4 x 12AY7 GE Tubes Made in USA Short Grey Plates O - Getter The lettering may be smudged/missing Tested on enhanced Triplet E3444 Laboratory Tester Results =1450/1570 micromhos @ 2.1/2.8 mA1620/1640 micromhos @ 2.4/2.5 mA1680/1670 micromhos @ 2.9/2.8 mA1480/1430 micromhos @ 2.2/2.3 mA Bogey(100% or New) = 1700/1700 micromhos @ 3.0/3.0 mA The measurements in this listing were taken on a Triplett 3444 modified to test the tube as an amplifier in accordance with RMA/EIA specifications, utilized by all US and most foreign tube manufacturers. This tester applies test conditions for this tube as shown below (including the precise filament voltage) and then measures transconductance (gm) in accordance with the engineering definition of gm. Tubes may also be operated under the test conditions for extended periods to be sure that it is stable. A tube must be tested in this manner to compare its test results with the manufacturer’s original intent or with other tubes of the same type. Most tube testers do not apply the test conditions required or conduct a valid gm test. For more details on the test and our test equipment, please contact us.The test conditions for this listing are__250_Volts plate, __250_Volts screen, ___-4.0___Volts bias or Cathode resistance*What were your tubes tested at? ***Ask any questions before buying, not after*** I do combine S&H

4 x 6sn7gtb RCA Tubes Made in USA Black Plates Lower D Getters Tall Boy The lettering may be smudged/missing Tested on Enhanced Triplet E3444 Laboratory Tester prepared by Paul Hart of Roswell Ga. Results = 2280/2270 micromhos @ 10.2/ 9.8 mA2430/2380 micromhos @ 8.0/ 7.9 mA2280/2150 micromhos @ 11.0/10.3 mA2330/2270 micromhos @ 7.4/ 7.0 mA Bogey (100% or New) = 2600/2600 micromhos @ 9.0/9.0 mA +/- 10% The measurements in this listing were taken on a Triplett 3444 modified to test the tube as an amplifier in accordance with RMA/EIA specifications, utilized by all US and most foreign tube manufacturers. This tester applies test conditions for this tube as shown below (including the precise filament voltage) and then measures transconductance (gm) in accordance with the engineering definition of gm. Tubes may also be operated under the test conditions for extended periods to be sure that it is stable. A tube must be tested in this manner to compare its test results with the manufacturer’s original intent or with other tubes of the same type. Most tube testers do not apply the test conditions required or conduct a valid gm test. For more details on the test and our test equipment, please contact us.The test conditions for this listing are__250_Volts plate, __250_Volts screen, ___-8.0___Volts bias or Cathode resistance*What were your tubes tested at? I do combine S&H

4 x #26 Globe Tubes Made in USA One is marked Plato-226 The other 3 have no markings All have similar construction Tested on enhanced Triplet E3444 Laboratory Tester Results = 1110 micromhos @ 6.5 mA 1190 micromhos @ 5.0 mA1140 micromhos @ 4.9 mA 1250 micromhos @ 6.9 mA Bogey (100% or New) =1150 micromhos @ 6.2 mA +/- 10% I do combine S&HThe measurements in this listing were taken on a Triplett 3444 modified to test the tube as an amplifier in accordance with RMA/EIA specifications, utilized by all US and most foreign tube manufacturers. This tester applies test conditions for this tube as shown below (including the precise filament voltage) and then measures transconductance (gm) in accordance with the engineering definition of gm. Tubes may also be operated under the test conditions for extended periods to be sure that it is stable. A tube must be tested in this manner to compare its test results with the manufacturer’s original intent or with other tubes of the same type. Most tube testers do not apply the test conditions required or conduct a valid gm test. For more details on the test and our test equipment, please contact us.The test conditions for this listing are__180_Volts plate, __180_Volts screen, ___-14.5___Volts bias __-1.4 __ Volts FilamentWhat were your tubes tested at? I do combine shipping

