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Sovtek's 5881WXT - Platinum Matched (Single)
Tubes by Sovtek
Manufacturer's Description:
Sovtek 5881WXT's are available in platinum matched sets. Our platinum matching process consists of a 24 hour tube burn-in period followed by a bias (plate) current measurement in milliamps. Please specify matched tube grouping (ie. pair, quad, sextet, etc.) when ordering (no odd-quantity groups, please).