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The Tektronix 514 is a monolithic general-purpose oscilloscope
{{Oscilloscope Sidebar
introduced in 1949 or 1950.
|manufacturer=Tektronix
It was designed by Tektronix engineers Bob Davis and Dick Rhiger.
|series=
Using a three-section distributed [[distributed amplifier]],
|model=514
it provides frequency response from DC to 10MHz. 
|summary=10 MHz scope
Prior to the 514, customers had to choose between an instrument with
|image=Tek 514d front.jpg
10MHz bandwidth (the [[511]]) or an instrument with DC response (the [[512]]).
|caption=Tektronix 514 front
The 514 provides DC response and 10MHz bandwidth. It weighs 60 pounds and
|introduced=1949
consumes 360 watts.  The 514 uses a [[5CPA]] CRT with a total accelerating
|discontinued=1956
voltage of 3000 volts.  The deflection sensitivity of the CRT is approximately
|designers=Dick Rhiger
27V/cm vertical and 32V/cm horizontal.
|manuals=
* [[Media:IM-514D.pdf|Tektronix 514D Manual]]
* [[Media:Tek 514 history parts list.pdf|Tektronix 514 History Parts List]]
}}
The '''Tektronix 514''' is a monolithic general-purpose oscilloscope introduced in 1949 or 1950.


The power supply is regulated based on a -140V reference produced by a [[OD3]]
It was designed by Tektronix engineers [[Bob Davis]] and [[Dick Rhiger]].
gas regulator tube.


A 514D model exists, which has a 24-section 250ns lumped L-C [[delay line]].   
Using a three-section [[distributed amplifier]], it provides frequency response from DC to 10 MHz.
There is also a 514AD.  How does the 514AD differ from the 514D?
Prior to the 514, customers had to choose between an instrument with 5 Hz to 10 MHz bandwidth (the [[511]])
''or'' an instrument with DC–2 MHz response (the [[512]]). The 514 provides DC response ''and'' 10 MHz bandwidth. 
 
Throughout its production run, a 'D' variant was available (514D, with the 'D' being stamped in by hand
on some models), which has a 24-section 250 ns lumped L-C [[delay line]].   
There was also an 'A' version (514-A & 514-AD respectively), which appears to have been available in 1954.
''(There were also some models marked 'Series A', which may have been a predecessor to the 514A? How does the 514AD differ from the 514D?)''


It has no [[thermal cutoff]].
It has no [[thermal cutoff]].


* [http://bama.edebris.com/download/tek/514d/Tek%20514D%20Series%20A%20Manual.pdf Tektronix 514D Manual (PDF)]
{{BeginSpecs}}
{{Spec | Frequency response | DC to 10 MHz }}
{{Spec | Input impedance | 1 MΩ // 30 pF }}
{{Spec | Vertical deflection | 100 V/cm down to 300 mV/cm (DC) / 30 mV/cm (AC), 1–3–10 sequence}}
{{Spec | Weight | 28.1 kg (62 pounds) }}
{{Spec | Power consumption | 375 W }}
{{EndSpecs}}
 
==Internals==
The 514 uses a [[5CPA]] CRT with a total accelerating voltage of 3 kV (−1.5 kV on the CRT cathode and +1.5 kV on the CRT anode).
The standard [[phosphor]] for a 514 was P1.
The deflection sensitivity of the CRT is approximately 27 V/cm vertical and 32 V/cm horizontal.
 
The power supply is regulated based on a −140 V reference produced by an [[OD3]] gas regulator tube.
The +225 V supply uses three [[5V4G]] rectifier tubes in parallel.
 
==Links==
* [https://paulcarbone.com/blog/?p=909 Paul's research on models, variants, and years available]
* [[Media:Tektronix Photo Manual 1952.pdf| Tektronix Photo Manual 1952]]
 
==Pictures==


'''514'''
<gallery>
<gallery>
File:Tek 514d front.jpg|Front
Tek 514d front.jpg               | Front
File:Tek 514d dist amp.jpg|Distributed vertical amp
Tek 514 with bk curve tracer.jpg | 514AD with B&K Curve Tracer
File:Tek 514d delay trimmers.jpg|Delay line trimmer caps  
Tek 514d dist amp.jpg             | Distributed vertical amp
File:Tek 514d bottom.jpg|Bottom view
Tek 514d delay trimmers.jpg       | Delay line trimmer caps  
Image:Tek 514d-vert schem2.png|Vertical amp schematic
Tek 514d bottom.jpg               | Bottom view
Tek514-PowerSupply.jpg            | Power Supply
Tek514-upperDeckRear.jpg          | Upper Deck, rear
Tek514-upperDeckFront.jpg        | Upper Deck, front
Tek514-lowerDeckFront.jpg        | Lower Deck, front
Tek514-lowerDeckRear.jpg          | Lower Deck, rear
Tek514-fanMotor.jpg              | Fan Motor
Tek514-lineSocket.jpg            | Line Socket
Tek 514d-vert schem2.png         | Vertical amp schematic
Tek_514_Vertical_preamp_early.jpg | Vertical preamp, early
Tek_514_HV_PS_early.jpg          | HV Power Supply, early
</gallery>
</gallery>
'''514AD'''
<gallery>
Tek 514ad 5535 1.jpg
Tek 514ad 5535 2.jpg
Tek 514ad 5535 3.jpg
Tek 514ad 5535 4.jpg
Tek 514ad 5535 5.jpg
Tek 514ad 5535 6.jpg
Tek 514ad 5535 7.jpg
Tek 514ad 5535 8.jpg
Tek 514ad 5535 9.jpg
Tek 514ad 5535 10.jpg
</gallery>
==Components==
{{Parts|514}}
{{Parts|514D}}
{{Parts|514A}}
{{Parts|514AD}}
[[Category:Monolithic tube scopes]]

Latest revision as of 19:13, 16 March 2024

Tektronix 514
10 MHz scope
Tektronix 514 front

Produced from 1949 to 1956

Manuals
(All manuals in PDF format unless noted otherwise)
Manuals – Specifications – Links – Pictures

The Tektronix 514 is a monolithic general-purpose oscilloscope introduced in 1949 or 1950.

