NOS in original boxes. Labeled and boxed as National 6L6WGB. Similar specifications to 5881s. One pair left! One tube has a small chip in the base. This does not affect operation in any way.
Best of the new production KT66s in both tone and reliability. Ruby boxes. Remarkably similar tone quality to the MO Valve (Genelex, GEC, Mullard, etc) originals. Matched within 4mA.
Standard Matching within 3mA.
One matched pair (within 4mA) in plain white boxes in stock (11/12/2025)
These work great in old Fenders requiring 5881's or 6L6's. Good substitute in 6L6GC amps where less headroom (breakup at lower volumes) is desired. Also make great replacements in Fender Deluxe's where more clean headroom is desired. Just plug into your Deluxe and re-bias, no circuit changes required. Excellent choice for most 6L6GC amps if you'd like a little less clean headroom. These hold up well in amps with plate voltage up to 470 volts.