36,230
edits
520: Difference between revisions
Jump to navigation
Jump to search
no edit summary
No edit summary |
No edit summary |
||
| (3 intermediate revisions by 2 users not shown) | |||
| Line 9: | Line 9: | ||
|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 ( | * [[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 | * [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== | ||
| Line 51: | Line 56: | ||
</gallery> | </gallery> | ||
{{Parts|520}} | |||
[[Category:TV vectorscopes]] | [[Category:TV vectorscopes]] | ||