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How Sencore's test dual triodes

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This Post Has Been Edited by the Author

In Reply to: RE: Sencore tube chart question posted by Jeffrey Lee on March 02, 2017 at 18:09:57

I think I have your answer. Some tubes (such as 6SN7's and 12AU7's) contain 2 triodes. Think of this as 2 individual tubes inside one glass envelope.
To test such tubes in your Sencore each triode is tested individually. Thus your tube data chart indicates 2 lines of set up information for your Sencore's A, B, C, and D set up switches with each line indicating how to adjust those switches to test one of the tube's triodes. I assume this is what you observe when you mention there are 2 sets of numbers for the tubes you ask about.
To test such a tube. Adjust the set up switches to the adjustments indicated in the chart's first line of adjustments, and then perform the tests you wish to run. To test the tube's other triode adjust the switches for the tube chart's second line of adjustments and then perform tests you wish to run.
To test most dual triode tubes with Sencores the test set up adjustments for a tube's 1st triode are also used to test its 2nd triode, except for the setting on the D switch. Which sounds like the situation you indicated.

Edits: 03/03/17

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