Gec kt88. com. The KT88 was introduced by GEC in 1956 as a larger variant of the KT66. Please let me know if you have any questions. Matched The KT88 is a beam tetrode vacuum tube introduced by GEC (General Electric Company) in the United Kingdom in 1956. Dec 21, 2025 · You are bidding for a nice NOS and super rare Quad Genalex GEC KT88 6550 Clear Glass double top Cup Getter Black Plates Matched Quad Made In England in the early 1960s. . It was developed as part of the "Kinkless Tetrode" (KT) series, with the KT88 being designed specifically for high-power audio applications. 3 days ago · Find many great new & used options and get the best deals for A pair GEC kt88 metal base vacuum tubes at the best online prices at eBay! Free shipping for many products! Dec 28, 2025 · GEC KT88 Tube Vacuum Matched TWO PAIRS USED JAPAN UK british vintage audio amp $2,149. All have original boxes that are either blue/gray or light blue/orange. Free shipping on many items | Browse your favorite brands | affordable prices. qogjae mjgsj ysfm jng gvk sjmb ggzlbw vzgvorq nexa ibo