Ruby 12AX7A Preamp Tubes - Quad Set THIS LISTING IS FOR UNMATCHED TUBES - Previously used tubes that are fully functional with plenty of life left in them, strong rating. The item may exhibit signs of cosmetic wear, but is fully operational and functions as intended. Unless specified or shown otherwise, tubes most likely will ship in an unoriginal box. When you purchase from our warehouse, your order will be thoroughly inspected and carefully packaged to ensure that your item arrives in a timely and safely fashion. You will automatically receive tracking information as soon as we print the shipping label. Items typically ship out within 1-2 business days. All merchandise has been tested. Any issues found are noted clearly in the description above. +BUY WITH CONFIDENCE+ ++SHIPPING FEES APPLY FOR BUYERS IN HAWAII, ALASKA, PUERTO RICO, VIRGIN ISLANDS - PLEASE CONTACT US FOR RATES BEFORE PURCHASING++#15

Tested on my Amplitrex. GM: 1500/1800 1500/1600 1500/1600 1300/1300 1600=NOS Amplitrex tested

4 x CX-226 Cunningham Globe Tubes Made in USA Hot stamped basesTested on enhanced Triplet E3444 Laboratory Tester Results = 990 micromhos @ 5.9 mA 840 micromhos @ 4.6 mA740 micromhos @ 3.7 mA 720 micromhos @ 7.2 mA Bogey (100% or New) =1150 micromhos @ 6.2 mA +/- 10% I do combine S&HThe measurements in this listing were taken on a Triplett 3444 modified to test the tube as an amplifier in accordance with RMA/EIA specifications, utilized by all US and most foreign tube manufacturers. This tester applies test conditions for this tube as shown below (including the precise filament voltage) and then measures transconductance (gm) in accordance with the engineering definition of gm. Tubes may also be operated under the test conditions for extended periods to be sure that it is stable. A tube must be tested in this manner to compare its test results with the manufacturer’s original intent or with other tubes of the same type. Most tube testers do not apply the test conditions required or conduct a valid gm test. For more details on the test and our test equipment, please contact us.The test conditions for this listing are__180_Volts plate, __180_Volts screen, ___-14.5___Volts bias __-1.4 __ Volts FilamentWhat were your tubes tested at? I do combine shipping

4 x CX-226 Cunningham Globe Tubes Made in USA Hot stamped basesTested on enhanced Triplet E3444 Laboratory Tester Results = 930 micromhos @ 5.8 mA 950 micromhos @ 4.9 mA980 micromhos @ 10.1 mA 870 micromhos @ 4.2 mA Bogey (100% or New) =1150 micromhos @ 6.2 mA +/- 10% I do combine S&HThe measurements in this listing were taken on a Triplett 3444 modified to test the tube as an amplifier in accordance with RMA/EIA specifications, utilized by all US and most foreign tube manufacturers. This tester applies test conditions for this tube as shown below (including the precise filament voltage) and then measures transconductance (gm) in accordance with the engineering definition of gm. Tubes may also be operated under the test conditions for extended periods to be sure that it is stable. A tube must be tested in this manner to compare its test results with the manufacturer’s original intent or with other tubes of the same type. Most tube testers do not apply the test conditions required or conduct a valid gm test. For more details on the test and our test equipment, please contact us.The test conditions for this listing are__180_Volts plate, __180_Volts screen, ___-14.5___Volts bias __-1.4 __ Volts FilamentWhat were your tubes tested at? I do combine shipping

Dear buyers, we are pleased to offer you 4 x 6N23P/ ECC88/E88CC/6DJ8 Selected Quad Reflector Tubes, Double Getter, produced in 1968 and 1969. Test Results: Tube 1: Ia = 15.2 / 15.0mA Tube 2: Ia =14.8 / 14.8mA Tube 3: Ia =15.0 / 14.8mA Tube 4: Ia =14.8 / 14.6mA I sent the tubes by registered mail with a tracking number. Thanks for watching! I wish you much success!

one quad of ge jan 5751 tubes, these are nos from bulk i have had for years, this set all 8 sections tested right around 1400 on a hickok 539c tube tester, no leakage or shorts. many more of these type of items listed in my store, check it out !

