Tubes Asylum

How Sencore's test dual triodes

108.183.73.227

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.

With Sencores, for most if not all dual triode tubes, the only difference in the test set up adjustments for each triode section inside a tube will be the setting on the D set up switch. Which is the situation you indicated.

Follow Ups: