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Set of 6 Jan5751 valves. All factory tested. Bought from Watford valves as spares. Five are cryo treated one is not. Mint condition
The GE Jan5751 is a beloved preamp tube, often hailed by guitarists as the "Holy Grail" for its tough, military-grade construction and lower gain factor of roughly 70 compared to the standard 12AX7. At £200, this listing sits just above the median of £181 from your recent comparable GBP listings, making the asking price fair rather than a bargain or ambitious. It is well within the typical range, comfortably between the 25th percentile of £48 and the 75th percentile of £315, so there is no need to call it out as a strong deal or overpriced.
This tube is well-regarded for its ability to sub for a 12AY7 in Fender tweed amps or act as a reverb driver like a 12AT7, offering a smoother, less aggressive tone that many players seek. The excellent condition noted in the listing adds meaningful upside, especially for original-owner pieces that are rare in such pristine states. Since the price is fair and the condition is clean, this represents a solid buying opportunity for enthusiasts looking to upgrade their amp’s preamp section without the risk of questionable reliability.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
General Electric, the American multinational conglomerate founded in 1892 through the merger of Edison General Electric and Thomson-Houston Electric, traces its roots to the dawn of the electrical age. Emerging from Thomas Edison's innovations in power generation and lighting, GE quickly expanded into radio and electronics, notably by acquiring the Marconi U.S. subsidiary in 1919 to form RCA, the dominant force in consumer radio receivers through the mid-20th century. This heritage positioned GE as a pioneer in electrical engineering, with early forays into broadcasting stations and vacuum tube production that laid the groundwork for its audio legacy.
In hi-fi circles, GE stands out for its vintage vacuum tubes, particularly the renowned 5-Star series like the 12AX7, developed in the mid-1940s from military-spec designs acquired via the 1945 purchase of Kentucky Radio Company's Ken-Rad brand. These tubes powered aviation communications, broadcast gear from makers like Gates and Fairchild, and iconic Fender guitar amps such as the Princeton, defining the raw tone of American rock and blues from the late 1940s to the early 1960s. While GE produced rack-mounted audio panels and amplifiers into the 1950s, its consumer hi-fi output was limited compared to full systems.
Today, GE holds a cherished niche among vintage collectors and tube enthusiasts, prized for the linear response, quiet operation, and warm sonics of its 5-Star tubes rather than modern high-end gear. No longer active in consumer audio, its components command premium prices in the aftermarket, appealing to restorers and boutique amp builders seeking authentic mid-century American sound.
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