VacuumTubeEra

Test Instruments

Do-It-Yourself Vacuum Tube Voltmeter (VTVM)   (7 pages, 170 KB,  .pdf)

Mechanix Illustrated Tube Tester - August 1949   (6 pages, 6.5 MB,  .zip)

Precision E-200 Signal Generator Schematic - 1940   (1 page, 2.4 MB,  .pdf)

Jackson 709 Tele-Volter (VTVM) Instruction Manual - 1953   (23 pages, 4.7 MB,  .pdf)

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