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4 x 12BH7A Sylvania Tubes*Strong Tested Quad* #1

Ende: 08.08. 2023 03:29:58 am Dienstag
  • Zustand: Gebraucht
  • Preis: 93.37 EUR FESTPREIS
  • Status: nicht verkauft
  • Artikelnummer: 374815136493
  • Verkäufer: fng2u (6467|98.9%)
  • Verkäufertyp: Gewerblich (mit Basis Shop)
  • Ort: Morganville, New Jersey USA
  • Versand nach: US
  • Versandkosten: 26,71 EUR
  • bei ebay
  • Beschreibung

    4 x 12BH7A Sylvania Tubes Made in USA Grey The lettering is smudged/worn 4 Pictures per Quad Tested on Enhanced Triplett E3444 Laboratory tester prepared by Paul Hart of Rosewell Ga. See pictures for results Bogey(100%) = 3100/3100 micromhos @ 11.5/11.5 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, ___-10.5___Volts bias or Cathode resistance*What were your tubes tested at? I do combine S&H

4 x 12AU7 Sylvania Tubes*Black Plates-D*Super Strong Matched Quad*1954 #8

Ende: 07.08. 2023 19:24:25 am Montag
  • Zustand: Gebraucht
  • Preis: 93.37 EUR FESTPREIS
  • Status: nicht verkauft
  • Artikelnummer: 285383680062
  • Verkäufer: fng2u (6467|98.9%)
  • Verkäufertyp: Gewerblich (mit Basis Shop)
  • Ort: Morganville, New Jersey USA
  • Versand nach: Worldwide
  • Versandkosten: 26,49 EUR
  • bei ebay
  • Beschreibung

    4 x 12au7 Sylvania Tubes Made in USA Long Black Plates D getter 1954 codes **Rare tubes** The lettering is smudged/missing Tested on enhanced Triplet E3444 Laboratory Tester by Paul Hart of Roswell Ga. Results =2350/2420 micromhos @ 9.4/11.1 mA2250/2260 micromhos @ 9.2/9.0 mA2330/2300 micromhos @ 10.9/10.0 mA2350/2370 micromhos @ 10.1/10.6 mA Bogey(100% or New) = 2200/2200 micromhos @ 10.0/10.0 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, ___-8.5___Volts bias or Cathode resistance*What were your tubes tested at? ***I do combine Shipping***

4 x 12BH7A Sylvania Tubes*Strong Tested Quad* #2

Ende: 07.08. 2023 19:24:23 am Montag
  • Zustand: Gebraucht
  • Preis: 93.37 EUR FESTPREIS
  • Status: nicht verkauft
  • Artikelnummer: 285383799884
  • Verkäufer: fng2u (6467|98.9%)
  • Verkäufertyp: Gewerblich (mit Basis Shop)
  • Ort: Morganville, New Jersey USA
  • Versand nach: US
  • Versandkosten: 26,71 EUR
  • bei ebay
  • Beschreibung

    4 x 12BH7A Sylvania Tubes Made in USA Grey The lettering is smudged/worn 4 Pictures per Quad Tested on Enhanced Triplett E3444 Laboratory tester prepared by Paul Hart of Rosewell Ga. See pictures for results Bogey(100%) = 3100/3100 micromhos @ 11.5/11.5 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, ___-10.5___Volts bias or Cathode resistance*What were your tubes tested at? I do combine S&H

4 x 12AU7 Sylvania Tubes*Black Plates-D*Super Strong Matched Quad*1950s #7

Ende: 07.08. 2023 19:24:21 am Montag
  • Zustand: Gebraucht
  • Preis: 93.37 EUR FESTPREIS
  • Status: nicht verkauft
  • Artikelnummer: 374814991131
  • Verkäufer: fng2u (6467|98.9%)
  • Verkäufertyp: Gewerblich (mit Basis Shop)
  • Ort: Morganville, New Jersey USA
  • Versand nach: Worldwide
  • Versandkosten: 24,19 EUR
  • bei ebay
  • Beschreibung

    4 x 12au7 Sylvania Tubes Made in USA Long Black Plates D getter 1950s production **Rare tubes** The lettering is smudged/missing Tested on enhanced Triplet E3444 Laboratory Tester by Paul Hart of Roswell Ga. Results =2320/2330 micromhos @ 10.9/10.1 mA2320/2340 micromhos @ 10.4/10.9 mA2200/2260 micromhos @ 9.0/9.9 mA2220/2230 micromhos @ 9.1/8.9 mA Bogey(100% or New) = 2200/2200 micromhos @ 10.0/10.0 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, ___-8.5___Volts bias or Cathode resistance*What were your tubes tested at? ***I do combine Shipping***

Strong Testing Quad Of Black Plate Tung-Sol 12AT7 Audio Tubes

Ende: 06.08. 2023 23:10:33 am Sonntag
  • Zustand: Gebraucht
  • Preis: 18.38 EUR Auktion
  • Status: verkauft
  • Artikelnummer: 364399339238
  • Anzahl Gebote: 1
  • Verkäufer: gobig4303 (349|99.1%)
  • Verkäufertyp: Privat
  • Ort: Ooltewah, Tennessee USA
  • Versand nach: US
  • Versandkosten: 27,35 EUR
  • bei ebay
  • Beschreibung

    Strong Testing Quad Of Black Plate Tung-Sol 12AT7 Audio TubesUp for auction is this very strong testing quad of black plate Tung-Sol 12AT7 audio tubes. Both tubes would make a super nice addition to anyones collection or to use either one. Both tubes were tested on my TV-7 tester where 50 is the required minimum and both 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!!!