Technical characteristics and electrical parameters of the 6P14P lamp:Filament voltage 6.3 ± 0.6 VFilament current 760 ± 60 mANominal anode voltage (constant) 250 VAnode voltage limit 300 VAnode current 48 ± 8 mACathode current limit 65 mAGrid voltage second rated (constant) 250 VGrid voltage second limit (constant) 300 VThe second grid current is not more than 7 mAPower dissipated by the anode, limiting 14 WThe power dissipated by the second grid, limiting 2 WLimit voltage between cathode and heater (constant) 100 VSlope 11.3 mA / VThe gain in a triode connection is about 20Internal resistance 30 kOhmResistance in the cathode circuit for automatic bias 120 OhmInput capacitance about 11 pFOutput capacitance about 7 pFPass-through capacitance about 0.2 pFGlass miniature decoration

  TUBE HUNTER VACUUM TUBE GEMSTHESE ARE THE SPECIFICS OF THE TUBE/TUBES FOR SALE THESE ARE THE TUBE/TUBES FOR SALE:    MANUFACTURER:                                GE PRODUCTION CITY:                                      USA TUBE TYPE:     12B4A DESIGNATION:                                                TRIODE COPPER POST YEAR:     1960s MONTH or WEEK      Date code match       SILK SCREEN CONDITION %:                   100% MICA:   2 MICA PLATES:    BLACK GM%:   122%,  122% 121% 123% SINGLE/PAIR/QUAD/MULTI:   QUAD GETTER:                                                         O GETTER DATE CODE                                                      STOCK PHOTO AUCTION IS FOR ONE QUAD. VERY STRONG AN NEAR PERFECT BALANCE ALL THE SAME DATE AND CONSTRUCTION Normal 0 false false false EN-US X-NONE X-NONE On my tester a B&K 747 tester:    Below 55 = BAD      55-66 = ?     65 -100 = Good     100-120+ = NOS          I want to see you happy with your purchase. I will never sell a tube that is below standard…… I have sold many tubes here on Ebay, and all my customers have been completely satisfied. I will work with you in good faith if there are any problems, or if you are unsatisfied in any way. I want your business now and in the future, so I assume you are the boss, and I am the employee. All tubes are tested for shorts, continuity, and emissions. I prefer PayPal. ALL CUSTOMERS PLEASE READ ALL NOTES BEFORE BUYING FROM ME !!1.  RETURNS: It is my highest desire that you are completely satisfied with your purchase from me. I will bend over backwards to make sure that you are a happy customer.If anything you buy from me is less than satisfactory, message me BEFORE you either open a case or hit the “item not as described” button.Sound quality is tremendously SUBJECTIVE. For tubes returned for noise or sound quality of any kind you pay for the shipping we refund the purchase. We refund the price of the item NOT THE SHIPPING COST. If we sent the wrong tube we will of course pay for return shipping. For any tubes that are DOA we require that you send a us a picture of the shipping box to show us the damage. We test EVERY tube sent out and none should be DOA unless broken in shipping.2.    PLEASE NOTE:  Tube silkscreen (lettering on the tubes) is VERY fragile. It can be wiped off and destroyed VERY easily. If you wipe off the silkscreen while handling the tube you diminish their value by up to 70%. DO NOT handle the tubes or hold them from the cylinder. ALWAYS hold them from the ENDS. If you are returning tubes and they are not in the same condition cosmetically I cannot give you a full refund. THIS IS VERY IMPORTANT.3.  UNLESS YOU MAKE ARRANGEMENTS WITH US BEFORE YOU PURCHASE, YOU MUST PAY FOR ITEMS PURCHASED WITHIN 2 DAYS OR A CASE WILL BE OPENED FOR AN UNPAID ITEM!!!4. TESTING: I test all tubes that I sell in one way or another, or I will state untested. I have a B&K 747 tube tester. This is a mutual conductance tester. It give a percentage value of gm for the tube under test and checks for shorts and grid emissions. I also use a Tektronix curve tracer for testing triodes. I give a number of evaluations for tubes. One evaluation is a screen shot of the tube with a high voltage applied to the plate. This helps the buyer see the linearity of the tube in question at the highest voltage the tube will see in a real circuit. The Curve tracer steps the triode through 10 gate/grid voltages starting with -10 volts and going to 0 volts. The