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520 - TekWiki

️Thu Aug 18 1966

Tektronix 520
NTSC/PAL vectorscope 520A vectorscope Produced from 1967 to (?) Manuals Tektronix 520 Manual Tektronix 520A Manual Tektronix 520 PAL Factory Calibration Procedure, September 1968 Tektronix 520 Entry in 1968 Catalog (All manuals in PDF format unless noted otherwise)

Tektronix 520

NTSC/PAL vectorscope

Produced from 1967 to (?)

Manuals

(All manuals in PDF format unless noted otherwise)

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

Links

Documents Referencing 520

Document	Class	Title	Authors	Year	Links
Service Scope 47 Dec 1967.pdf	Article	A New Vectorscope		1967	520
Tekscope 1971 V3 N6 Nov 1971.pdf	Article	A Quick-Cal Procedure for the 520 Vectorscope	Ed Handris	1971	520
Tekscope 1971 V3 N6 Nov 1971.pdf	Article	Tektronix and the World of Television Measurements	Stephen D. Kerman	1971	520 • 140
TekWeek (partial) October 10, 1975.pdf	Article	Questions for guest speakers	Tom Long • Steve Kerman • Dave Friedley • Thor Hallen • Charlie Rhodes	1975	Communications division • TV products • Grass Valley Group • 528 • 1480 • 520 • 1420

Documents Referencing 520A

(no results)

Patents that may apply to 520A

Page	Title	Inventors	Filing date	Grant date	Links
Patent US 3453403A	Power selection device	Eldon Hoffman	1966-08-18	1969-07-01	115 • 140 • 141 • 141A • 144 • 145 • 146 • 147 • 148 • 149 • 149A • 230 • 284 • 286 • 453 • 454 • 491 • 520A • 521A • 522 • 545B • 547 • 556 • 561B • 564B • 568 • 576 • 611 • 647A • 2101 • 2601 • 5030 • R5030 • 5031 • R5031 • 7503 • 7504 • 7704 • 7704A • 7904 • R7903