4 x 12au7a Sylvania/Conn Tubes*Grey-O*Super Strong Matched Quad*1964*#3

Ende: 06.08. 2023 22:17:18 am Sonntag
  • Zustand: Gebraucht
  • Preis: 46.68 EUR FESTPREIS
  • Status: nicht verkauft
  • Artikelnummer: 285383614045
  • Verkäufer: fng2u (6467|98.9%)
  • Verkäufertyp: Gewerblich (mit Basis Shop)
  • Ort: Morganville, New Jersey USA
  • Versand nach: Worldwide
  • Versandkosten: 23,35 EUR
  • bei ebay
  • Beschreibung

    4 x 12AU7A Sylvania Tubes Made in USA for Conn Long Grey plates O getter Lettering may be smudged/missing Matching codes 312-452 = 1964 The auction is for 4 tubes Tested on Enhanced Tripplet E3444 Laboratry Tester prepared by Paul Hart Results = 2600/2530 micromhos @ 11.7/11.0 mA 2690/2550 micromhos @ 13.4/11.0 mA2590/2460 micromhos @ 11.2/10.3 mA 2520/2560 micromhos @ 11.6/11.8 mA Bogey(100% or new) = 2200/2200 micromhos @ 10.0/10.0 mA +/- 10% I do combine S&H READ THIS: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 trans-conductance (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, ___-8.5___Volts bias or Cathode resistance* Most other testers CANNOT test tubes using the proper specifications and make up their own test results What were your tubes tested at?

4 x 12au7a Sylvania/Conn Tubes*Grey-O*Super Strong Matched Quad*1964*#6

Ende: 06.08. 2023 22:17:16 am Sonntag
  • Zustand: Gebraucht
  • Preis: 46.68 EUR FESTPREIS
  • Status: nicht verkauft
  • Artikelnummer: 374814931715
  • Verkäufer: fng2u (6467|98.9%)
  • Verkäufertyp: Gewerblich (mit Basis Shop)
  • Ort: Morganville, New Jersey USA
  • Versand nach: Worldwide
  • Versandkosten: 23,35 EUR
  • bei ebay
  • Beschreibung

    4 x 12AU7A Sylvania Tubes Made in USA for Conn Long Grey plates O getter Lettering may be smudged/missing Matching codes 312-439 = 1964 The auction is for 4 tubes Tested on Enhanced Tripplet E3444 Laboratry Tester prepared by Paul Hart Results = 2500/2560 micromhos @ 11.5/11.8 mA 2500/2620 micromhos @ 11.8/12.5 mA2570/2590 micromhos @ 11.1/11.8 mA 2500/2480 micromhos @ 11.2/11.8 mA Bogey(100% or new) = 2200/2200 micromhos @ 10.0/10.0 mA +/- 10% I do combine S&H READ THIS: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 trans-conductance (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, ___-8.5___Volts bias or Cathode resistance* Most other testers CANNOT test tubes using the proper specifications and make up their own test results What were your tubes tested at?

4 x JG-5814A(12au7)GE Tubes*Grey Plate*Very Strong Matched Quad*Mil Specs*

Ende: 06.08. 2023 22:17:15 am Sonntag
  • Zustand: Gebraucht
  • Preis: 74.7 EUR FESTPREIS
  • Status: nicht verkauft
  • Artikelnummer: 374814962111
  • Verkäufer: fng2u (6467|98.9%)
  • Verkäufertyp: Gewerblich (mit Basis Shop)
  • Ort: Morganville, New Jersey USA
  • Versand nach: Worldwide
  • Versandkosten: 26,15 EUR
  • bei ebay
  • Beschreibung

    4 x JG-5814(12au7) GE Tubes Made in USA Military Specs Foil O getters The lettering is smudged/missing Tested on enhanced Triplet E3444 Laboratory Tester 2110/2050 micromhos @ 9.3/ 8.9 mA 2000/2080 micromhos @ 9.3/ 9.8 mA 2120/2090 micromhos @ 10.7/10.6 mA 2000/1960 micromhos @ 9.0/ 9.4 mA Bogey(100%) = 2200/2200 micromhos @ 10.0/10.0 mA +/- 10% ***Ask any questions before buying,not after*** 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, ___-8.5___ Volts BiasWhat were your tubes tested at? I do combine shipping

4 x 12au7a Sylvania/Conn Tubes*Grey-O*Super Strong Matched Quad*1964*#2

Ende: 06.08. 2023 22:17:15 am Sonntag
  • Zustand: Gebraucht
  • Preis: 46.68 EUR FESTPREIS
  • Status: nicht verkauft
  • Artikelnummer: 374814931714
  • Verkäufer: fng2u (6467|98.9%)
  • Verkäufertyp: Gewerblich (mit Basis Shop)
  • Ort: Morganville, New Jersey USA
  • Versand nach: Worldwide
  • Versandkosten: 23,35 EUR
  • bei ebay
  • Beschreibung

    4 x 12AU7A Sylvania Tubes Made in USA for Conn Long Grey plates O getter Lettering may be smudged/missing Matching codes 312-452 = 1964 The auction is for 4 tubes Tested on Enhanced Tripplet E3444 Laboratry Tester prepared by Paul Hart Results = 2450/2580 micromhos @ 10.2/13.2 mA 2530/2530 micromhos @ 11.9/10.9 mA2430/2500 micromhos @ 10.2/12.7 mA 2500/2450 micromhos @ 10.8/11.6 mA Bogey(100% or new) = 2200/2200 micromhos @ 10.0/10.0 mA +/- 10% I do combine S&H READ THIS: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 trans-conductance (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, ___-8.5___Volts bias or Cathode resistance* Most other testers CANNOT test tubes using the proper specifications and make up their own test results What were your tubes tested at?