lines show how the tube conducts throughout that range. At 0 volt the tube is at max conduction and is the top line on the display. It is easy at that point to take where that top line intersects the plate voltage, find the milliamp level and compare it to the datasheet. I give those numbers for you in the Item condition box. To further help the buyer I also include the Design values, for gm and ma readings in the table. This can then be compared to other tube sellers using inferior test methods such as Hickok,  Amplitrex, and other testers. The Tektronix curve tracer gives values within 3% of the actual value. The very best portable testers only can approach 10% accuracy.5.    Please note: The numbers given for gm are what I see on my tester. I DO NOT guarantee that you will see those numbers on your tester. I only guarantee that these tubes will test good, with no shorts, or gas, on a decent calibrated tester. I dont guarantee or imply anything else.6. VERY IMPORTANT!!! Vintage tube testers almost always, due to age, have VERY LOW HEATER VOLTAGES!!!  Every tester I have ever bought is below 6 volts when selecting 6.3 volts. They average 5.8 volts. The voltage NEEDS to be 6.3 and 12.6. You can calibrate a vintage tube tester all you want. If the heater voltage is not right, you will NEVER get the right gm value. I have customers complain that their tubes are not the same as what I see on my tester. They say they have a calibrated tube tester. I have 40 tube testers. On all of them I have an outside regulated DC power supply that feeds the tube tester the correct heater voltage.7. I dont check each and every tube for noise or tone. This is SUBJECTIVE and it is too time consuming. If you dont like the noise level or the tone we offer a hassle free refund policy.  International customers note:1. Please wait for us to invoice you for the correct amount. If you have purchased more than one item, we must calculate how much the shipping will be. Shipping will be HIGHER due to insurance and shipping methods needed for expensive item totals. If you are buying only one item this will not be an issue. 2. Under no circumstances will we state on a US customs a declared value of less than the sale price. This is an honesty issue. We are honest with everyone to the best of our ability to do so. We want you to trust that what we say is true. There cannot be that trust, if we make false statements knowingly to anyone. If your country has tariffs/taxes so high that they cause large numbers of normally honest folks to make false statements, we urge you to work for change of those laws.3 International buyers if you bought more than one item and want combined shipping it will ship in 2 days.4. And all the Angels sang because the heavenly music was playing and it was turned all the way up.    Listing and template services provided by inkFrog

4 x 6SN7gta Sylvania Tubes Made in USA Black plates Chrome Dome Matching Date codes on top E4B = 1954 Matching warranty codes on base = 448 ***The auction is for 4 tubes *** Tested on Enhanced Triplet E3444 Laboratory Tester Results = 2640/2470 micromhos @ 7.3/7.1 mA 2510/2520 micromhos @ 7.4/7.9 mA2530/2590 micromhos @ 7.5/8.2 mA 2460/2510 micromhos @ 6.8/7.2 mA Bogey (100% or New) = 2600/2600 micromhos @ 9.0/9.0 mA +/- 10% The measurements in this listing were taken on a Triplett 3444 modified to test the tube as an amplifier in accordance with RMA/EIA specifications, utilized by all US and most foreign tube manufacturers. This tester applies test conditions for this tube as shown below (including the precise filament voltage) and then measures transconductance (gm) in accordance with the engineering definition of gm. Tubes may also be operated under the test conditions for extended periods to be sure that it is stable. A tube must be tested in this manner to compare its test results with the manufacturer’s original intent or with other tubes of the same type. Most tube testers do not apply the test conditions required or conduct a valid gm test. For more details on the test and our test equipment, please contact us.The test conditions for this listing are__250_Volts plate, __250_Volts screen, ___-8.0___Volts bias or Cathode resistance What were your tubes tested? I do combine S&H

