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RE: NYAL OTL3

The 6lu8 is a dual section tube, if both sections show near 100% emission and no shorts or leakage they should be fine. The problem I ran in to was that one section was strong and the other weak, I use a Amplitrex 1000 to analyze all my tubes, it tests all parameters under load then sends it to my computer so I can test a lot of tubes then pull up all the results and compare. It differs from standard testers that are military type, those will show a tube to be 100% when it's actually only around 70% spec. It took over 30 NOS GE tubes from the same batch and date to yield the 4 that were 100% on each section. That said when I did the alignment with all the tubes verified thru testing on the Amplitrex, 6lf6's 6lu8's 6ej7 and the 6fs5, the alignment was a snap with well over 50% range remaining to keep them aligned properly as the tubes age.


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