I recently A/B'd some NOS Tungsol 5881 and new production TAD 6L6-WGC in a Tone King Meteor II (cathode bias) and Germino Club 40 (fixed bias). In my opinion, the TAD 6L6-WGC sounded better -- much better, actually. There is no need to hunt down an expensive NOS 5881.Originally posted by Pedro58
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But new production 5881's are hard to come by. If you want anything decent, you gotta go NOS. (snip...)