3B3: Difference between revisions

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The Tektronix Type 3B3 is sweep unit [[introduced in 1963]], intended for use with the [[561|561A]].
{{Plugin Sidebar |
manufacturer=Tektronix |series=560-series scopes |type= 3B3|
summary=Time Base|
image=3b3 front.jpg|
caption=3B3 front view|
introduced=1962 |
discontinued=(?) |
designers= |
manuals=
* [[Media:070-365.pdf|Tektronix 3B3 Manual (PDF)]]
* [http://bama.edebris.com/download/tek/3b3/3b3.djvu Tektronix 3B3 Manual @ BAMA] (DjVu)
* [[Media:Tek type 3b3 fcp no ocr.pdf|Tektronix Type 3B3 Factory Calibration Procedure (PDF, needs OCR)]]
* [[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 Type 3B3''' is sweep unit (time base) [[introduced in 1963]], intended for use with the [[561|561A]].  
It works fine in other [[560-series scopes]].
It works fine in other [[560-series scopes]].
It provides a calibrated delay from 500 nsec to 10 seconds 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.
Triggering is done using a 2mA germanium [[tunnel diodes|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.  The 3B3 uses Transitron T12G germanium diodes, which are equivalent to
the [[1N270]].


* [http://bama.edebris.com/download/tek/3b3/3b3.djvu Tektronix 3B3 Manual (DjVu)]
It provides a calibrated delay from 500 ns to 10 s after the trigger event, before sweeping.
* [http://w140.com/3b3.pdf Tektronix 3B3 Manual (PDF)]
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.
==Specifications==
[[Category:Specifications needed]] ''please add''
==Internals==
Triggering is done using a 2 mA germanium [[tunnel diodes|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>
{{Parts|3B3}}
[[Category:560 series plugins]]

Revision as of 15:29, 10 October 2021

Manuals – Specifications – Links – Pictures

The Tektronix Type 3B3 is sweep unit (time base) introduced in 1963, intended for use with the 561A. It works fine in other 560-series scopes.

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.

Specifications

please add

Internals

Triggering is done using a 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


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