It was designed by Tektronix engineers Bob Davis and Dick Rhiger.

Using a three-section distributed amplifier, it provides frequency response from DC to 10 MHz. Prior to the 514, customers had to choose between an instrument with 5 Hz to 10 MHz bandwidth (the 511) or an instrument with DC–2 MHz response (the 512). The 514 provides DC response and 10 MHz bandwidth.

Throughout its production run, a 'D' variant was available (514D, with the 'D' being stamped in by hand on some models), which has a 24-section 250 ns lumped L-C delay line. There was also an 'A' version (514-A & 514-AD respectively), which appears to have been available in 1954. (There were also some models marked 'Series A', which may have been a predecessor to the 514A? How does the 514AD differ from the 514D?)

It has no thermal cutoff.

Key Specifications

Frequency response DC to 10 MHz
Input impedance 1 MΩ // 30 pF
Vertical deflection 100 V/cm down to 300 mV/cm (DC) / 30 mV/cm (AC), 1–3–10 sequence
Weight 28.1 kg (62 pounds)
Power consumption 375 W

Internals

The 514 uses a 5CPA CRT with a total accelerating voltage of 3 kV (−1.5 kV on the CRT cathode and +1.5 kV on the CRT anode). The standard phosphor for a 514 was P1. The deflection sensitivity of the CRT is approximately 27 V/cm vertical and 32 V/cm horizontal.

The power supply is regulated based on a −140 V reference produced by an OD3 gas regulator tube. The +225 V supply uses three 5V4G rectifier tubes in parallel.

Links

Pictures

514

  • Front

    Front

  • 514AD with B&K Curve Tracer

    514AD with B&K Curve Tracer

  • Distributed vertical amp

    Distributed vertical amp

  • Delay line trimmer caps

    Delay line trimmer caps

  • Bottom view

    Bottom view

  • Power Supply

    Power Supply

  • Upper Deck, rear

    Upper Deck, rear

  • Upper Deck, front

    Upper Deck, front

  • Lower Deck, front

    Lower Deck, front

  • Lower Deck, rear

    Lower Deck, rear

  • Fan Motor

    Fan Motor

  • Line Socket

    Line Socket

  • Vertical amp schematic

    Vertical amp schematic

  • Vertical preamp, early

    Vertical preamp, early

  • HV Power Supply, early

    HV Power Supply, early

514AD

Components

Some Parts Used in the 514

Part Part Number(s) Class Description Used in
0D3 154-003 • 154-0003-00 Gas Discharge Tube (Voltage regulator) 153 V voltage reference 511 • 511A • 513 • 514
12AT7 154-0039-00 Vacuum Tube (Dual Triode) dual high-gain triode 161 • 180 • 310 • 310A • 315 • 316 • 360 • 502 • 502A • 511A • 512 • 513 • 513D • 514 • 514AD • 514D • 516 • 524 • 529 • RM529 • 544 • 546 • 547 • 556 • 565 • 570 • 3A2 • 75 • 3A75 • 1M1 • A • B • C • G • H • K • L • ML • M • N • K • R • S • Z • Keithley 610B
5CPA 154-0063-00 CRT 5" CRT with electrostatic deflection 512 • 514
5V4G 154-008 • 154-0008-00 Vacuum Tube (Dual Rectifier) dual rectifier 104 • 104A • 160 • 511A • 514
6AG7 154-012 • 154-0012-00 Vacuum Tube (Pentode) 9 Watt power pentode 104 • 104A • 105 • 112 • 511 • 511A • 512 • 513 • 514 • 517 • 517A • 524
6DK6 154-0149-00 • 154-0367-00 Vacuum Tube (Pentode) high-frequency miniature pentode 180 • 503 • 513 • 514 • 541 • 543 • 535 • 545 • 545A • 551 • 555


Some Parts Used in the 514D

Part Part Number(s) Class Description Used in
12AT7 154-0039-00 Vacuum Tube (Dual Triode) dual high-gain triode 161 • 180 • 310 • 310A • 315 • 316 • 360 • 502 • 502A • 511A • 512 • 513 • 513D • 514 • 514AD • 514D • 516 • 524 • 529 • RM529 • 544 • 546 • 547 • 556 • 565 • 570 • 3A2 • 75 • 3A75 • 1M1 • A • B • C • G • H • K • L • ML • M • N • K • R • S • Z • Keithley 610B


Some Parts Used in the 514A

(no results)


Some Parts Used in the 514AD

Part Part Number(s) Class Description Used in
12AT7 154-0039-00 Vacuum Tube (Dual Triode) dual high-gain triode 161 • 180 • 310 • 310A • 315 • 316 • 360 • 502 • 502A • 511A • 512 • 513 • 513D • 514 • 514AD • 514D • 516 • 524 • 529 • RM529 • 544 • 546 • 547 • 556 • 565 • 570 • 3A2 • 75 • 3A75 • 1M1 • A • B • C • G • H • K • L • ML • M • N • K • R • S • Z • Keithley 610B
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