3A1: Difference between revisions

Revision as of 16:31, 14 July 2023

Tektronix 3A1
Dual trace amplifier plugin Type 3A1 front view Compatible with 560-series scopes Produced from 1962 to 1968 Manuals Tektronix 3A1 Manual 070-343 Tektronix 3A1 Manual 070-0343-01 Tektronix 3A1 Manual (DjVu @ BAMA) Tektronix 3A1 Factory Calibration Procedure, November 1963‎ (All manuals in PDF format unless noted otherwise)

Manuals – Specifications – Links – Pictures

The Tektronix Type 3A1 is a 10 MHz dual-trace amplifier plug-in for 560-series scopes, introduced in 1962.

Key Specifications

Bandwidth	10 MHz
Risetime	35 ns
Deflection	10 mV/div to 10 V/div, 1−2−5 sequence
Input impedance	1 MΩ // 47 pF

Internals

The input signal passes through compensated attenuators and then into a cathode-follower stage made of two 7586 Nuvistor tubes.

Channel switching in ALTERNATE mode is done using diodes. The output stage that drives the vertical deflection plates of the scope uses a pair of 8233 frame grid power pentode tubes.

Pictures

Front view
Right side
Right side
Top view
Bottom view
input amplifier schematic

Some Parts Used in the 3A1

Part	Part Number(s)	Class	Description	Used in
6DJ8	154-0187-00 • 154-0305-00	Vacuum Tube (Dual Triode)	dual triode	067-506 • 111 • 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
8233	154-0361-00	Vacuum Tube (Pentode)	special quality 10 watt pentode	3A1 • 3A1S • 3A5 • 3A6 • 9A1 • 9A2

@@ Line 4: / Line 4: @@
 |type=3A1
 |summary=Dual trace amplifier plugin
-|image=3a1 front2.jpg
+|image=Tek 3a1 front.jpeg
 |caption=Type 3A1 front view
 |introduced=1962