3B4: Difference between revisions

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The Tektronix Type 3B4 is a timebase plug-in for 560-series scopes.  It was introduced in 1964.
{{Plugin Sidebar
It was intended primarily for use
| manufacturer=Tektronix
with the 561A, but works fine in other 560-series scopes. The 3B4 is unusual in having an explicit
| series=560-series scopes
"FREE RUN" mode.  In the triggered modes, the tunnel diode-based triggering is rated to work to 20MHz.
| type=3B4
The vertical bandwidth of typical 560-series (non-sampling) scopes is about 10MHz, so 20MHz is adequate.
| summary=Timebase plug-in
Triggering is done with a TD3A 4.7mA tunnel diode. The trigger input is amplified and buffered by a
| designers=
6DJ8-based differential amplifier driving a common-emitter 2N964 germanium PNP transistor whose  
| image=3b4_front.jpg
collector current switches the tunnel diode.
| caption=3B4 Front View
| introduced=1964
| discontinued=(?)
| manuals=
* [[Media:070-431.pdf|Tektronix 3B4 Manual]] (OCR)
* [[Media:Tek 3b4 fcp jan 1969.pdf‎|Tektronix 3B4 Factory Calibration Procedure, January 1969]]
* [[Media:Tek 3b4 fcp june 1967.pdf|Tektronix 3B4 Factory Calibration Procedure, June 1967]]
}}
The '''Tektronix Type 3B4''' is a timebase plug-in for [[560-series scopes]], introduced in 1964.
 
It was intended primarily for use with the [[561A]], but works fine in other 560-series scopes.
The 3B4 is unusual in having an explicit "FREE RUN" mode.   
 
In the triggered modes, the [[tunnel diodes|tunnel diode]]-based triggering is rated to work to 20 MHz.
The vertical bandwidth of typical 560-series (non-sampling) scopes is about 10 MHz, so 20 MHz is adequate.
 
{{MissingSpecs}}
 
==Links==
* [http://www.barrytech.com/tektronix/vintage/tek3b4.html Tek 3B4 @ barrytech.com]
{{Documents|Link=3B4}}
 
==Internals==
Triggering is done with a [[TD3A]]/1N3717 4.7 mA tunnel diode.
The trigger input is amplified and buffered by a [[6DJ8]]-based differential amplifier driving a common-emitter
[[2N964]] germanium PNP transistor whose collector current switches the tunnel diode.
 
==Pictures==


<gallery>
<gallery>
Image:3b4_front.jpg|front view
3b4_front.jpg| Front View
Image:3b4_left.jpg|left side view
3b4_left.jpg | Left Side View
Image:3b4_right.jpg|right side view
3b4_right.jpg| Right Side View
Image:3b4_top.jpg|top view
3b4_top.jpg | Top View
</gallery>
</gallery>
==Components==
{{Parts|3B4}}
[[Category:560 series plugins]]

Latest revision as of 16:59, 7 December 2023

Tektronix 3B4
Timebase plug-in
3B4 Front View

Compatible with 560-series scopes

Produced from 1964 to (?)

Manuals
Manuals – Specifications – Links – Pictures

The Tektronix Type 3B4 is a timebase plug-in for 560-series scopes, introduced in 1964.

It was intended primarily for use with the 561A, but works fine in other 560-series scopes. The 3B4 is unusual in having an explicit "FREE RUN" mode.

In the triggered modes, the tunnel diode-based triggering is rated to work to 20 MHz. The vertical bandwidth of typical 560-series (non-sampling) scopes is about 10 MHz, so 20 MHz is adequate.

Key Specifications

  • please add

Links

Documents Referencing 3B4

(no results)

Internals

Triggering is done with a TD3A/1N3717 4.7 mA tunnel diode. The trigger input is amplified and buffered by a 6DJ8-based differential amplifier driving a common-emitter 2N964 germanium PNP transistor whose collector current switches the tunnel diode.

Pictures

  • Front View

    Front View

  • Left Side View

    Left Side View

  • Right Side View

    Right Side View

  • Top View

    Top View

Components

Some Parts Used in the 3B4

Part Part Number(s) Class Description Used in
1N3717 152-0381-00 • 152-0125-00 Discrete component 4.7 mA, 25 pF tunnel diode 1L40 • 1S1 • 1S2 • 11B1 • 11B2 • 11B2A • 147A • 1470 • 148 • 21A • 22A • 3B4 • 3B5 • 408 • 432 • 434 • 453 • 453A • 454 • 466 • 491 • 5T3 • 544 • RM544 • 546 • RM546 • 547 • RM547 • 556 • RM556 • 7B70 • 7B71 • 7D11
6BL8 154-0278-00 Vacuum Tube (Triode/Pentode) triode-pentode combo 67 • 2B67 • 3B1 • 3B1S • 3B2 • 3B3 • 3B4 • 503 • 504 • 506 • 516 • 549 • 561 • 561A • 561S • 564 • 565 • 567 • Telequipment D52 • Telequipment D56 • Telequipment S31 • Telequipment S32 • Telequipment S32A • Telequipment S51 • Telequipment S52
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
7119 154-0340-00 Vacuum Tube (Dual Triode) dual triode 067-506 • 067-0532-00 • 191 • 3A3 • 3B4 • 3B5 • 516 • 545B • 549 • 661 • Chemtrix 205
STD704 152-0125-00 Discrete component 4.7 mA tunnel diode 1L40 • 1S1 • 11B1 • 11B2 • 11B2A • 147 • R147 • 147A • R147A • 1470 • 148 • R148 • 148-M • 149 • R149 • 149A • R149A • 21A • 22A • 3B4 • 3B5 • 408 • 432 • 434 • 453 • 453A • 454 • 464 • 465 • 466 • 491 • 5T3 • 544 • RM544 • 546 • RM546 • 547 • RM547 • 556 • RM556 • 7B70 • 7B71 • 7D11
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