4 x 12au7a Sylvania/Conn Tubes*Grey-O*Super Strong Matched Quad*1964*#1

Ende: 06.08. 2023 22:17:14 am Sonntag
  • Zustand: Gebraucht
  • Preis: 46.68 EUR FESTPREIS
  • Status: nicht verkauft
  • Artikelnummer: 285383614046
  • Verkäufer: fng2u (6467|98.9%)
  • Verkäufertyp: Gewerblich (mit Basis Shop)
  • Ort: Morganville, New Jersey USA
  • Versand nach: Worldwide
  • Versandkosten: 23,35 EUR
  • bei ebay
  • Beschreibung

    4 x 12AU7A Sylvania Tubes Made in USA for Conn Long Grey plates O getter Lettering may be smudged/missing Matching codes 312-452 = 1964 The auction is for 4 tubes Tested on Enhanced Tripplet E3444 Laboratry Tester prepared by Paul Hart Results = 2370/2400 micromhos @ 9.8/10.8 mA 2320/2300 micromhos @ 9.6/ 9.2 mA2340/2370 micromhos @ 9.8/9.4 mA 2370/2380 micromhos @ 9.7/9.9 mA Bogey(100% or new) = 2200/2200 micromhos @ 10.0/10.0 mA +/- 10% I do combine S&H READ THIS: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 trans-conductance (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, ___-8.5___Volts bias or Cathode resistance* Most other testers CANNOT test tubes using the proper specifications and make up their own test results What were your tubes tested at?

4 x 12AU7A GE/Hammond Tubes*Short Plates*Strong Quad*(3 Offers Avail)

Ende: 06.08. 2023 22:17:14 am Sonntag
  • Zustand: Gebraucht
  • Preis: 46.68 EUR FESTPREIS
  • Status: nicht verkauft
  • Artikelnummer: 285383614049
  • Verkäufer: fng2u (6467|98.9%)
  • Verkäufertyp: Gewerblich (mit Basis Shop)
  • Ort: Morganville, New Jersey USA
  • Versand nach: Worldwide
  • Versandkosten: 23,35 EUR
  • bei ebay
  • Beschreibung

    4 x 12AU7A GE Tubes Made in USA for Hammond Short Grey plates with small O getter The auction is for 4 tubes and there are 3 offers available ***Ask any questions before buying,not after*** Tested on enhanced Triplet E3444 Laboratory Tester #1 = Sold 2090/1850 micromhos @ 9.4/8.9 mA 1990/1750 micromhos @ 8.8/7.2 mA 2170/1720 micromhos @ 9.3/8.2 mA 1760/1740 micromhos @ 7.2/8.2 mA #22010/1800 micromhos @ 8.8/8.6 mA1830/1850 micromhos @ 8.1/8.9 mA1940/1880 micromhos @ 7.8/8.8 mA1930/1700 micromhos @ 8.9/8.5 mA #31970/1450 micromhos @ 9.3/7.7 mA2120/1880 micromhos @ 8.2/10.0 mA1820/1970 micromhos @ 7.8/9.2 mA1970/1920 micromhos @ 8.9/9.8 mA Bogey(100%) = 2200/2200 micromhos @ 10.0/10.0 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, ___-8.5___ Volts BiasWhat were your tubes tested at? I do combine shipping

VINTAGE QUAD TELEFUNKEN 12AX7 ECC83 AMP TUBES DATE MATCHED

Ende: 06.08. 2023 21:31:34 am Sonntag
  • Zustand: Gebraucht
  • Preis: 442.03 EUR FESTPREIS
  • Status: verkauft
  • Artikelnummer: 374758205111
  • Verkäufer: natharri-7769 (113|100.0%)
  • Verkäufertyp: Privat
  • Ort: Belchertown, Massachusetts USA
  • Versand nach: US
  • Versandkosten: 27,77 EUR
  • bei ebay
  • Beschreibung

    THIS IS A VERY NICE QUAD OF TELEFUNKEN 12AX7 AMP TUBES. DATE MATCHED ef FOR MAY 1962. ALL TEST STRONG FOR QUALITY ON A BK606 TESTER. LOOK AT PAINT IS PRETTY GOOD FOR TELEFUNKEN. MADE IN WESTERN GERMANY. RIBBED LONG PLATE ALL HAVE DIAMOND ON THE BOTTOM

Self-Made Vacuum Tube Preamp Quad 22 Type

Ende: 06.08. 2023 05:46:13 am Sonntag
  • Zustand: Gebraucht
  • Preis: 889.53 EUR FESTPREIS
  • Status: nicht verkauft
  • Artikelnummer: 115856231373
  • Verkäufer: dr_nine (1214|98.3%)
  • Verkäufertyp: Gewerblich (mit Basis Shop)
  • Ort: Japan Japan
  • Versand nach: Worldwide
  • Versandkosten: 128,3 EUR
  • bei ebay
  • Beschreibung

