OUR VERY OWN DESIGN OFFERING – Semi-built, standard power, vacuum Tube Battery Eliminator Power Supply. This is the standard version, of our Battery Eliminator Power Supply kit line, for use with most antique radio receiver sets. See our other listings for a LOWER cost, completely unbuilt kit, and a lower powered, lower cost version for miniature tubes. This kit has a built and tested printed circuit board. You need to do the interconnecting wiring, mounting, and necessary round hold drilling of the plastic case. One photo shows a finished built unit. This kit features three, independent DC power sources, to provide B+ (high voltage), A+ (filament voltage) and C- (grid voltage), for vacuum tube radios and other electronic equipment. The kit provides the following voltages and currents. BE SURE IT MEETS THE REQUIREMENTS OF YOUR RADIO. For 120 VAC input voltages only. B+ circuit consists of a standard series string of twelve zener diodes. Twelve diodes allow more taps, and reduces component heating. Standard taps of 22, 44, 66, 88 110 and 132 volts nominal, with additional taps of 33, 55, 77, 100 and 122 available on the board. Maximum nominal current of 50mA at 132 volts. Exact voltages will vary due to component variations, and load. Current limiting is provided by a PTC resettable fuse, and conventional fuse. A+ circuit consists of a LM350 voltage regulator. Variable output from 1.2 – 6.3 volts by onboard trimmer, up to 2 amps. C- circuit provides an adjustable, zener regulated 0 – 21 volts by onboard potentiometer. Three onboard LED’s provide indication of A, B and C voltages. Quiet, onboard 40mm fan provides cooling for longer component life. NOTE: The unit must be operated in an enclosure at all times. Only for sale to people experienced with line powered, high voltage devices. For indoor use only. Not for sale to, or use by minors. Choice of gray or black vented enclosure, specify when ordering. High quality fiberglass circuit board. Single sided design without plated through holes, for easy repair if necessary. Board has three different color LED’s to monitor each supply. AC line input fuse, and individual PC board mount fuses for each section. All fuses have sockets for easy replacement if necessary. Fuses included, user should fuse unit to your particular application. Connections are made by a 12 pair, insulated screw terminal connector, mounted on enclosure front. User must determine connection use for their equipment, includes schematic and parts list, no operating instructions included. See our other listings for more Radio, Electronic and other RARE and UNIQUE items. It is assumed that the unit(s) will be installed and operated by qualified personnel. Not responsible to damage caused to connected equipment. See our other listings, for more of our EXCLUSIVE PC board kits, including reproduction Knight Allied and Heathkit items shown below. Powered by SixBit’s eCommerce Solution. This item is in the category “Collectibles\Radio, Phonograph, TV, Phone\Radios\Tube Radios\1930-49″. The seller is “ppelectronics” and is located in this country: US. This item can be shipped worldwide.