The PM KT66QD combines the same shape and style of the original GEC and M-O valve designs with modern materials and manufacturing techniques. These guitar tubes are of unsurpassed quality and reliability. Manufactured using the finest materials, these tubes not only look the part in vintage and modern amplifiers but will perform at least as well (if not better) than the original designs from GEC or M-O in all important areas, and can be expected to last at least as long as the originals. The tubes measured electrical performance matches the original GEC and M-O data exactly, and are branded in the style of the originals.