    Self-Made Vacuum Tube Preamp Quad 22 TypeThis product data sheet is originally written in English.PaymentRest assured that our store offers a variety of payment methods.Please pay within 5 days after auction is finished.About UsWe are located in Japan.For electrical products, check the manufacturer and product and convert to the voltage of each country.We plan to ship by FedEx or DHL.Please contact us as the shipping fee can be changed in some cases. Its our pleasure to make you happy by proposing our recommend item.If you have any questions or request about items, please feel free to ask us.International Buyers - Please Note:-Import duties, taxes, and charges are not included in the item price or shipping charges. These charges are the buyers responsibility.-Please check with your countrys customs office to determine what these additional costs will be prior to bidding/buying.-These charges are normally collected by the delivering freight (shipping) company or when you pick the item up - do not confuse them for additional shipping charges.-We do not mark merchandise values below value or mark items as - gifts - The US and International government regulations prohibit such behavior.]]>We are located in Japan.For electrical products, check the manufacturer and product and convert to the voltage of each country.We plan to ship by FedEx or DHL.Please contact us as the shipping fee can be changed in some cases. -Import duties, taxes, and charges are not included in the item price or shipping charges. These charges are the buyers responsibility. -Please check with your countrys customs office to determine what these additional costs will be prior to bidding/buying. -These charges are normally collected by the delivering freight (shipping) company or when you pick the item up - do not confuse them for additional shipping charges. -We do not mark merchandise values below value or mark items as - gifts - The US and International government regulations prohibit such behavior. Unit Quantity NA Unit Type NA MPN NA Country Japan Brand No Brand UPC NA Country/Region of Manufacture NA California Prop 65 Warning NA Model NA Type NA

Self-Made Aspirateur Tube Préamp Quad 22 Type

Ende: 06.08. 2023 05:46:13 am Sonntag
  • Zustand: Gebraucht
  • Preis: 892.75 EUR FESTPREIS
  • Status: nicht verkauft
  • Artikelnummer: 115856231416
  • Verkäufer: dr_nine (1214|98.3%)
  • Verkäufertyp: Gewerblich (mit Basis Shop)
  • Ort: Japan Japan
  • Versand nach: Worldwide
  • Versandkosten: 127,78 EUR
  • bei ebay
  • Beschreibung

    Self-Made Aspirateur Tube Préamp Quad 22 TypeCette fiche produit est originalement écrite en anglais. Veuillez trouver ci dessous une traduction automatique en français. Si vous avez des questions veuillez nous contacter.PaiementSoyez assuré que notre magasin offre une variété de méthodes de paiement.Veuillez payer dans les 5 jours suivant la fin de lenchère.À proposNous sommes situés au Japon. Pour les produits électriques, vérifiez le fabricant et le produit et convertissez-les à la tension de chaque pays. Nous prévoyons dexpédier par FedEx ou DHL. Veuillez nous contacter car les frais dexpédition peuvent être modifiés dans certains cas. Cest avec plaisir que nous vous ferons plaisir en vous proposant notre article recommandé.Si vous avez des questions ou des demandes concernant des articles, nhésitez pas à nous les demander.Acheteurs internationaux - Veuillez noter :-Les droits dimportation, les taxes et les frais ne sont pas inclus dans le prix de larticle ou les frais dexpédition. Ces charges sont sous la responsabilité de lacheteur.-Veuillez vérifier auprès du bureau de douane de votre pays pour déterminer quels seront ces coûts supplémentaires avant denchérir/acheter.-Ces frais sont normalement perçus par la société de livraison de fret (expédition) ou lorsque vous récupérez larticle - ne les confondez pas avec des frais dexpédition supplémentaires.-Nous ne marquons pas les valeurs des marchandises en dessous de la valeur ou ne marquons pas les articles comme - des cadeaux - Les réglementations gouvernementales américaines et internationales interdisent un tel comportement.]]>Nous sommes situés au Japon. Pour les produits électriques, vérifiez le fabricant et le produit et convertissez-les à la tension de chaque pays. Nous prévoyons dexpédier par FedEx ou DHL. Veuillez nous contacter car les frais dexpédition peuvent être modifiés dans certains cas. -Les droits dimportation, les taxes et les frais ne sont pas inclus dans le prix de larticle ou les frais dexpédition. Ces charges sont sous la responsabilité de lacheteur. -Ces frais sont normalement perçus par la société de livraison de fret (expédition) ou lorsque vous récupérez larticle - ne les confondez pas avec des frais dexpédition supplémentaires. -Nous ne marquons pas les valeurs des marchandises en dessous de la valeur ou ne marquons pas les articles comme - des cadeaux - Les réglementations gouv Unit Quantity NA Unit Type NA MPN NA Country Japan Brand No Brand UPC NA Country/Region of Manufacture NA California Prop 65 Warning NA Model NA Type NA

4 x 12AX7 Sylvania Tubes*Long Plates-O*Very Strong Quad*1965

Ende: 05.08. 2023 18:23:46 am Samstag
  • Zustand: Gebraucht
  • Preis: 131.76 EUR FESTPREIS
  • Status: nicht verkauft
  • Artikelnummer: 374800656481
  • Verkäufer: fng2u (6465|98.9%)
  • Verkäufertyp: Gewerblich (mit Basis Shop)
  • Ort: Morganville, New Jersey USA
  • Versand nach: US
  • Versandkosten: 28,19 EUR
  • bei ebay
  • Beschreibung

    4 x 12AX7 Sylvania Tubes Made in USA Long Ribbed plates O getter The lettering is smudged/worn/missing The auction is for 4 tubes Tested on Enhanced Triplet E3444 Laboratory Tester prepared by Paul Hart of Ga. Results =1640/1950 micromhos @ 1.02 & 1.35 mA 1880/1650 micromhos @ 1.28 & 1.03 mA1580/1640 micromhos @ .96 & 1.03 mA 1880/1580 micromhos @ 1.36 & 1.03 mA Bogey (100% or New) = 1600/1600 micromhos @ 1.2/1.2 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, ___-2.0___Volts bias or Cathode resistance*What were your tubes tested at? I do combine shipping

