We have tons of these flats loaded with tubes! Weve opened many boxes to make sure tubes matched the boxes. Out of all the boxes opened, most matched but several had the correct number tube though different brand from the box. SOLD AS IS. Welcome to Vacuum Tube Depot! We have been one of the leading online suppliers of vacuum tubes for many years. Recently, we acquired a very large collection of tubes that we are excited to offer. We have tested and sold thousands of these tubes, and have many, many more to sell. After testing literally thousands of tubes from this collection, we have found only a small handful that did not test well. The vast majority tested strong. Buy with confidence, and if you are not happy with your purchase, you can send it back on your dime for a refund. We will combine shipping on multiple purchases within 5 days of the first auction ending. Payment must be made within 5 days or your purchase will be canceled and re-listed. We do not have the space to hold onto auctions for you for any longer than this. If you would like combined shipping, please wait to make payment until after we have sent your invoice. We send invoices each day after all auctions have ended for that day. Thank you for shopping with Vacuum Tube Depot!

We have tons of these flats loaded with tubes! Weve opened many boxes to make sure tubes matched the boxes. Out of all the boxes opened, most matched but several had the correct number tube though different brand from the box. SOLD AS IS. Welcome to Vacuum Tube Depot! We have been one of the leading online suppliers of vacuum tubes for many years. Recently, we acquired a very large collection of tubes that we are excited to offer. We have tested and sold thousands of these tubes, and have many, many more to sell. After testing literally thousands of tubes from this collection, we have found only a small handful that did not test well. The vast majority tested strong. Buy with confidence, and if you are not happy with your purchase, you can send it back on your dime for a refund. We will combine shipping on multiple purchases within 5 days of the first auction ending. Payment must be made within 5 days or your purchase will be canceled and re-listed. We do not have the space to hold onto auctions for you for any longer than this. If you would like combined shipping, please wait to make payment until after we have sent your invoice. We send invoices each day after all auctions have ended for that day. Thank you for shopping with Vacuum Tube Depot!

We have tons of these flats loaded with tubes! Weve opened many boxes to make sure tubes matched the boxes. Out of all the boxes opened, most matched but several had the correct number tube though different brand from the box. SOLD AS IS. Welcome to Vacuum Tube Depot! We have been one of the leading online suppliers of vacuum tubes for many years. Recently, we acquired a very large collection of tubes that we are excited to offer. We have tested and sold thousands of these tubes, and have many, many more to sell. After testing literally thousands of tubes from this collection, we have found only a small handful that did not test well. The vast majority tested strong. Buy with confidence, and if you are not happy with your purchase, you can send it back on your dime for a refund. We will combine shipping on multiple purchases within 5 days of the first auction ending. Payment must be made within 5 days or your purchase will be canceled and re-listed. We do not have the space to hold onto auctions for you for any longer than this. If you would like combined shipping, please wait to make payment until after we have sent your invoice. We send invoices each day after all auctions have ended for that day. Thank you for shopping with Vacuum Tube Depot!

We have tons of these flats loaded with tubes! Weve opened many boxes to make sure tubes matched the boxes. Out of all the boxes opened, most matched but several had the correct number tube though different brand from the box. SOLD AS IS. Welcome to Vacuum Tube Depot! We have been one of the leading online suppliers of vacuum tubes for many years. Recently, we acquired a very large collection of tubes that we are excited to offer. We have tested and sold thousands of these tubes, and have many, many more to sell. After testing literally thousands of tubes from this collection, we have found only a small handful that did not test well. The vast majority tested strong. Buy with confidence, and if you are not happy with your purchase, you can send it back on your dime for a refund. We will combine shipping on multiple purchases within 5 days of the first auction ending. Payment must be made within 5 days or your purchase will be canceled and re-listed. We do not have the space to hold onto auctions for you for any longer than this. If you would like combined shipping, please wait to make payment until after we have sent your invoice. We send invoices each day after all auctions have ended for that day. Thank you for shopping with Vacuum Tube Depot!

We have tons of these flats loaded with tubes! Weve opened many boxes to make sure tubes matched the boxes. Out of all the boxes opened, most matched but several had the correct number tube though different brand from the box. SOLD AS IS. Welcome to Vacuum Tube Depot! We have been one of the leading online suppliers of vacuum tubes for many years. Recently, we acquired a very large collection of tubes that we are excited to offer. We have tested and sold thousands of these tubes, and have many, many more to sell. After testing literally thousands of tubes from this collection, we have found only a small handful that did not test well. The vast majority tested strong. Buy with confidence, and if you are not happy with your purchase, you can send it back on your dime for a refund. We will combine shipping on multiple purchases within 5 days of the first auction ending. Payment must be made within 5 days or your purchase will be canceled and re-listed. We do not have the space to hold onto auctions for you for any longer than this. If you would like combined shipping, please wait to make payment until after we have sent your invoice. We send invoices each day after all auctions have ended for that day. Thank you for shopping with Vacuum Tube Depot!

