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Hello!
I am aware that the E and DR suffixes are military quality and special quality (IIRC) respectively, while no suffix is consumer production (AKA the rest :-)
6n3p-e and 6n3p-dr are well regarded tubes, but what about the consumer grade 6n3p? Does anybody have actual experience with them, are they so bad?
Could there be so much production variations so tubes not selected for military would sound extremely different than regular ones for audio work?
Thanks in advance,
Joris (Tube DIY escapee)
Follow Ups:
The 6N3P tubes came stock in my preamp. At first, they sounded pretty good to my ears, until I started "rolling". Then every other variant was better- including the 6N3P-E's and 6N3P-DR's.
They aren't bad tubes, in fact some might prefer them. I recall them being a little rolled off and dark sounding compared with others, but I haven't used the 6N3P's in a long time. They are definitely more microphonic. My experience is in an SRPP preamplifier.
Cory
I am not sure what makes that tube attractive - it has a rather lackluster set of parameters, but be it as it may, yes, the E and the DR versions are much more rugged than the plain one, much more tolerant of shocks and vibrations, and have longer life. This usually is not the result of selection, but better materials and beefed up construction - no selection will give you five times better shock resistance.
BTW, there is also the "I" version, specifically designed for pulse operation, and intuitively that would not be my first choice for audio work.
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