I tested some 6L6 tubes I have, some of them are new NOS (4 Russians and 1 JAN RCA), two others are used but full functional tubes.
All new tubes tested have 100% emission, the two old "Fivre" 6L6G (used) tubes have about 140%-150% emission.
I can't understand it, can someone explain this to me?
All new tubes tested have 100% emission, the two old "Fivre" 6L6G (used) tubes have about 140%-150% emission.
I can't understand it, can someone explain this to me?
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If too high anode current may indicate a very good tube or a gassy one (become gas or air inside), and then faulty.
They do not seem to be gassy, the getter is perfect, also the two tubes sound good in my 6L6 S.E. amplifier.
Please place all the out of spec tubes in a box and ship them to me, where I will wear them out a little for you and return them in 3 or 4 years time
The two tubes are 50 years old and too used to have such high emission.
I still do not understand...
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