From Tektronix at :
'Tektronix cannot provide manuals for measurement products that are no longer eligible for long term support. Tektronix hereby grants permission and license for others to reproduce and distribute copies of any Tektronix measurement product manual, including user manuals, operator's manuals, service manuals, and the like, that (a) have a Tektronix Part Number and (b) are for a measurement product that is no longer supported by Tektronix."
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TM503, POWER MODULE, TEKTRONIX 056815
TG501, CAL PROC, TIME-MARK GENERATOR, TEKTRONIX, TYPES TG-501 AND TG-501 OPTION 1 015199
SG505, OSCILLATOR, TEKTRONIX, TYPE SG505 OPTION 01, PARTS, 063770
PS503, DUAL POWER SUPPLY, TEKTRONIX MODEL PS503, PARTS, 045354
POWER MAINFRAME, TEKTRONIX MODEL TM506 (NSN 6625-01-048-8920) 045398
PG508, PULSE GENERATOR, AN-USM-359A (TEKTRONIX PG-508 WITH TM 503) 049323
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