Home Tubes Asylum

Questions about tubes and gear that glows. FAQ

Origin of Hickok Roll Chart Data Remains a Mystery

In an earlier post about the TV7 tube tester, someone asked about the origin of Hickok roll chart data. The question was also raised about whether the various voltage drops were accounted for in the Hickok data.

I spoke with Wendell Hall today about this subject. Wendell has worked on Hickok equipment for many decades, and is the best historical source I know. Wendell was absolutely certain that the voltage drops were accounted for in the data, and that it was not correct to reset a TV7 to line with plate current flowing--saying this would throw the readings off. Wendell wondered how a TV7 COULD be reset to line with plate current flowing--and so do I--unless a separate AC voltmeter was used to monitor the primary of the power transformer. As to the origin of the roll chart data--even Wendell did not know. He told me what I already knew about the secretive nature of the Hickok company. They just did not share much information, and anyone who knew about how Hickok arrived at their data is probably long gone.


This post is made possible by the generous support of people like you and our sponsors:
  The Cable Cooker  


Topic - Origin of Hickok Roll Chart Data Remains a Mystery - Chris Haedt 13:39:30 09/03/03 (3)


You can not post to an archived thread.