We frequently have available the 4PR1000A (JAN 8189), which is the pulse rated version of the 4-1000A.  The 4PR1000A is the "cream of the crop" of the 4-1000A's, tested to ex tr emely high voltages encountered in pulse service . We typically get Triton (Triton bought Eimac's glass tube division in 1998) and Amperex.  If interested in our removed from equipment / tested / guaranteed stock and pricing (based on brand and percent of new tube output under test), please inquire. Stock changes daily.

We also have many of the 4PR1000A which do NOT pass our stringent testing, but which still LOOK beautiful (an extremely impressive tube for display) which we sell for that purpose. Many have made very impressive lamps with this tube, mounting it on a wooden base, with white LED's or low voltage bulbs shining upward through the (very convenient) holes in the tube base. This arrangement gives the visual impression of lighted tube filaments, without having to actually light the tube filaments... something you would NOT want to do. These very beautiful but sick tubes are $25 each for Triton, and $29 each for Amperex, when available.  Order as 4PR1000A "dud", and specify brand desired. NOTE:  Currently out-of stock on Amperex.

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Amperex or Eimac 8247 / 4PR125A or 4D21 / 4-125A tubes

We have a small supply of these Amperex (made in France) 4PR-125A and Eimac 8247 / 4PR-125A and Eimac 4D21 / 4-125A  high vacuum, radial beam tetrodes for sale. These tubes were removed from military equipment which was working at the time of removal from service. We have no way to test these tubes, but we offer a 30 day satisfaction guarantee, less only shipping / handling should return or exchange be necessary. If you have a manufacturer or type preference, please state so in “comments” section of order form, and we will advise if your choice is no longer available. A data sheet on the pulse-rated tubes may be examined here: http://www.g8wrb.org/data/Eimac/4PR125A.pdf

Order as:  (Your preferred manufacturer and tube type)        Price each : $39.00 (Order Now!)

These tubes are designed for service as an industrial oscillator at frequencies up to 120 Mhz. We currently have the four tubes shown in the photo available: One Eimac YU-191A, one Mullard YD-1172, and two Valvo YD-1172. These tubes are of course subject to prior sale, so please verify stock before ordering!

These three types are essentially the identical tube, and are used interchangeably in a wide range of industrial equipment. While the tubes we have in stock look like new or almost like new, they were in fact removed from retired industrial equipment, which appeared to have had very little (or no) use.

While we do not have the ability to test these tubes, your satisfaction is absolutely guaranteed, and backed up with a 30 day refund or exchange privilege, less only shipping and handling charges. A detailed data sheet for the Mullard YD-1172 may be examined at this link:

http://pdf1.alldatasheet.co.kr/datasheet-pdf/view/234609/NXP/YD1170.html

Weight is approximately 4 pounds. Price: $ 595 each! (Order Now!)

• 4X150D / JAN 7035
• 4X150A / JAN 7034
• 7609 (Similar to 4X150D)
• 4CX250B / JAN 7203
• 4CX300A / JAN 8167
• Y-180 (Nickel-plated version of 4CX300A)
• 4CX350A / JAN 8621
• 4CX350F / JAN 8322
• 4CX1000A / JAN 8168
• 3CX1500A7 / 8877
• 8072 (Used in many Signal One radios)
• 8122 (Used in National NCL-2000 amplifier)

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The L-4945A is a crowbar Thyratron (klystron and IOT protection). We have only one unit available, brand new / unused, in original box. Date code is December, 2000.  Made by Litton Electron Devices, 1035 Westminster Drive , Williamsport , PA 17701-3911

Ratings:

• High voltage gaps: 2
• Anode voltage: 40 kv
• Peak anode current: 1500 amps
• Coulomb transfer per pulse: 7 coulombs
• Control grid drive: 800 volts, 0.6 amps
• Cathode heater: 800 volts, 22 amps AC
• Reservoir heater: 6.3 volts AC, 3 amps AC
• Cross reference: CX2708  (NOT a direct replacement for this type. “Cross reference” was listed in Litton literature.) 

Supplied with original factory "Final test procedure performance sheet". Our price:  $595 ! (Order Now!)

Sorry, but this item can be shipped ONLY to US addresses (the 50 US states). Please do not ask for worldwide shipping on this item.

JAN-8951 Thyratron

We have several of these new, unused, old stock thyratrons by two manufacturers, ITT Electron Tube Division, and EG&G. Sorry, but we do not have data sheets available… we would welcome a copy for reference of other customers if anyone has one available, or if you can direct us to a link. These items are shipped ONLY to US addresses. Sorry, no export on this item. If you have a manufacturer preference, please state, and we will ship your choice as long as stock exists. If not, we will notify you for further instructions.

Order as our stock # JAN-8951 thyratron Price each:  $99.00 An absolutely outstanding buy! (Order Now!)