If the amplifier filament transformer only produces 5 volts, it may reduce the life span of the yc257 since the. Cpi eimac is a leading manufacturer of power grid tubes covering a wide range of applications including broadcast, industrial and scientific. For 65 years, the eimac name has been synonymous with quality. Cpieimac is a leading manufacturer of power grid tubes covering a wide range of applications including broadcast, industrial and scientific. The penta laboratories pl88773cx1500a7 is a rugged ceramic and metal power. This page describes the construction of a 1500watt 2m amplifier using an 8877. Both types feature a directly heated thoriated tungsten filament. Eimac, now part of cpis microwave power products division, was founded in 1934 as eitelmccullough, inc. Mar 10, 2014 puri tronik is listed in trade indias list of verified sellers offering supreme quality of eimac 3cx15000a7 new hf power amplifier nos, eimac 3cx400a7 8874 ham radio, eimac 3cx1500a7 8877 ham radio etc. The eimac 88773cx1500a7 is a rugged ceramicmetal power triode designed for use as a cathode driven class ab2 or class b amplifier, in audio or rf. The internal structure features a mesh filament and a mechanical design which assures good strength and high rf operations efficiency. Unfollow eimac 3cx400a7 to stop getting updates on your ebay feed.
The eimac 88773cx1500a7 is a rugged ceramicmetal power triode designed for use as a cathode driven class ab2 or class b amplifier, in audio or if. Here is some data on the power triodes that might be usable by amateurs for radio projects. The eimac 3cx3000a7 highmu forcedair cooled power triode provides relatively high power output as an amplifier, oscillator, or modulator at low plate voltages. The filament voltage of the 3cpx1500a7 is specified by eimac to br 5. These figures may change without notice as the result of additional data or product refinement. As a linear amplifier, high power gain may be obtained without sacrifice of low intermodulation distortion and high amplifica. Maximumratingstypicaloperation classoftypeofserviceplateplate datasheet search, datasheets, datasheet search site for electronic components and semiconductors, integrated circuits, diodes and other semiconductors. Eimac 4cx1500b hf power amplifier nos at best price in medan. This sale is for one vintage unused eimac 3cx1500a7 aka 8877 triode. These tubes share a common naming convention in which the first number identifies the number of elements contained within the tube. Puri tronik is listed in trade indias list of verified sellers offering supreme quality of eimac 3cx15000a7 new hf power amplifier nos,eimac 3cx400a7 8874 ham radio,eimac 3cx1500a7 8877 ham radio etc. Richardson electronics is proud to be the exclusive global distibutor for. Like many eimac power tubes, the 4cx1500a7 is forcedair cooled, with a maximum anode core temperature of 250c. Operation in a class b with zero grid bias offers circuit simplicity by eliminating the bias supply, and in addition groundedgrid operation is attractive since a pow.
The eimac 4cx3500a is a compact tetrode designed to be used in vhf power amplifier service. Eimac catalog first page, datasheet, datasheet search, data sheet, datasheets, datasheet search site for electronic components and semiconductors, integrated circuits, diodes, triacs, semiconductors. The 3cx1500a78877 power triode is designed for use as a cathode driven class ab2 or class b amplifier, in audio or rf applications including the vhf band or as a cathode driven plate modulator class c rf amplifier. Eimac 3cx1500a7 the vintage technology association. The 4cx20,000c provides high gain in fm broadcast service and is also. Eimac normally states on the data sheet the amount of bleeding current that must be provided from the screen power supply to counteract the emission current.
Cpi, eimac division is a world leader in the design and manufacture of gridded vacuum electron devices. The emac 3500z is a compact power triode intended to be used as a zerobias classab2 amplifier in audio or radiofrequency applications. The eimac 3cx15,oooa7 is a ceramicmetal power triode intended for use as a zerobias class b rf amplifier or class c power amplifier or oscillator. Eimac continued to advance the technology and developed modern, highpower ceramic tubes which incorporate innovative pyrolytic graphite grids for shortwave and uhf television broadcast. Eimac 4cx1500b hf power amplifier nos at best price in.
Eimac 4a typical operating specs for grounded grid operation rare on. The products in this catalog are well suited for a wide variety of industrial applications. The companys first products were transmitting tubes with the high performance and stable design features that were required by the ham radio community. Eimac division of varian should be consulted before using. The 3cx1500a7 is rated for 2075w output at 30mhz, or 1520w at up to 220mhz. The 3cx1500a7 8877 power triode is designed for use as a cathode driven class ab2 or class b amplifier, in audio or rf applications including the vhf band or as a cathode driven plate modulator class c rf amplifier. The 3cx1500a7 is a power triode, designed for use as a cathode driven class ab2 or class b amplifier, in audio or rf applications including the vhf band or as a cathode driven plate modulator class c rf amplifier. The 15e is a miniature uhf power triode designed by eimac the eitelmccullough company of san bruno california usa in 1940 for use as an oscillator in the first american airborne radar, the asb search radar. The 4cx15000j8910 is intended for use in audio or radio frequency applications. As a buyer, you can access to a huge database providing information of obsolete and hardtofind parts in passive and active components, ics, semiconductors, and more. It features a type of internal structure which results in high rf operating efficiency up to 220 mhz. In addition, groundedgrid operation is attractive since a feedback. Characteristics and operating values are based performance tests.
