NOS Haltron England 6SL7GT Vintage Preamp Triode Audio Tube
old stock haltron united kingdom 6sl7gt audio tube w/ box, good used gm spec / your results will varyold production w/ the most precious metallurgy of the tube era = more accurate sound reproductiondirect overseas import carefully curated from collections full amplificaton test 84/85 % mutual gm (65 % good) + useful life test, and leak short gasour unique mutual gm output test applies 225 vdc simulating actual circuits w/ filtered dctwice tested! also supplier emissions tested …circuit test = best test give 100+ session hours w/ your specific amps voltage to fully settleships fast worldwide well packed + combined postage available ~authentic vintage hifidelity audio curation by caliacoustics~