4 x 12AX7 Sylvania Tubes*Long Plates-O*Very Strong Quad*1960s

Ende: 05.08. 2023 18:23:45 am Samstag
  • Zustand: Gebraucht
  • Preis: 109.8 EUR FESTPREIS
  • Status: nicht verkauft
  • Artikelnummer: 285371446996
  • Verkäufer: fng2u (6465|98.9%)
  • Verkäufertyp: Gewerblich (mit Basis Shop)
  • Ort: Morganville, New Jersey USA
  • Versand nach: US
  • Versandkosten: 27,77 EUR
  • bei ebay
  • Beschreibung

    4 x 12AX7 Sylvania Tubes Made in USA Long Ribbed plates O getter The lettering is smudged/worn/missing The auction is for 4 tubes Tested on Enhanced Triplet E3444 Laboratory Tester prepared by Paul Hart of Ga. Results =1550/1650 micromhos @ .98 & 1.08 mA 1720/1570 micromhos @ 1.35 & 1.20 mA1630/1410 micromhos @ 1.19 & .84 mA1380/1520 micromhos @ .89 & 1.01 mA Bogey(100% or New) = 1600/1600 micromhos @ 1.2/1.2 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, ___-2.0___Volts bias or Cathode resistance*What were your tubes tested at? I do combine shipping

Matched Quad - Svetlana OTK 6L6GC Tubes / 9712 -- KT

Ende: 05.08. 2023 05:30:59 am Samstag
  • Zustand: Gebraucht
  • Preis: 164.01 EUR FESTPREIS
  • Status: verkauft
  • Artikelnummer: 334914305852
  • Verkäufer: speakerguy2002 (22718|99.9%)
  • Verkäufertyp: Gewerblich (mit Basis Shop)
  • Ort: Port Charlotte, Florida USA
  • Versand nach: US
  • Versandkosten: 27,25 EUR
  • bei ebay
  • Beschreibung

    Svetlana 6L6GC This listing is for a matched Quad of Svetlana 6L6 Tubes. Make: SvetlanaTube Number: 6L6GCDate Code: 9712 (all the same)Condition: Tested StrongQuantity: 4 Matched Tubes Thanks for looking!!

Quad of RCA JRC 12AX7 Black Plate 1951/1952 D-getter Vacuum Tubes - 10% matched

Ende: 04.08. 2023 14:15:20 am Freitag
  • Zustand: Gebraucht
  • Preis: 366.02 EUR FESTPREIS
  • Status: nicht verkauft
  • Artikelnummer: 325726395580
  • Verkäufer: tubetroniks (5501|100.0%)
  • Verkäufertyp: Gewerblich (mit Basis Shop)
  • Ort: Ashland, Oregon USA
  • Versand nach: Worldwide
  • Versandkosten: 17,35 EUR
  • bei ebay
  • Beschreibung