The tube has a low inductance cylindrical filamentstem structure which readily becomes part of a linear filament tank circuit for vhf operation. Cathode driven rf linear amplifier, 3cx5000a7 datasheet, 3cx5000a7 circuit, 3cx5000a7 data sheet. Eimac 8875 amplifier tubes dentron mla radiparaccessori. Ptt line protection is lost in the manual of phenolic stock. This tube is also recommended for use as a vhf tv linear amplifier. If the amplifier filament transformer only produces 5 volts, it may reduce the life span of the yc257 since the filament will be 10% lower than specified. Low rf losses in this structure permit operation at full ratings to 110 mhz. I was a close friend of bill sain, the designer of the 8877 3cx1500a7, he developed the tube in a short 10 month period start to finsh. Cpi mpp division, eimac operations, 607 hansen way, palo alto, ca 94303. It remains a classic electron tube with high merits, when built correctly. Under the leadership of the founders, bill eitel and jack mccullough, the company.
As a linear amplifier, high power gain may be obtained without sacrifice of low intermodulation distortion and high amplification factor combine to make drive. Cpi, alldatasheet, datasheet, datasheet search site for electronic components and semiconductors, integrated circuits, diodes, triacs, and other semiconductors. The 8877 3cx1500a7 is primarily used in broadcast applications. The 4a8166 is a radialbeam tetrode designed for use in radio transmitters. Unit is a eimac power grid devices model 4cx1500b broadcast tetrode. The 3cx1500a78877 power triode is designed for use as a cathode. The 8877 3cx1500a7 is an fac triode manufactured by cpi eimac. The 88773cx1500a7 is primarily used in broadcast applications. I normally ship on the third business day after receiving payment. The eimac 88773cx1500a7 is a rugged ceramicmetal power triode designed for use as a cathode driven class ab2 amplifier in audio or. The design follows the classic w6po design which is described in the eimac notes. I purchased the plate lines and output tuning capacitors as a kit from harry, wa4ofssk. Cathode driven rf linear amplifier, 3cx1500a7 datasheet, 3cx1500a7 circuit, 3cx1500a7 data sheet. Operation with zero grid bias simplifies associated circuitry by eliminating the bias supply.
The 88773cx1500a7 is an fac triode manufactured by cpieimac. Eimac 4a typical operating specs for grounded grid. The eimac 88773cx1500a7 is a rugged ceramicmetal power triode designed for use as a cathode driven class ab2 or class b amplifier, in audio or rf applications including the uhf band, or as a cathode driven plate modulated class c rf amplifier. Varian eimac eimac application note 4 fc77 y678 1803ab m 8942 a ma2600 varian oeimac text. The eimac 3cx1500a7 is a large power triode intended for use as an audo or rf amplifier. Alpha pa70 pre 77d 8877 3cx1500 steel ceramic tube ham amateur linear amplifier duration. Eimac power grid tube quick reference data sheet page 1 of 2 3cx1500a7 8877 the eimac 3cx1500a7 8877 power triode is designed for use as a cathode driven class ab2 or class b amplifier, in, 12292008 eimac power grid tube quick, eimac division should be consulted before using this information for final equipment design. Full ratings on the 4cx15000j8910 apply 110 mhz, and it is especially. The 3cx10, 000a78160 is a highmu power triode and is intended for use as a zero bias class b amplifier an audio or rf applications, or as a class c amplifier, cw or modulated. As a linear amplifier, high power gain may be obtained without sacrifice of low intermodulation distortion and high amplification factor combine to make drive requirements. Eimac products are known for robust design and performance, long. Class b operation with zero grid bias offers circuit simplicity by eliminating the bias supply. In addition, groundedgrid operation is 3cx15,oooa7 highmu power triode 110 mhz.
The 4a is the largest of a series of tubes including the 465a, 4125a, 4250a, and the 4400a. Other useful information would include your experience with similar products, infomation on a product that you would purchase instead of this one, and so on. The 4cx15000j8910 is a tetrode manufactured by cpieimac. The 3cx1500a78877 power triode is designed for use as a cathode driven class ab2 or class b amplifier, in audio or rf applications including the vhf band as a cathode driven plate modulator class c rf amplifier. Eimac products are known for robust design and performance, long life, and value. Eimac equivalent tube product description aonovo supplies electron tubes which is equivalent with eimac, with reliable quality and more favorable price, widely used in military radar, communication, broadcast and industrial heating field. Pdf 3cx1500a78877 3cx1500a78877 gs\carolyn\desktop\objects\3cx1500a78877 3cx1500 3cx1500a7 eimac 3cx1500a7 8877 tube 3cx1500a7 3cx1500a filament eimac 3cx1500a7 8877 eimac 8877 vhf linear amplifier. The eimac 81694cx3000a is a ceramicmetal power tetrode designed to be used as a class abi linear amplifier in audio or radiofrequency, applications.
I was a close friend of bill sain, the designer of the 88773cx1500a7, he developed the tube in a short 10 month period start to finsh. The 4x1 tetrode is an anomaly when placed in himu gg triode service. Eimac operations, 607 hansen way, palo alto, ca 94303. Describe your experience with the eimac 3cx1200a7 and tell us why you give it the rating you did required. Eimac 3cx1500a7 datasheet pdf eimac 3cx1500a7 power triode. Eimac power grid devices model 4cx1500b broadcast tetrode. Where possible, eimac data sheets are provided, as eimac tubes are used by so many hams. Regarded as a technical innovator, eimac has become the worldwide leader in broadcast tubes. The eimac 4cx20,000c is a ceramicmetal powe tetrode intended for use as a vhf power amplifier it features a type of internal mechanical structure which results in high rf operating efficiency.
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