3B3: Difference between revisions

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The Tektronix Type 3B3 is sweep unit [[introduced in 1963]], intended for use with the 561A.
{{Plugin Sidebar
It works fine in other 560-series scopes.
|manufacturer=Tektronix
It provides a calibrated delay from 500 nsec to 10 seconds after the trigger event, before
|series=560-series scopes
sweeping.  Delayed sweep allows the operator to "zoom in" on regions of interest in a waveform.
|type=3B3
The 3B3 provides an intensified mode that indicates the selected region of interest in the
|summary=Time Base plug-in
delayed sweep by showing the entire waveform with the trace brighter in the selected region.
|image=Tek 3b3 front.jpeg
Triggering is done using a 2mA germanium tunnel diode.  The trigger source is buffered by
|caption=Tektronix 3B3
a 7895 Nuvistor triode cathode-follower driving a differential amplifier formed by two
|introduced=1962
2N2207 germanium PNP transistors.  The collector current switches the tunnel diode when
|discontinued=(?)
a triggering event occurs.
|manuals=
* [[Media:070-365.pdf                        | Tektronix 3B3 Manual]]
* [[Media:Tek type 3b3 fcp.pdf              | Tektronix Type 3B3 Factory Calibration Procedure]]
* [[Media:Tek 3b3 fcp tentative oct 1962.pdf | Tektronix 3B3 Factory Calibration Procedure, October 1962‎]]
* [[Media:Tek 3b3 fcp may 1966.pdf‎          | Tektronix 3B3 Factory Calibration Procedure, May 1966‎]]
* [[Media:050-0582-00-TEK_3B1-3B3-MOD.pdf    | 050-0582-00 Q114/Q214 Germanium Transistor Replacement]]
}}
The '''Tektronix 3B3''' is a time base [[introduced in 1963]] for [[560-series scopes]].
It works fine in all [[560-series scopes]] other than the [[560]] itself, as well as in the [[129]].


It provides a calibrated delay from 500 ns to 10 s after the trigger event, before sweeping. 
Delayed sweep allows the operator to "zoom in" on regions of interest in a waveform.
The 3B3 provides an intensified mode that indicates the selected region of interest in the delayed sweep by showing the entire waveform with the trace brighter in the selected region.
{{MissingSpecs}}
==Links==
{{Documents|Link=3B3}}
==Internals==
Triggering is done using a [[1N3714]] 2 mA germanium [[tunnel diode]].
The trigger source is buffered by a [[7895]] Nuvistor triode cathode-follower
driving a differential amplifier formed by two [[2N2207]] germanium PNP transistors. 
The collector current switches the tunnel diode when a triggering event occurs. 
Up to serial number 1029, the 3B3 uses Transitron T12G germanium diodes (equivalent to
the [[1N270]]) to protect the transistors of the front-end differential amplifier.
Starting at serial number 1030, silicon diodes were used for that function.
==Pictures==
<gallery>
<gallery>
Image:3b3 front.jpg
3b3 front.jpg
Image:3b3 right.jpg
3b3 right.jpg
Image:3b3 left.jpg
3b3 left.jpg
Tek 3b3 block.png                      | Block Diagram
Tek 3b3 delay pickoff.png              | Delay Pickoff
Tek 3b3 early delayed sweep trigger.png | Delayed Sweep Trigger
Tek 3b3 early delayed sweep.png        | Delayed Sweep
Tek 3b3 delayed sweep timing switch.png | Delayed Sweep Timing Switch
Tek 3b3 mode switch.png                | Mode Switch
Tek 3b3 delay pickoff.png              | Delay Pickoff
Tek 3b3 early normal trigger.png        | Normal Trigger
Tek 3b3 normal sweep timing switch.png  | Normal Sweep Timing Switch
Tek 3b3 horizontal amp.png              | Horizontal Amp
Tek 3b3 11891.jpg
Tek 3b3 11891_2.jpg
Tek 3b3 11891_3.jpg
</gallery>
</gallery>
==Components==
{{Parts|3B3}}
[[Category:560 series plugins]]

Latest revision as of 07:18, 20 March 2024

Tektronix 3B3
Time Base plug-in
Tektronix 3B3

Compatible with 560-series scopes

Produced from 1962 to (?)