Wir haben deinradio! Senden Sie uns eine Nachricht Unser Shop Verkäuferprofil Bewertungen Shop speichern Kontakt Letzte Auktionsrunde vor unserer Sommerpause!Kostenfreier Versand innerhalb Deutschlands! Die nächsten Artikel gehen am 26.08.2023 online.----- 3x 5763 Röhre Lorenz RCA Brimar geprüft top UKW Röhrenradio Tube Bitte entnehmen Sie den genauen Zustand und Lieferumfang den Bildern. Die Röhren wurden als gut geprüft. Wir bieten eine Vielzahl an alten Bastel -und Sammelobjekten an.Bitte beachten Sie, dass aufgrund des Alters keine Garantien auf die technischen Funktionen gegeben werden können.The parts are very old, we dont give any guarantee on the technical function. Zahlung Versand Kombiversand nur bei Artikeln möglich, die am gleichen Tag gekauft werden. (aus einer Auktionsrunde) DIe angepasste Rechnung erhalten Sie dann nach Auktionsende. Aufwendiger Versand (klimaneutral) mit DHL Premium in 2-welliger Kartonage und aufwendiger Polsterung! Versand größtenteils plastikfrei, 80 Prozent des Versandmaterial aus recyceltem Altpapier bzw. Second-Hand Kartonagen. WORLDWIDE SHIPPING ON REQUEST! PLEASE ASK BEFORE YOU BUY! Links Unser Shop Verkäuferprofil Bewertungen Shop speichern Kontakt Newsletter Verpassen Sie keine Angebote mehr! Wir informieren Sie über Angebote und Aktionen bequem per E-Mail. Newsletter abonnieren Kontakt Senden Sie uns eine Nachricht

  TUBE HUNTER VACUUM TUBE GEMS THESE ARE THE SPECIFICS OF THE TUBE/TUBES/PARTS FOR SALE THESE ARE THE TUBE/TUBES/PARTS FOR SALE:  MANUFACTURER:                               WESTINGHOUSE PRODUCTION CITY:                                     MADE IN USA TUBE TYPE:    5763 DESIGNATION:                                             PENTODE YEAR:    1960s MONTH:     NA Date code match    N/A  SILK SCREEN CONDITION %:                    00% MICA:    2 PLATES:    BLACK GM %:     121%, SINGLE/PAIR/QUAD/MULTI:    SINGLE GETTER:                                                          O GETTER DATE CODE                                                    VARIES CHECK THE DATA SHEETS.  THIS TUBES SUBS WELL FOR AN EL84!! YOU HAVE TO REWIRE THE PINS  TO SUBSTITUTE !!!! THIS AUCTION IS FOR ONE SINGLE  TUBE !!!  WESTINGHOUSE NOS NIB   5763   TUBE.    On my tester a B&K 747 tester: Below 55 = BAD 55-65 = ? 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

3 5763 JRC RCA CB Ham Radio HiFi Amp Vintage Vacuum Tubes Codes 59-13 NOS Tubes Tested on a TV-7D/U Tester 35 is Minimum (35-65% of a new tube) Tubes Test New 58, 56 and 54 PRICED TO SELL!!! Singerhouse Sound has been buying and selling vintage vacuum tubes and electronics for over 25 years. We will usually ship within 1 business day of receiving cleared payment. Please make payment within 2 days from end of auction.

We have tons of these flats loaded with tubes! Weve opened many boxes to make sure tubes matched the boxes. Out of all the boxes opened, most matched but several had the correct number tube though different brand from the box. SOLD AS IS. Welcome to Vacuum Tube Depot! We have been one of the leading online suppliers of vacuum tubes for many years. Recently, we acquired a very large collection of tubes that we are excited to offer. We have tested and sold thousands of these tubes, and have many, many more to sell. After testing literally thousands of tubes from this collection, we have found only a small handful that did not test well. The vast majority tested strong. Buy with confidence, and if you are not happy with your purchase, you can send it back on your dime for a refund. We will combine shipping on multiple purchases within 5 days of the first auction ending. Payment must be made within 5 days or your purchase will be canceled and re-listed. We do not have the space to hold onto auctions for you for any longer than this. If you would like combined shipping, please wait to make payment until after we have sent your invoice. We send invoices each day after all auctions have ended for that day. Thank you for shopping with Vacuum Tube Depot!