    Scarce quad of early military-qualified RCA JRC 12AX7 black plate tubes. These feature D getters, which were used only on versions from the early 50s (instead of the post-54 square getters). Matched to about 10% difference across all tubes. Visible 1952 and 1951 date codes on two tubes (the code on the others has been rubbed off, but should be very close). Pay no attention to the numbers written on the tube tops, as shown in the pictures. They were marked by a previous owner and are not accurate test results. I ship worldwide directly via USPS and UPS. Buyers from mainland China and Italy: please contact me for shipping cost. Orders within the US now ship for free via USPS Priority Mail! NumberJRC 12AX7Brand on tubeRCAActual manufacturerRCACountry of manufactureUSADate codes2-48, 1-??, N/A, N/ABox typeWhite boxPlate styleBlackGetter styleTop-DGlass styleClearBase style9-pin miniatureTest results (Gm in umhos)950/900 & 900/1000 & 900/1000 & 1000/1000 typical NOS is 1250/1250 Be sure to read my policies below, and contact me before you purchase if you have any questions. I have over 30 years of experience as an electronics engineer, certified electronics technician, and hobbyist, and have been collecting, buying, and selling tubes since the 1980s. Ive been an eBay seller since February of 2000. This is the only seller account I have on eBay and the pictures you see are of the actual tube(s) you’ll receive. Tubes are described, tested, and presented to the best of my ability, subject to the limitations of the equipment that I have available (Hickok 539C and 6000A). Test results are likely to differ between your equipment and mine due to many factors. Tubes are not tested for noise or microphonics. Do you have tubes to sell? Contact me with your inventory!Return Policy Unless otherwise stated in this listing, tubes may be returned within 30 days for a refund. Please keep in mind that while I do allow returns, my purpose here is to sell tubes, not to loan tubes for rolling. Any tube to be returned must: a) still bear my identification stamp. b) be in EXACTLY the same condition in which it arrived to you. Things which may invalidate a return: defaced or smudged print on the glass, bases scratched from retainer springs, cracked or damaged glass, damaged or missing boxes (where original boxes were sent with the tubes), and electrical or physical degradation from improper operation or handling. Returns which do not meet the above criteria may be refused or may be subject to partial refund. Ebays return guidelines prohibit “using or damaging an item and then returning it.” I pay for return shipping on all returns within the USA, regardless of reason. You pay for return shipping if you are located outside of the USA. If the tube arrives to you DOA or significantly not as described (SNAD) I pay for return shipping. I do not pay for return shipping for any other reason. If a tube is returned as DOA or SNAD, but does not test as such upon return, I reserve the right to be reimbursed for any return shipping cost that I paid. International buyers, please note: Import fees and taxes which you pay to your border and/or customs agency are not refundable by me under ANY conditions or for ANY reason, regardless of the reason for your return. Shipping Your tubes will be professionally prepared for shipping using all-new packing materials and will arrive to you in perfect condition. Ive been shipping tubes for many years and know how to get them to you quickly and securely. International orders ship with proper customs documentation and tariff codes to ensure that theyre processed with minimal delay upon arrival in the destination country. DOMESTIC: Unless otherwise noted, free shipping via USPS Priority Mail is offered on all tubes purchased with Buy-It-Now. Other services are available at additional cost. If you prefer a shipping method that is not listed, please contact me prior to purchasing. I can usually ship via any USPS, FedEx, or UPS method that is applicable to your ZIP code. If you need expedited shipping (Express, Next Day, etc.) please contact me first to confirm earliest available date of shipment, as cutoff times are generally early in the afternoon. INTERNATIONAL: USPS First Class Mail: This is the least expensive option but the availability of tracking is limited in many cases. Its available worldwide for packages with a value of USD$400 or less. Be aware that First Class Mail has been known to take up to three months to reach some destinations. Customs delays are also more common with First Class. If you select the First Class option I expect that you will be patient and wait three months before requesting a refund for “item not received.” If you require faster delivery please select an option below. USPS Priority Mail: This option is available for shipments with a value less than USD$1000. It typically takes a couple of weeks to reach most destinations. UPS Worldwide Expedited: This option is available worldwide for all shipments, and is required for shipments valued at USD$1000 or more. It is fast and reliable, with end-to-end tracking. I can also usually arrange shipping with other carriers at additional cost. Please inquire before purchasing if you have specific requests. I ship to China and Italy only via UPS Worldwide Expedited, regardless of value. No exceptions. Orders valued in excess of USD$2000 may be shipped in multiple packages. Dont put too much faith in eBay delivery estimates for international shipments. They are often wrong by a considerable amount. I dont use eBays Global Shipping Program (GSP) because they treat tubes as hazardous material and will confiscate them.USPS is now requiring that all addresses be in “Latin” (abcdefg) characters (this means, for example, no Cyrillic (???????) or Chinese (???), etc.). USPS will return to the me any packages which violate this guideline, and the buyer will then be required to correct the address and pay postage again. Ebay places the burden of safe delivery on sellers, so I fully insure all shipments sent outside of the USA, regardless of value. Because I can insure only up to the declared value, ALL SHIPMENTS ARE DECLARED AT ACTUAL VALUE. You might owe significant import fees on higher value shipments once they cross your countrys border – check with your border or customs agency for details. I can ship to a domestic freight forwarder or other third party within the USA, provided their address is on the order at the time you place it. GENERAL: SIGNATURE REQUIREMENT: All orders valued at USD$750 or greater, and ANY order shipped via UPS or FedEx, automatically require a signature release upon delivery. Someone at your delivery address will need to be available at the time of delivery to sign for the package. COMBINED SHIPPING: Im happy to combine shipping on multiple purchases. Those shipping within the US will combine automatically. International orders must be manually combined after the purchase, and any excess shipping will be refunded to your payment source (due to the way eBay buy-it-now items are set up, this is the only way I can combine shipping on more than one item). HANDLING TIME: My handling time is one business day and eBay requires me to ship within that timeframe. I cannot withhold shipment for a later date. If you require shipment on a specific date I can often set up a special listing just for you on that date; please inquire. I usually ship every day of the week, except for Sunday and USPS-observed holidays, and orders often ship same day. Orders placed later in the day usually ship next business day. Orders placed on Friday or Saturday will sometimes not ship until Monday. All orders placed on Sunday or USPS-observed holidays ship the next business day. Expedited and express shipments (FedEx and UPS 2-day & Next Day, etc) must be placed by 12PM Pacific Time in order to ship same day. If you have an urgent delivery need its a good idea to contact me first so I can confirm exact day of shipment. SHIP-TO ADDRESS: Ebay requires that I ship to the address on the order. This protects both you and me. I cannot ship to a different address. If you require shipment to a different address please update your shipping information before making a purchase. R30

Quad 4 Tubes Jackson EL34 / 6CA7 Vacuum Tubes - Amplifier Tubes - #2

Ende: 02.08. 2023 23:17:46 am Mittwoch
  • Zustand: Neu: Sonstige
  • Preis: 130.67 EUR FESTPREIS
  • Status: nicht verkauft
  • Artikelnummer: 175736058672
  • Verkäufer: deals2smile4 (10873|99.9%)
  • Verkäufertyp: Gewerblich (mit Basis Shop)
  • Ort: Fort Worth, Texas USA
  • Versand nach: US
  • Versandkosten: 28,72 EUR
  • bei ebay
  • Beschreibung

