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{{Oscilloscope Sidebar |
{{Oscilloscope Sidebar
title=Tektronix 515|
|manufacturer=Tektronix
summary=15 MHz Tube scope |
|series=
image=515a trace.jpg |
|model=515
caption=Tektronix 515 front |
|summary=15 MHz Tube scope
introduced=1955 |
|image=515a trace.jpg
discontinued=(?) |
|caption=Tektronix 515 front
manuals=
|introduced=1955
* [http://w140.com/mmm/tek-515.pdf Tektronix 515 Manual (PDF)]
|discontinued=(?)
* [http://w140.com/tek_fcp/tek_type_515a_factory_cal_proc.pdf Tektronix 515A Factory Calibration Procedure (PDF)]
|manuals=
* [[Media:070-247.pdf|Tektronix 515 Manual]] (OCR)<br /><small>Alternate: [[Media:TekInstructionManual_515_515A_P31.tif|515/515A (P31)]] (29M TIF) </small>
* 515A Factory Calibration Procedure: [[Media:tek_515a_fcp.pdf|May 1960]] (OCR) / [[Media:Tek 515a fcp dec 1968.pdf | December 1968]]
* [[Media:Tek 515a mod 760a.pdf|Tektronix 515A Mod 760A]]
* [[Media:Tek 515a mod 760c.pdf|Tektronix 515A Mod 760C]]
* [[Media:Tek 515 mod760 eng docs.pdf|Tektronix 515A Mod 760 Engineering Docs]]
* [[Media:Tek 515a mod 101k.pdf|Tektronix 515A Mod 101K]]
* [[Media:040-140.pdf|Tektronix 515 Mod K515-DC1 (DC fan motor)]]
}}
}}
The '''Tektronix 515''' is a 15 MHz single-trace all-tube oscilloscope [[introduced in 1955]].   
The '''Tektronix 515''' is a 15 MHz single-trace all-tube oscilloscope [[introduced in 1955]].   
It does not use plug-ins.
It does not use plug-ins.


A rack-mount version, the RM15 was also sold. There is also a 515A (serial numbers 101 through 1000 are "Type 515", 1001 and upward are "Type 515A").   
A rack-mount version, the RM15 was also sold.
There is also a 515A (serial numbers 101 through 1000 are "Type 515", 1001 and upward are "Type 515A").   


The 515A has a Z-axis input and slightly higher vertical sensitivity than the 515.
The 515A has a Z-axis input and slightly higher vertical sensitivity than the 515.
Line 38: Line 46:


==Internals==
==Internals==
The HV power supply uses three [[5642]] rectifiers to produce +2325 V for the CRT anode
The HV power supply uses three [[5642]] rectifiers to produce +2,325 V for the CRT anode and −1,675 V for the CRT cathode.   
and -1675 V for the CRT cathode.  The LV power supply is linear, using a [[6080]] tube as
The LV power supply is linear, using a [[6080]] tube as the pass tube of the series regulator for +300 V and +100 V supply.   
the pass tube of the series regulator for +300 V and +100 V supply.  The -150 V supply is  
The −150 V supply is regulated by a [[6AU5]] tube.  The voltage reference for the −150 V supply is a [[5651]] tube.   
regulated by a [[6AU5]] tube.  The voltage reference for the -150 V supply is a [[5651]]
 
tube.  The 515 and 515A use [[selenium rectifiers]].  A kit was later made available
The 515 and 515A use [[selenium rectifiers]].  A kit was later made available for converting them to silicon rectifiers for improved reliability.   
for converting them to silicon rectifiers for improved reliability.   
Starting at serial number 4424, the 515A used the [[120-142]] power transformer, the same part that is used in the [[516]].


The vertical amplifier is fully differential, DC-coupled, and all tube.  The stages are as follows:
The vertical amplifier is fully differential, DC-coupled, and all tube.  The stages are as follows:
Line 88: Line 96:
Tek rm15 right controls.jpg|RM15
Tek rm15 right controls.jpg|RM15
Tek rm15 rear.jpg|RM15 rear
Tek rm15 rear.jpg|RM15 rear
Tek 515a cal trace.jpg|515A
Tek 515a 34.jpg|515A
Blue tek 515a.jpg|Blue 515A
</gallery>
</gallery>


==Components==
{{Parts|515}}
{{Parts|515A}}


[[Category:Monolithic tube scopes]]
[[Category:Monolithic tube scopes]]

Revision as of 16:21, 9 March 2024

Tektronix 515
15 MHz Tube scope
Tektronix 515 front

Produced from 1955 to (?)

Manuals
Manuals – Specifications – Links – Pictures

The Tektronix 515 is a 15 MHz single-trace all-tube oscilloscope introduced in 1955. It does not use plug-ins.

A rack-mount version, the RM15 was also sold. There is also a 515A (serial numbers 101 through 1000 are "Type 515", 1001 and upward are "Type 515A").

