michaelwjones Posted September 23, 2020 Share Posted September 23, 2020 These 2014 vintage tubes are backups and are In almost new condition with about 200 hours on the set. The KR 300B XLS is an ultra-linear, low frequency, high power triode tube capable of producing 25 watts of pure class-A power. This tube features a ribbon filament construction and the KR Enterprise exclusive patent design with 32 cathodes. The KR300BXLS tubes possess a vacuum of 10(-8) Torr, a maximum grid current of 2.0 microamperes and absolutely constant emission over the life of the tube. At my age. I just don't need three sets of 300B tubes in the closet... Includes factory packing and data sheets. $700 including shipping in the lower 48. PayPal is fine. Please email any questions. Thanks. Mike Quote Link to comment Share on other sites More sharing options...
RNL9 Posted April 13, 2023 Share Posted April 13, 2023 Pm’d Quote Link to comment Share on other sites More sharing options...
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