    Quad 4 Tubes Jackson EL34 / 6CA7 Vacuum Tubes - Amplifier Tubes -. # 2 You will receive the exact same tubes that you see in the photos. You can be rest assured that your item will be packaged for protection in transit to you utilizing proper boxes, foam roll and bubble wrap when necessary. Peace ????? of mind promise that will make you Smile ; ) Multipoint Inspection and cleaning ; ) ?We know how important it is for your products to arrive cleaned and fully functioning according to our photos and description. All of our products are cleaned and sanitized prior to being introduced to our customers. We take the time to gather the data from all of our products with running rigorous test on all of our electronics to ensure they are accurately represented, wether it is fully function, or it is being sold as is and not working as stated in the description. Some products may be refurbished @ Deals2Smile4 Headquarters that we will note in detail of what services that were performed. Shipping ; ) ?We will guarantee professional shipping that will protect your items with high quality materials that include the following (based on the merchandise we are shipping and not limited to) - Heavy Duty Boxes, Protective Film, Bubble Wrap, Foam Cushions, Foam Blocks, Peanuts, Packing Paper, Bubble Mailers, Corner Guards, Double Boxing and etc. We guarantee that we will have your items shipped on time, and if for some reason your item is hung up somewhere or tracking is not updating for some reason, please feel free to reach out so we can find the answers together. If your package/box arrives and it appears to be damaged physically or by sound, please reach out to us immediately and take photos of the packaging so we are able address the situation with the postal service right away. It is very important to us that your package arrives to you safe and sound ; ) Recycle ?? ?We strive do our very best at doing our part when it comes to repurposing and recycling with materials for shipping our products. We may at times use news paper, magazine pages, paper, random branded boxes, foam cut outs and etc. The good thing is, we will NEVER sacrifice the quality of the shipping and handling! We want all of our wonderful customers to ALWAYS smile ???? when they open their purchased products. Return Policy : ) ?We guarantee that all of our products are always listed with the 100% intent of being as accurate as we possibly can. There is always a possibility of a typo or a an error that can potentially be made on our end without the intent of doing so. We are in the business of making it right for our customer and will always do everything possible to ensure we fulfill our promise of standing behind our products and how they are described with photos and descriptions. Please refer to your particular item you are purchasing for the return policy that would either be; No Returns Accepted or a 30 Day Return Policy with buyer paying for return shipping if item was accurately described. If item is not functioning or not as described, please reach out prior to opening a return so we are able to assist in finding a solution based on our collective findings. ???? - Feel free to reach out to us if you have any questions or if you are looking ???? for anything in particular! Thank you for choosing Deals2Smile4 : ) FOLLOW US AND GET EXCLUSIVE COUPONS! P.S. We also offer combined shipping for multiple item purchases!

MATCHED QUAD 7025 Burroughs SYLVANIA 12ax7a Tube BOGEN AMP No microphonics

Ende: 02.08. 2023 10:07:48 am Mittwoch
  • Zustand: Gebraucht
  • Preis: 111.39 EUR FESTPREIS
  • Status: nicht verkauft
  • Artikelnummer: 186005680264
  • Verkäufer: tubesradios (4736|100.0%)
  • Verkäufertyp: Gewerblich (mit Basis Shop)
  • Ort: Morriston, Florida USA
  • Versand nach: US
  • Versandkosten: 27,37 EUR
  • bei ebay
  • Beschreibung

    1952RARE!MATCHED QUADSYLVANIA (For Burroughs Corporation) 7025 12AX7A 12AX7 ECC83 TALL GREY Ribbed PLATES O GetterTube BOGEN AMP Tested - No microphonics TV-7/u Tested Condition Report: ** Tubes TESTED AND sounded good in my BOGEM AMP! No microphonics! ** ** I WILL COMBINE SHIPPING COST ON M Tested to be in guaranteed working conditionI tested these on a High Quality Professonal Hickok TV-7/U Tester:TUBEs TEST RESULTs: Tube #1 : 78/75 - {Minimum Rating of 32/32 for TV-7 Testers are equal to 65% of average new ratings.}Tube #2 : 76/70 - {Minimum Rating of 32/32 for TV-7 Testers are equal to 65% of average new ratings.}Tube #3 : 73/65 - {Minimum Rating of 32/32 for TV-7 Testers are equal to 65% of average new ratings.}Tube #4 : 66/66 - {Minimum Rating of 32/32 for TV-7 Testers are equal to 65% of average new ratings.}If you have Questions or Comments contact me on eBay Check out the photos! TESTED WITH a (TV-7/U) FOR GAS, SHORTS, AND MUTUAL CONDUCTANCE AND ARE MOSTLY STRONG TUBES! I Combine Y ITEMS!!! ** ShippingBefore You Pay. I accept PayPal and Postal M O.Please see click to enlarge photos for condition and quality.Check out My Other Items For Sale!WILL BE SHIPPED OUT FAST! Before bidding please read my shipping and return policy. I WILL COMBINE SHIPPING COST ON MY ITEMS!!! NOTE: International buyers - THE BUYER IS RESPONSIBLE FOR SHIPPING FEES. INTERNATIONAL BIDS WELCOME. I WONT CHANGE DECLARED VALUE ON CUSTOM FORMS AND INTERNATIONAL BUYERS ARE RESPONSIBLE FOR ALL TAXES, CUSTOM FEES, and additional shipping fees. ANY RETURN WILL BE ACCEPTED BUT BUYER WILL PAY SHIPPING FEES AND I WILL NOT REFUND ANY SHIPPING FEES.*TESTED ON Calibrated HICKOK TV-7 B/U*{Minimum Ratings for TV-7 Testers are equal to 65% of average new ratings.}ALL tubes will be ran through a Daniel Nelson calibrated HICKOK TV-7 B/U for a full mutual conductance test. This is a world class tester that is calibrated by the Hickok doctor. Its test results are dead on and you can buy with confidence. If you want to know what the exact Gm rating of the tube is please message me. My Return Policy: Will not accept returns for reasons such as ordered the wrong item, change mind, not what I thought It was, wrong color ordered, item ordered.