The 515A has a Z-axis input and slightly higher vertical sensitivity than the 515. Maximum vertical sensitivity is 100 mV/Div for the 515 and 50 mV/Div for the 515A. The 516 is essentially a dual-trace version of the 515.

The 515 and 515A are fan-cooled, both in benchtop and rackmount forms.

Key Specifications

Channels One vertical channel (two input connectors and a switch to select)
Bandwidth DC to 15 MHz
Rise time 23 ns
Deflection 50 mV/div to 20 V/div (515A), 100 mV/div to 50 V/div (515)
Sweep 0.2 μs/div to 2 s/div
CRT T55 CRT CRT, P31 phosphor standard, 6 cm linear vertical deflection
Input impedance 1 MΩ // 30 pF
Power consumption 275 W
Weight 40 pounds (18 kg)

Links

Internals

The HV power supply uses three 5642 rectifiers to produce +2,325 V for the CRT anode and −1,675 V for the CRT cathode. The LV power supply is linear, using a 6080 tube as the pass tube of the series regulator for +300 V and +100 V supply. The −150 V supply is regulated by a 6AU5 tube. The voltage reference for the −150 V supply is a 5651 tube.

The 515 and 515A use selenium rectifiers. A kit was later made available for converting them to silicon rectifiers for improved reliability. Starting at serial number 4424, the 515A used the 120-142 power transformer, the same part that is used in the 516.

The vertical amplifier is fully differential, DC-coupled, and all tube. The stages are as follows:

  • input buffer, cathode followers, 6AU6
  • first gain stage, differential amplifier, T-coil, 12BY7
  • unity gain buffer, cathode follower, 6DJ8
  • output amplifier, differential amplifier, T-coil, 6CL6

The horizontal amplifier uses half of a 6DJ8 as a buffer, followed by a 6DJ8 as a differential amplifier and phase splitter, followed by the two halves of another 6DJ8 as the output cathode followers driving the horizontal CRT deflection plates.

The trigger is a 6DJ8 differential trigger amplifier followed by a 6DJ8 Schmitt trigger.

Pictures

  • RM15 front view

    RM15 front view

  • RM15 side view

    RM15 side view

  • Vertical signal path

    Vertical signal path

  • RM15 top view

    RM15 top view

  • RM15 bottom view

    RM15 bottom view

  • 515A

    515A

  • 515A

    515A

  • 515A

    515A

  • 515A Left internal view

    515A Left internal view

  • 515A CRT circuit

    515A CRT circuit

  • 515A HV power supply

    515A HV power supply

  • 515A HV power supply

    515A HV power supply

  • 515A HV power supply

    515A HV power supply

  • 515A

    515A

  • 515A left internal

    515A left internal

  • 515A right internal

    515A right internal

  • 515A S1

    515A S1

  • 515A S1

    515A S1

  • 515A S1

    515A S1

  • 515A S1

    515A S1

  • 515A S1

    515A S1

  • RM15

    RM15

  • RM15

    RM15

  • RM15

    RM15

  • RM15

    RM15

  • RM15 rear

    RM15 rear

  • 515A

    515A

  • 515A

    515A

  • Blue 515A

    Blue 515A

Components

Some Parts Used in the 515

Part Part Number(s) Class Description Used in
120-0080-00 120-0080-00 Discrete component power transformer 515
5642 154-0051-00 • 154-0079-00 Vacuum Tube (Diode) directly-heated high-voltage rectifier 310 • 310A • 316 • 317 • 360 • 453 • 502 • 502A • 503 • 504 • 506 • 513 • 515 • 516 • 524 • 529 • RM529 • 533 • 533A • 535 • 536 • 543 • 543A • 543B • 545 • 545A • 545B • 547 • 551 • 555 • 556 • 560 • 561 • 561A • 561S • 564 • 567 • 570 • 575 • 581 • 581A • 585 • 585A • 647 • 647A
6CL6 154-031 • 154-0031-00 • 154-0286-00 Vacuum Tube (Pentode) 7.5 W power pentode 132 • 310 • 310A • 316 • 317 • 515 • 524 • 525 • 531 • 535 • 535A • 545 • 545A • 545B • 549 • 570 • 581 • 581A • 585 • 585A • 3A74
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
T0550 154-344 • 154-0344-00 CRT CRT 515 • 515A • 516
T55 154-0344-00 CRT CRT 515 • 515A • 516


Some Parts Used in the 515A

Part Part Number(s) Class Description Used in
120-142 120-142 Discrete component power transformer 515A • 516
154-0764-00 154-0764-00 • 154-0764-03 • 154-0764-04 CRT CRT 515A • RM15 • 516
T0550 154-344 • 154-0344-00 CRT CRT 515 • 515A • 516
T55 154-0344-00 CRT CRT 515 • 515A • 516
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