Available is a laboratory-verified matched pair of vintage Hytron 1626 (VT-137) triodes. Manufactured in the U.S.A., these Black Plate valves feature a Brown Base and Tin Cup Getter. Preserved in New Old Stock (NIB) original government boxes, these are the premier choice for “Darling” SET amplifiers and high-end audio restorations.

Each unit has been analyzed on the Amplitrex AT1000. Following the Percentage Method, the results below indicate performance relative to factory design-center specifications (Ip = 20.mA / Gm = 2000 µMhos).