842 50 VT-50 45 10 RCA Power Output Triode Tube DHT Matched Quad! RV239

Ende: 01.08. 2023 12:15:16 am Dienstag
  • Zustand: Gebraucht
  • Preis: 1980.64 EUR FESTPREIS
  • Status: nicht verkauft
  • Artikelnummer: 314655785794
  • Verkäufer: kruzhka (2711|100.0%)
  • Verkäufertyp: Privat
  • Ort: Riga, default Lettland
  • Versand nach: Worldwide
  • Versandkosten: 23,45 EUR
  • bei ebay
  • Beschreibung

    You are bidding for 4 pieces (full quad) beautiful CRC842 DHT triodes from RCA. Tungsten filament triodes like 10, but with lower internal resistance. These are close to 50, but without grid problems. Excellent choice for low power output amplifier. Tubes were tested on Funke W19 tube tester. Test settings were 100V plate and grounded grid. Tubes showed 18.5, 18.5, 18.5, ? 19 ?? current. Check actual photos for details. Private selling. I’ll prepare good package and post worldwide, but will not assuming responsibility for tube damage during postage due age and gently specific. Payment should be done within 3 days. Bid accordingly with posted above. Contact seller for any questions. Check my other power tube auctions. Happy bidding. Dont loose opportunity.

4 x 12au7a Hytron/Hammond Tubes*Black Plt-O*Super Strong Matched Quad*1960*#1

Ende: 01.08. 2023 00:30:04 am Dienstag
  • Zustand: Gebraucht
  • Preis: 72.57 EUR FESTPREIS
  • Status: nicht verkauft
  • Artikelnummer: 285318347891
  • Verkäufer: fng2u (6439|98.9%)
  • Verkäufertyp: Gewerblich (mit Basis Shop)
  • Ort: Morganville, New Jersey USA
  • Versand nach: US
  • Versandkosten: 27,64 EUR
  • bei ebay
  • Beschreibung

    4 x 12AU7a Hytron Tubes Made in USA for Hammond Short Black plates O getter Lettering may smudged/missing Codes = 1960 The auction is for 4 tubes Tested on Enhanced Tripplet E3444 Laboratry Tester prepared by Paul Hart Results = 2400/2420 micromhos @ 12.3/11.9 mA 2420/2430 micromhos @ 14.4/13.1 mA2350/2440 micromhos @ 12.1/12.8 mA 2390/2400 micromhos @ 14.3/12.7 mA Bogey(100% or new) = 2200/2200 micromhos @ 10.0/10.0 mA +/- 10% I do combine S&H READ THIS: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 trans-conductance (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, ___-8.5___Volts bias or Cathode resistance* Most other testers CANNOT test tubes using the proper specifications and make up their own test results What were your tubes tested at?

4 x 12BH7A RCA Tubes*Strong Testing Quad* #2

Ende: 01.08. 2023 00:30:00 am Dienstag
  • Zustand: Gebraucht
  • Preis: 90.71 EUR FESTPREIS
  • Status: nicht verkauft
  • Artikelnummer: 285318397133
  • Verkäufer: fng2u (6439|98.9%)
  • Verkäufertyp: Gewerblich (mit Basis Shop)
  • Ort: Morganville, New Jersey USA
  • Versand nach: US
  • Versandkosten: 19,52 EUR
  • bei ebay
  • Beschreibung

    4 x 12BH7A RCA Tubes Made in USA Grey - O The lettering is smudged/worn 4 Pictures per Quad Tested on Enhanced Triplett E3444 Laboratory tester prepared by Paul Hart of Rosewell Ga. 2800/2700 micromhos @ 10.5/10.0 mA 2820/2620 micromhos @ 9.4/ 8.0 mA2500/2800 micromhos @ 8.4/ 9.7 mA2800/2500 micromhos @ 8.5/ 7.3 mA Bogey(100%) = 3100/3100 micromhos @ 11.5/11.5 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, ___-10.5___Volts bias or Cathode resistance*What were your tubes tested at? I do combine S&H

4 x 12au7a Hytron/Hammond Tubes*Black Plt-O*Very Strong Matched Quad*1960*#3

Ende: 01.08. 2023 00:29:58 am Dienstag
  • Zustand: Gebraucht
  • Preis: 68.03 EUR FESTPREIS
  • Status: nicht verkauft
  • Artikelnummer: 374739503344
  • Verkäufer: fng2u (6439|98.9%)
  • Verkäufertyp: Gewerblich (mit Basis Shop)
  • Ort: Morganville, New Jersey USA
  • Versand nach: US
  • Versandkosten: 27,56 EUR
  • bei ebay
  • Beschreibung

    4 x 12AU7a Hytron Tubes Made in USA for Hammond Short Black plates O getter Lettering may smudged/missing Codes = 1960 The auction is for 4 tubes Tested on Enhanced Tripplet E3444 Laboratry Tester prepared by Paul Hart Results = 2120/2270 micromhos @ 11.8/10.8 mA 2120/2020 micromhos @ 11.0/10.5 mA2100/2060 micromhos @ 10.5/10.1 mA 2080/1960 micromhos @ 9.6/ 9.8 mA Bogey(100% or new) = 2200/2200 micromhos @ 10.0/10.0 mA +/- 10% I do combine S&H READ THIS: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 trans-conductance (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, ___-8.5___Volts bias or Cathode resistance* Most other testers CANNOT test tubes using the proper specifications and make up their own test results What were your tubes tested at?