Heathkit-IT-21-tube data.pdf

Tube setting charts

Adobe Portable Document Format - 2.08 MB - 06/17/2022 at 18:47

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Heathkit it-17 tube tester.pdf

IT-17 manual and schematics. Single page schematics.

Adobe Portable Document Format - 836.13 kB - 06/17/2022 at 18:46

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Heathkit IT-21 tube tester.pdf

IT-21 assembly, manual, schematics. Better build instructions, but schematics are split between pages.

Adobe Portable Document Format - 1.67 MB - 06/17/2022 at 18:45

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