Manuals
Manuals – Specifications – Links – Pictures

The Tektronix 3B3 is a time base introduced in 1963 for 560-series scopes. It works fine in all 560-series scopes other than the 560 itself, as well as in the 129.

It provides a calibrated delay from 500 ns to 10 s after the trigger event, before sweeping. Delayed sweep allows the operator to "zoom in" on regions of interest in a waveform.

The 3B3 provides an intensified mode that indicates the selected region of interest in the delayed sweep by showing the entire waveform with the trace brighter in the selected region.

Key Specifications

  • please add

Links

Documents Referencing 3B3

Internals

Triggering is done using a 1N3714 2 mA germanium tunnel diode. The trigger source is buffered by a 7895 Nuvistor triode cathode-follower driving a differential amplifier formed by two 2N2207 germanium PNP transistors. The collector current switches the tunnel diode when a triggering event occurs.

Up to serial number 1029, the 3B3 uses Transitron T12G germanium diodes (equivalent to the 1N270) to protect the transistors of the front-end differential amplifier. Starting at serial number 1030, silicon diodes were used for that function.

Pictures

  • Block Diagram

    Block Diagram

  • Delay Pickoff

    Delay Pickoff

  • Delayed Sweep Trigger

    Delayed Sweep Trigger

  • Delayed Sweep

    Delayed Sweep

  • Delayed Sweep Timing Switch

    Delayed Sweep Timing Switch

  • Mode Switch

    Mode Switch

  • Delay Pickoff

    Delay Pickoff

  • Normal Trigger

    Normal Trigger

  • Normal Sweep Timing Switch

    Normal Sweep Timing Switch

  • Horizontal Amp

    Horizontal Amp

Components

Some Parts Used in the 3B3

Part Part Number(s) Class Description Used in
1N270 152-008 • 152-0008-00 Discrete component 100 V, 40 mA, 0.8 pF Germanium diode 3B3
1N3714 152-0081-00 Discrete component 2.2 mA, 25 pF germanium tunnel diode 546 • 547 • 556 • 21A • 22A • 3B1 • 3B2 • 3B3 • 422 • 491 • 283
1N3716 152-093 • 152-0093-00 Discrete component 4.7 mA / 50 pF tunnel diode 3B3 • R116
2N2207 151-063 • 151-0063-00 Discrete component germanium PNP transistor 3B1 • 3B3 • 3S76 • 321A • 547
6AL5 154-016 • 154-0016-00 • 154-0038-00 Vacuum Tube (Dual Diode) high-perveance dual diode 163 • 181 • 190 • 1M1 • 310 • 310A • 315 • 316 • 317 • 3B1 • 3B1S • 3B2 • 3B3 • 3B5 • 502 • 502A • 503 • 511 • 511A • 512 • 516 • 517 • 517A • 524 • 526 • 535 • 535A • 545 • 545A • 549 • 551 • 565 • 570 • 581 • 581A • 585 • 585A • C • T • Telequipment D56 • Telequipment S52
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 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
7895 154-0378-00 Vacuum Tube (Triode) Nuvistor Triode 3B1 • 3B1S • 3B3
RT5204 151-0058-00 Discrete component Silicon NPN transistor 565 • RM565 • Z • 2A61 • 3B1 • 3B3 • 3S76 • 3T77
TD714 152-0402-00 Discrete component 2.2 mA, 25 pF tunnel diode 1401 • 1401A • 283 • R283 • 3B2 • 3B3 • 422 • 491 • 546 • RM546 • 547 • RM547 • 556 • RM556 • SPG11 • SPG12
ZZ1000 154-370 • 154-0370-00 Gas Discharge Tube (Voltage regulator) 81 V voltage reference 129 • 3B1 • 3B1S • 3B2 • 3B3 • 3S76 • 422 • S-311
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