Vintage Audio UKVALVE AMPLIFIERS . TURNTABLES . LOUDSPEAKERS . VALVES TANNOY . QUAD . LEAK . GARRARD . SME . ROGERS . LOWTHER . DECCA MULLARD . BRIMAR . GEC . MAZDA . MARCONI WORLDWIDE SHIPPINGDescription Vintage RS Tube Capacitors x3 - 1960sFor Leak Quad KT66, PYE EL34, HMV Decca PX25 Valve Tube Amplifiers etcPlease check the photos I Will Ship Worldwide!Check my other auctions for vintage audio. Shipping Policy Worldwide postage through eBay global shipping programme. All items are sent within 3-5 days of auction ending. All orders are tracked with DHL, UPS, DPD or Royal Mail with protective packing for transit. Thank you for looking, please check my other eBay auctions Vintage Audio UK BRITISH AUDIO SPECIALISTS FOR 25 YEARS

Up for auction is this strong testing match quad of grey plate RCA clear top 12AU7 audio tubes. All four tubes would make a super nice addition to anyones collection or to use either one. All four tubes were tested on my TV-7 tester where 56 is the required minimum and all four tubes had no leaks or shorts. Please, look at the above pictures for test scores as well as the overall cosmetic condition of each tube. Thanks For Looking! No International Shipping!!!

Up for auction is this strong testing match quad of black plate Westinghouse 12AU7 audio tubes. All four tubes would make a super nice addition to anyones collection or to use either one. All four tubes were tested on my TV-7 tester where 56 is the required minimum and all four tubes had no leaks or shorts. Please, look at the above pictures for test scores as well as the overall cosmetic condition of each tube. Thanks For Looking! No International Shipping!!!

Up for auction is this strong testing match quad of grey plate Baldwin 12AU7 audio tubes. All four tubes would make a super nice addition to anyones collection or to use either one. All four tubes were tested on my TV-7 tester where 56 is the required minimum and all four tubes had no leaks or shorts. Please, look at the above pictures for test scores as well as the overall cosmetic condition of each tube. Thanks For Looking! No International Shipping!!!

Up for auction is this strong testing match quad of black plate RCA 12AU7 audio tubes. All four tubes would make a super nice addition to anyones collection or to use either one. All four tubes were tested on my TV-7 tester where 56 is the required minimum and all four tubes had no leaks or shorts. Please, look at the above pictures for test scores as well as the overall cosmetic condition of each tube. Thanks For Looking! No International Shipping!!!

Up for auction is this strong testing match quad of grey plate General Electric 12AU7 audio tubes. All four tubes would make a super nice addition to anyones collection or to use either one. All four tubes were tested on my TV-7 tester where 56 is the required minimum and all four tubes had no leaks or shorts. Please, look at the above pictures for test scores as well as the overall cosmetic condition of each tube. Thanks For Looking! No International Shipping!!!

Up for auction is this strong testing quad of black plate RCA 12AT7 audio tubes. All four tubes would make a super nice addition to anyones collection or to use either one. All four tubes were tested on my TV-7 tester where 50 is the required minimum and all four tubes had no leaks or shorts. Please, look at the above pictures for test scores as well as the overall cosmetic condition of each tube. Thanks For Looking! No International Shipping!!!

Up for auction is this NOS/NIB strong testing quad of grey plate Phillips 12AT7WC audio tubes. All four tubes would make a super nice addition to anyones collection or to use either one. All four tubes were tested on my TV-7 tester where 50 is the required minimum and all four tubes had no leaks or shorts. Please, look at the above pictures for test scores as well as the overall cosmetic condition of each tube. Thanks For Looking! No International Shipping!!!

