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{{Oscilloscope Sidebar | | {{Oscilloscope Sidebar | ||
|manufacturer=Tektronix | |||
summary=TV waveform monitoring scope | | |series= | ||
image=Tek 524 trace.jpg | | |model=524AD | ||
caption=Tektronix 524AD | | |summary=TV waveform monitoring scope | ||
introduced=1953 | | |image=Tek 524 trace.jpg | ||
discontinued=(?) | | |caption=Tektronix 524AD | ||
manuals= | |introduced=1953 | ||
* [[Media:Tek_524AD_OCRed.pdf|524AD Instruction Manual]] ( | |discontinued=(?) | ||
|designers=Cliff Moulton | |||
|manuals= | |||
* [[Media:070-236.pdf|524AD Instruction Manual 070-236]] | |||
* [[Media:Tek_524AD_OCRed.pdf|524AD Instruction Manual]] (OCR) | |||
* [[Media:Tek 524 cal procedure.pdf|524 Calibration Procedure]] | |||
* [[Media:Tek 524 calibration checklist.pdf|524 Calibration Checklist]] | |||
}} | }} | ||
The '''Tektronix 524AD''' is a monolithic oscilloscope [[introduced in 1953]] for monitoring television waveforms, designed by [[Cliff Moulton]]. | The '''Tektronix 524AD''' is a monolithic oscilloscope [[introduced in 1953]] for monitoring television waveforms, designed by [[Cliff Moulton]]. | ||
In a 1972 interview, [[Charlie Rhodes]] recalled: | |||
<blockquote> | |||
In 1953 Cliff Moulton re-designed the [[514]] for TV station needs. | |||
This became the 524, the first TV-oriented instrument. | |||
It looked like a market of 200 or so in those days, but wound up producing 10,000 of this model. | |||
</blockquote> | |||
Interestingly, the 524 appears on page 31 of the [[Media:RCA-Test-Equip-1966.pdf|1966 RCA Test Equipment Catalog]]. | |||
{{BeginSpecs}} | |||
power supply. | {{Spec | Bandwidth | DC to 10 MHz @ ≥150 mV/div; with preamp, 2 Hz to 10 MHz down to 15 mV/div }} | ||
{{Spec | Rise time | 40 ns }} | |||
{{Spec | Deflection | variable from 15 mV/div to 50 V/div }} | |||
{{Spec | Input | 1 MΩ // 45 pF; 10 MΩ // 15 pF with [[P510A]] ×10 probe }} | |||
{{Spec | Sweep | 100 ns/div to 10 ms/div, ×3 and ×10 magnifier }} | |||
{{Spec | Time markers | 1 μs, 100 ns, 50 ns, 318 ns, 1.59 μs (200 or 40 markers per TV line) }} | |||
{{Spec | CRT | [[5ABP1]] (P1 [[phosphor]]) standard, P7 and P11 optional; 4 kV total acceleration (−1.5 kV/+2.5 kV) }} | |||
{{Spec | Power | 500 W }} | |||
{{Spec | Weight | 27.7 kg / 61 lbs }} | |||
{{EndSpecs}} | |||
It uses [[selenium rectifiers]] in the low-voltage power supply. | |||
The 524AD has a 56°C/133°F [[thermal cutoff]]. | |||
==Links== | ==Links== | ||
Line 27: | Line 48: | ||
The vertical signal path of the 524 is similar to that of the [[514]]. | The vertical signal path of the 524 is similar to that of the [[514]]. | ||
They have similar front-ends and similar [[distributed amplifier|distributed vertical output amplifiers]]. | They have similar front-ends and similar [[distributed amplifier|distributed vertical output amplifiers]]. | ||
The vertical amplifier has a three-stage [[distributed amplifier]] section (6×[[6AG7]]). | |||
The video trigger circuitry present in the 524 distinguish it from the 514. | The video trigger circuitry present in the 524 distinguish it from the 514. | ||
Just before the L-C [[delay line]] in the vertical signal path, there is a | Just before the L-C [[delay line]] in the vertical signal path, there is a cathode follower, V15A, that serves as the trigger pickoff buffer. | ||
cathode follower, V15A, that serves as the trigger pickoff buffer. | |||
The resulting trigger signal goes to a video sync separator circuit. | The resulting trigger signal goes to a video sync separator circuit. | ||
Here, the there is clamping and amplification and, | Here, the there is clamping and amplification and, most importantly, a non-retriggerable multivibrator. | ||
most importantly, a non-retriggerable multivibrator. | |||
The multivibrator is triggered by the vertical sync of the NTSC waveform. | The multivibrator is triggered by the vertical sync of the NTSC waveform. | ||
