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 |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 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== | |||
[[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> | ||
3b3 front.jpg | |||
3b3 right.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
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
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Block Diagram
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Delay Pickoff
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Delayed Sweep Trigger
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Delayed Sweep
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Delayed Sweep Timing Switch
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Mode Switch
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Delay Pickoff
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Normal Trigger
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Normal Sweep Timing Switch
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Horizontal Amp
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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 D52 • 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 | 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 |
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 |