Up for sale : Beautiful NOS Matched QUAD Gold PIN VINTAGE USA MADE TUBESNOS Matched QUAD 5814A Sylvania Gold Pin NOS Tubes . High Quality ECC82 / 12AU7 / 12AU7WA WORKING EXCELLENT IN MINT CONDITION MADE WITH LOW NOISE SUPPORTS , GIANT D GETTERS & VERY THICK MICAS These 4 tubes are direct replacement for ECC802S Made with 3 Micas / Low Noise Supports for the best Tone Made in the USA. ALL 4 tubes made the exact same design You get the 4 tubes you see in the Photos for the Price. VERY HIGH GRADE VINTAGE TUBES EXACTLY MATCHED SET OF FOUR *QUAD

Tested Quad of 12BY7A RCA Audio Receiver Ham Radio Vacuum Tubes Country of origin: USA Production era: 1950s Model: 12BY7A Manufacturer: RCA Type: driver Plate type: black Base type: 9 pin Spacers: two Filaments: standard Getter frame: halo Getter flash: base Glass: shaded gray Stencils: very good Condition: very good minor variations Original cartons: included, very good condition Usage: minimal if any Quantity: 4 Please review the photos for more detail Test results: Excellent strong balanced test results for Gm: 11.5, 11.5, 12.5 and 13.0 For Gm, the suggested minimum value is: 5.5 Shorts: None detected For testing, a calibrated Triplett 3444A tester was used Compatibility: Suitable for vintage tube-based equipment ideal for use in tube amplifier power supplies and vintage audio / test equipment The tube will be carefully packed to ensure safe shipping Estimated delivery time within the USA is 3 to 7 business days Standard shipping service is US Postal 1st class Shipping is combined when applicable Please feel free to contact us if you require any additional information

4 nos 12au7 ecc82 toshiba japan audio tubes, rare dgetter black plates!legendary vintage hifidelity tone, two tight balanced pairs102/99 ~ 101/96 ~ 91/95 ~ 93/90 % gm ~cali acoustics~~see our other listings for alternate listening positions, bid/buy/best offer~ vintage hifidelity vacuum tube pro audio / warm bright lofi hifi tonecaliacoustics instagram (live) / caliacoustics dot com (soon)~preamps stereos vocals instruments mics rode k2/ntk audio technica at-4060 bluemics wooaudio liquidplatinum aesthetix cat audioresearch arc echo ear herron decco lector manley horizons conrad frontiers pathos marantz vac psaudiobhk + more apps~~ 6dj8 7dj8 6922 7308 / ecc88 pcc88 e88cc e188cc ~~ 12ax7 12au7 12at7 / ecc83 ecc82 ecc81 ~~ 6bq5 el84 ~ 6267 ef86 ~ 6aq8 ecc85 ~ 6ca7 el34 ~

4 nos 12au7 ecc82 toshiba japan audio tubeslegendary vintage hifidelity tone, balanced quad special series104/104 ~ 105/105 ~ 104/104 ~ 106/105 % gm ~cali acoustics~~see our other listings for alternate listening positions, bid/buy/best offer~ vintage hifidelity vacuum tube pro audio / warm bright lofi hifi tonecaliacoustics instagram (live) / caliacoustics dot com (soon)~preamps stereos vocals instruments mics rode k2/ntk audio technica at-4060 bluemics wooaudio liquidplatinum aesthetix cat audioresearch arc echo ear herron decco lector manley horizons conrad frontiers pathos marantz vac psaudiobhk + more apps~~ 6dj8 7dj8 6922 7308 / ecc88 pcc88 e88cc e188cc ~~ 12ax7 12au7 12at7 / ecc83 ecc82 ecc81 ~~ 6bq5 el84 ~ 6267 ef86 ~ 6aq8 ecc85 ~ 6ca7 el34 ~