After being triggered, it is not triggerable again for about about 25 ms, so it | After being triggered, it is not triggerable again for about about 25 ms, so it misses the vertical sync of the next interlaced field and instead triggers on the vertical sync of one following that. | ||
misses the vertical sync of the next interlaced field and instead triggers on | So it consistently shows the "even" field or the "odd" field. | ||
the vertical sync of one following that. So it consistently shows the "even" field | There is a switch that perturbs the multivibrator so it can be switched between even and odd fields. | ||
or the "odd" field. There is a switch that perturbs the multivibrator so it can be | The video trigger circuit drives a conventional trigger circuit and sweep circuit similar to that of the 514. | ||
switched between even and odd fields. The video trigger circuit drives a | |||
conventional trigger circuit and sweep circuit similar to that of the 514. | |||
The 524 uses a cylindrical style of ceramic terminal strip, which is less common than the straight style. | The 524 uses a cylindrical style of [[ceramic strips|ceramic terminal strip]], which is less common than the straight style. | ||
The cylindrical style is also used in the [[C|Type C]], [[CA|Type CA]], and [[315]]. | The cylindrical style is also used in the [[C|Type C]], [[CA|Type CA]], and [[315]]. | ||
==Pictures== | ==Pictures== | ||
Line 78: | Line 95: | ||
Tek early 524ad 9.jpg | Tek early 524ad 9.jpg | ||
</gallery> | </gallery> | ||
==Components== | |||
{{Parts|524}} | |||
[[Category:Monolithic tube scopes]] | [[Category:Monolithic tube scopes]] | ||
[[Category:TV waveform monitors]] | [[Category:TV waveform monitors]] |
Latest revision as of 16:46, 8 December 2023
The Tektronix 524AD is a monolithic oscilloscope introduced in 1953 for monitoring television waveforms, designed by Cliff Moulton.
In a 1972 interview, Charlie Rhodes recalled:
In 1953 Cliff Moulton re-designed the 514 for TV station needs. This became the 524, the first TV-oriented instrument. It looked like a market of 200 or so in those days, but wound up producing 10,000 of this model.
Interestingly, the 524 appears on page 31 of the 1966 RCA Test Equipment Catalog.
Key Specifications
Bandwidth | DC to 10 MHz @ ≥150 mV/div; with preamp, 2 Hz to 10 MHz down to 15 mV/div |
---|---|
Rise time | 40 ns |
Deflection | variable from 15 mV/div to 50 V/div |
Input | 1 MΩ // 45 pF; 10 MΩ // 15 pF with P510A ×10 probe |
Sweep | 100 ns/div to 10 ms/div, ×3 and ×10 magnifier |
Time markers | 1 μs, 100 ns, 50 ns, 318 ns, 1.59 μs (200 or 40 markers per TV line) |
CRT | 5ABP1 (P1 phosphor) standard, P7 and P11 optional; 4 kV total acceleration (−1.5 kV/+2.5 kV) |
Power | 500 W |
Weight | 27.7 kg / 61 lbs |
It uses selenium rectifiers in the low-voltage power supply.
The 524AD has a 56°C/133°F thermal cutoff.
Links
Internals
The vertical signal path of the 524 is similar to that of the 514. They have similar front-ends and similar distributed vertical output amplifiers.
The vertical amplifier has a three-stage distributed amplifier section (6×6AG7).
The video trigger circuitry present in the 524 distinguish it from the 514. Just before the L-C delay line in the vertical signal path, there is a cathode follower, V15A, that serves as the trigger pickoff buffer. The resulting trigger signal goes to a video sync separator circuit. Here, the there is clamping and amplification and, most importantly, a non-retriggerable multivibrator. The multivibrator is triggered by the vertical sync of the NTSC waveform. After being triggered, it is not triggerable again for about about 25 ms, so it misses the vertical sync of the next interlaced field and instead triggers on the vertical sync of one following that. So it consistently shows the "even" field or the "odd" field. There is a switch that perturbs the multivibrator so it can be switched between even and odd fields. The video trigger circuit drives a conventional trigger circuit and sweep circuit similar to that of the 514.
The 524 uses a cylindrical style of ceramic terminal strip, which is less common than the straight style. The cylindrical style is also used in the Type C, Type CA, and 315.
