520: Difference between revisions

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|introduced=1967
|introduced=1967
|discontinued=(?)
|discontinued=(?)
|designers=
|designers=Phil Crosby;Ron Olson
|manuals=
|manuals=
* [[Media:070-0639-02.pdf|Tektronix 520 Manual]]
* [[Media:070-0639-02.pdf|Tektronix 520 Manual]]
* [[Media:070-1709-00.pdf|Tektronix 520A Manual]]
* [[Media:070-1709-00.pdf|Tektronix 520A Manual]]
* [[Media:Tek 520 pal fcp sept 1968.pdf | Tektronix 520 PAL Factory Calibration Procedure, September 1968 (PDF, needs OCR)]]
* [[Media:Tek 520 pal fcp sept 1968.pdf | Tektronix 520 PAL Factory Calibration Procedure, September 1968]] (needs OCR)
* [https://w140.com/tek_520_cat.pdf Tektronix 520 Entry in 1968 Catalog (PDF)]
* [https://w140.com/tek_520_cat.pdf Tektronix 520 Entry in 1968 Catalog]
}}
}}
The '''Tektronix 520''' is a vectorscope [[introduced in 1967]].
The '''Tektronix 520''' is a vectorscope [[introduced in 1967]]. Versions were made for NTSC and for PAL.
Versions were made for NTSC and for PAL.
 
[[Phil Crosby]] was the project lead and designed the demodulation circuitry.
[[Phil Crosby]] was the project lead and designed the demodulation circuitry. [[Ron Olson]] designed the sweep.
[[Ron Olson]] designed the sweep.
 
The HV oscillator's power transistor is mounted to the rear panel.
Since its collector has 40 kHz with tens of volts peak-to-peak a decision was made to add metal plating to the transistor's Bakelite cover to prevent EMI.
Unexpectedly, the outgassing from the Bakelite caused the metal plating to blister, which shorted the collector to the case.
When this problem was discovered, the metal plating was removed from the design. In hindsight, the designers didn't believe the plating was necessary in the first place.


{{MissingSpecs}}
{{MissingSpecs}}
==Pictures==
==Pictures==


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</gallery>
</gallery>


{{Parts|520}}
   
   


[[Category:TV vectorscopes]]
[[Category:TV vectorscopes]]

Revision as of 11:42, 10 July 2022

Tektronix 520
NTSC/PAL vectorscope
520A vectorscope

Produced from 1967 to (?)

Manuals
Manuals – Specifications – Links – Pictures

The Tektronix 520 is a vectorscope introduced in 1967. Versions were made for NTSC and for PAL.

Phil Crosby was the project lead and designed the demodulation circuitry. Ron Olson designed the sweep.

The HV oscillator's power transistor is mounted to the rear panel. Since its collector has 40 kHz with tens of volts peak-to-peak a decision was made to add metal plating to the transistor's Bakelite cover to prevent EMI. Unexpectedly, the outgassing from the Bakelite caused the metal plating to blister, which shorted the collector to the case. When this problem was discovered, the metal plating was removed from the design. In hindsight, the designers didn't believe the plating was necessary in the first place.

Key Specifications

  • please add

Pictures

520

520A


Some Parts Used in the 520

Part Part Number(s) Class Description Used in
T5201 154-0513-00 154-0513-01 154-0513-02 154-0513-03 CRT CRT with special graticule 520 521 522