$694.95 Buy It Now or Best Offer
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Seller Store machlett_factory_direct
(544) 100.0%,

Location: Newbury Park, California
Ships to: US,
Item: 226023121447

All returns accepted:ReturnsNotAccepted
Compatible Brand:Universal
Type:Tubes
MPN:Does Not Apply
Machlett:Machlett
Manufacturer Warranty:13 months

Machlett Factory Direct 3-500ZG / 3-500Z Machlett High-Mu Power Triode Matched Pair (2) Tubes The Machlett 3-500ZG is a high-mu power triode with a maximum plate dissipation rating of 500 watts. Cooling is by radiation and forced air through the base, along the envelope, and over the plate seal and radiator-type plate connector. It is intended for use as a zero-bias Class AB2 amplifier in radio-frequency or audio frequency applications. By eliminating the bias supply, zero grid bias operation greatly simplifies circuitry design. When operated in a cathode-driven circuit, a power gain of as much as twenty times is achievable. All Machlett tubes are burned in before testing and matching at our testing facility in Ventura, California. New Current Production New Design for longer life. Ceramic base controls temperatures better. No returns, however defective devices will be replaced free of charge for 13 months*Product is manufactured by affiliated or unaffiliated manufacturers in various countries. Country of origin is printed on the tube WHY MACHLETT FACTORY DIRECT? Once manufactured by Machlett, vacuum tubes undergo exacting quality control measures to further assure reliability. Each device is tested and graded for technical characteristics specified by Machlett engineers. Only after a component successfully passes these exacting challenges is it labeled and put into stock to be sold. The Machlett brand has a storied past. Founded in 1897 as E. Machlett and Son as a maker of scientific glass products, the company was a pioneer in the field of X-ray technology and collaborated with the likes of Madame Curie and other leading roentgenologists. Machlett LogoMachlett Laboratories was created in 1934 to produce X-ray tubes, and grew to become the world leader in the field. Machlett’s product line expanded to include transmitting tubes, and also did contract work for the Atomic Energy Commission. The company was acquired by Raytheon Manufacturing Company, as the conglomerate sought to increase its efforts in the area of microwaves. Raytheon had received a patent for a “high frequency dielectric heating apparatus” in 1945. Raytheon expanded their military microwave technology into commercial applications, introducing a huge microwave oven for hotel and shipboard use in 1947. The Raytheon Industrial Systems division was formed in Waltham, Massachusetts and subsequently acquired appliance manufacturer Amana. In 1967 the “Radarange,” the world’s first microwave oven designed for home use, was enthusiastically welcomed by the general public.As part of a parallel universe, Raytheon LogoPenta Laboratories, another tube manufacturer, was acquired by Raytheon in 1973 and the two operated as separate divisions. In 1988 Connecticut-based Machlett, which had manufactured magnetron tubes for Raytheon’s microwave efforts, was sold to Varian and absorbed into the California-based company. About the same time Penta spun off from Raytheon, becoming an independent entity. The company has become a primary manufacturer and distributor of a wide range of electron tubes, covering broadcast, industrial, research, military, medical and scientific applications. Penta LogoIts California facility is ISO 9001:2008 certified. Penta has affiliated manufacturing entities in Europe and Asia. In recent years Penta acquired the Machlett brand, and has retained the services of a cadre of highly experienced personnel who trace their roots back to the Raytheon Power Tube division. Penta has reinvigorated Machlett’s manufacturing and service operations. The company stands unique as the industry’s only microwave systems manufacturer that supplies its own magnetrons. *In the event of a failure, tube(s) must be sent back to us at the buyer’s expense. We will expedite any replacements after testing the tube internally at our expense.

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