Pictures
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Displaying a squarewave
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Marker switch
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Unusual round terminal strips in the 524
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Top right internal view
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Selenium rectifier and unusual fan mount
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Time Mark Gen for 524
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Sync Separator
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Bottom front, power supply circuitry
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Bottom rear, transformer wiring
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Cartoon in 1960 version of circuit diagrams
Early model
Components
Some Parts Used in the 524
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 |
12AU7 | 154-041 • 154-0041-00 • 154-0287-00 | Vacuum Tube (Dual Triode) | dual medium-μ triode | 104 • 104A • 122 • 160 • 161 • 162 • 181 • 190 • 310 • 310A • 316 • 317 • 3C66 • 502 • 502A • 507 • 511A • 512 • 516 • 517 • 517A • 524 • 526 • 535 • 536 • 545 • 545A • 545B • 547 • 549 • 555 • 561 • 564 • 570 • 575 • 581 • 581A • 585 • 585A • C • D • E • N • Q • Hickok 1825 |
12AX7 | 154-043 • 154-0043-00 | Vacuum Tube (Dual Triode) | dual triode | 3C66 • 513 • 524 • 531 • 531A • 535 • 536 • 545 • 545A • 545B • 546 • 547 • 549 • 555 • 570 • 581 • 581A • 585 • 585A • E • Q • Hickok 1825 • Keithley 610 |
12B4 | 154-044 • 154-0044-00 | Vacuum Tube (Triode) | power triode | 126 • 310 • 310A • 316 • 317 • 502 • 502A • 524 • 526 • 541 • 541A • 535 • 535A • 545 • 545A • 546 • 547 • 570 • 549 • 551 • 555 • 513 • 581 • 581A • 585 • 585A • Keithley 610 |
12BY7A | 154-047 • 154-0047-00 | Vacuum Tube (Pentode) | miniature 6.5 W power pentode | 106 • 163 • 524 • 531 • 533 • 535 • 536 • 541 • 543 • 535 • 545 • 545A • 549 • 555 • 75 • 3A75 • 3B5 |
12BZ7 | 154-048 • 154-0048-00 | Vacuum Tube (Dual Triode) | dual triode | 524 • 570 |
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 |
5651 | 154-052 • 154-0052-00 • 154-0288-00 | Gas Discharge Tube (Voltage regulator) | 87 V voltage reference | 128 • 160 • 310 • 310A • 502 • 503 • 504 • 511A • 512 • 516 • 517 • 524 • 526 • 531 • 531A • 535 • 536 • 541 • 541A • 543 • 543A • 543B • 545 • 545A • 545B • 570 • 549 • 581 • 581A • 585 • 585A |
5ABP | 154-068 • 154-0068-00 • 154-0068-01 • 154-0068-03 • 154-069 • 154-0069-00 • 154-070 • 154-0070-00 • 154-0070-01 | CRT | 5" CRT with electrostatic deflection | 511A • 512 • 524 |
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 |
6AH6 | 154-0013-00 | Vacuum Tube (Dual Triode) | RF pentode | 524 |
6AK5 | 154-0014-00 • 154-0206-00 • 154-0084-00 | Vacuum Tube (Pentode) | RF pentode | B • C • CA • G • K • L • ML • S • Z • 517 • 517A • 524 |
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 |
6AQ5 | 154-017 • 154-0017-00 | Vacuum Tube (Pentode) | beam pentode | 310 • 310A • 316 • 360 • 507 • 511A • 512 • 517 • 517A • 524 • 536 • 570 • 575 |
6AS5 | 154-0018-00 | Vacuum Tube (Pentode) | 5.5 W beam pentode | 517 • 517A • 524 |
6AS7 | 154-020 • 154-0020-00 | Vacuum Tube (Pentode) | dual power triode | 160 • 506 • 511A • 512 • 513 • 517 • 517A • 524 • 561 • 561A • 561S • 564 |
6AU6 | 154-0022-00 • 157-0073-00 • 157-0059-00 • 154-0284-00 | Vacuum Tube (Pentode) | RF pentode | 107 • 160 • 181 • 190 • 60 • 2A60 • 72 • 3A72 • 3C66 • 310 • 310A • 316 • 317 • 360 • 502 • 502A • 506 • 511 • 511A • 512 • 513 • 516 • 517 • 517A • 524 • 526 • 529 • RM529 • 531 • 531A • 535 • 536 • 545 • 545A • 546 • 547 • 549 • 555 • 561 • 561A • 561S • 564 • 565 • 567 • 570 • 575 • 581 • 581A • 585 • 585A • 80 • C • CA • Q |
6BH6 | 154-0026-00 • 154-0285-00 | Vacuum Tube (Pentode) | pentode | 130 • 162 • 310 • 310A • 512 • 517 • 517A • 524 • Nelson-Ross PSA-011 |
6BQ7A | 154-028 • 154-0028-00 • 157-0022-00 • 157-0003-00 | Vacuum Tube (Dual Triode) | dual triode | 107 • 163 • 181 • 310 • 315 • 316 • 360 • 524 • 531 • 532 • 535 • 536 • 541 • 545 • 570 • T |
6BW4 | 154-0119-00 | Vacuum Tube (Dual Diode) | dual diode | 126 • 502 • 502A • 524 • 575 |
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 |
6U8 | 154-0033-00 | Vacuum Tube (Triode/Pentode) | triode-pentode combo | 130 • 160 • 163 • 310 • 315 • 316 • 524 • 535 • 545 • T |