Tube tester charts

[Terry Perdue]

I have occasionally wanted to test a tube that doesn't appear on my IT-17's
roll chart. The top of the chart says that for unlisted tubes I should refer
to the "supplemental" chart. I assume that these were furnished in book form
periodically. Does anyone have any of these charts that they would be
willing to copy for a reasonable cost?

Thanks in advance.

Terry Perdue

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