V/div
Input impedance 1 MΩ // 47 pF

Pictures

Type 72

Components

Some Parts Used in the 3A72

Part Part Number(s) Class Description Used in
6AU6 154-0022-00 157-0073-00 157-0059-00 154-0284-00 Vacuum Tube (Pentode) RF pentode 107 160 181 190 60 2A60 72 3A72 3C66 310 310A 316 317 360 502 502A 506 511 511A 512 513 516 517 517A 524 526 529 RM529 531 531A 535 536 545 545A 546 547 549 555 561 561A 561S 564 565 567 570 575 581 581A 585 585A 80 C CA Q
6BA8 154-0163-00 Vacuum Tube (Triode/Pentode) triode-pentode combo 59 2A61 72 3A72 3A2
6BA8A 154-0163-00 Vacuum Tube (Triode/Pentode) triode-pentode combo 59 3A72 526
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
8425 154-0022-07 Vacuum Tube (Pentode) RF pentode 3A72 310A 317 526 Q