Welcome to Vacuum Tube Depot llc! We have been one of the leading online suppliers of vacuum tubes for many years. Recently, we acquired a very large collection of tubes that we are excited to offer. We have tested and sold thousands of these tubes, and have many, many more to sell. After testing literally thousands of tubes from this collection, we have found only a small handful that did not test well. The vast majority tested strong. Buy with confidence, and if you are not happy with your purchase, you can send it back on your dime for a refund. We will combine shipping on multiple purchases within 5 days of the first auction ending. Payment must be made within 5 days or your purchase will be canceled and re-listed. We do not have the space to hold onto auctions for you for any longer than this. If you would like combined shipping, please wait to make payment until after we have sent your invoice. We send invoices each day after all auctions have ended for that day. Combined shipping can only be combined with this shop, not other shops with similar names. Thank you for shopping with Vacuum Tube Depot llc! We have tons of these flats loaded with tubes. We opened maybe tons boxes to make sure tubes matched the boxes, out of all the boxes we opened. Most matched, but several had the correct number but different brand from box. Sold as is

6 Unused RCA GE 5763 Vacuum Tubes ???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ USA Shipping $6I have many other types of tubes No Additional Shipping Charges ~~ I will combine all Auctions purchased All tubes Guaranteed ?????? Thank You! ?????? ~~~~ Please click on the link below to view more items in my store. ~~~~~~~~ GreenGirls Guaranteed VintageTubes317

Vintage HITACHI 5763 Electronic VALVE TUBE New Old Stock BOXED Tested. Made in Japan.

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Compatible with / Kompatibel mit / compatibile con / compatible avec / compatible con: Acer * Aspire 4250 * Aspire 4250-C52G25Mikk * Aspire 4250-E352G50MI * Aspire 4250G * Aspire 4250Z * Aspire 4251 * Aspire 4251G * Aspire 4251Z * Aspire 4252 * Aspire 4252G * Aspire 4252Z * Aspire 4253 * Aspire 4253G * Aspire 4333 * Aspire 4339 * Aspire 4349 * Aspire 4350 * Aspire 4350G * Aspire 4352 * Aspire 4551 * Aspire 4551G * Aspire 4551G-P322G32Mn * Aspire 4551P * Aspire 4552 * Aspire 4552-5078 * Aspire 4552G * Aspire 4560 * Aspire 4560G * Aspire 4625 * Aspire 4733Z * Aspire 4738 * Aspire 4738G * Aspire 4738Z * Aspire 4738ZG * Aspire 4739 * Aspire 4739Z * Aspire 4741 * Aspire 4741G * Aspire 4741G-332G32Mnsk * Aspire 4741G-332G50Mn * Aspire 4741G-372G50Mnkk02 * Aspire 4741G-372G50Mnkk06 * Aspire 4741G-432G50Mnkk01 * Aspire 4741G-5452G50Mnkk04 * Aspire 4741G-5462G50Mnkk05 * Aspire 4741G-5464G50Mn * Aspire 4741Z * Aspire 4741ZG * Aspire 4741ZG-P602G50Mnkkc * Aspire 4741ZG-P622G50Mnkk03 * Aspire 4743 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E732-374G50Mnkk * eMachines E732-382G32Mikk * eMachines E732-382G50Mn * eMachines E732-383G50Mnkk * eMachines E732G-333G32Mnkk * eMachines E732G-3382G50MN * eMachines E732G-373G32Mnkk * eMachines E732G-373G50Mnkk * eMachines E732G-374G50Mnkk * eMachines E732G-383G50Mnkk * eMachines E732G-384G50Mnkk * eMachines E732Z-A12B * eMachines E732Z-P612G32 * eMachines E732Z-P613G32MNKK * eMachines E732Z-P622G25MNKK * eMachines E732Z-P622G32Mn * eMachines E732Z-P622G32Mnkk * eMachines E732ZG-P612G25Mikk * eMachines E732ZG-P613G32Mnkk * eMachines E732ZG-P614G32Mnkk * eMachines E732ZG-P614G50MN * eMachines E732ZG-P622G32Mikk * eMachines Eme732-372g25MNKK * TravelMate 4370 * TravelMate 4740 * TravelMate 4740-352G32Mn * TravelMate 4740-432G50Mna * TravelMate 4740-5261 * TravelMate 4740-5452G50Mnssb * TravelMate 4740-5462G50Mnss02 * TravelMate 4740-7552 * TravelMate 4740-7787 * TravelMate 4740G * TravelMate 4740Z * TravelMate 4740ZG * TravelMate 4750 * TravelMate 4750-2354G32Mnss * TravelMate 4750G * TravelMate 4750Z * TravelMate 4750ZG * TravelMate 5335 * TravelMate 5335G * TravelMate 5335Z * TravelMate 5340 * TravelMate 5340G * TravelMate 5344 * TravelMate 5360 * TravelMate 5360G * TravelMate 5542 * TravelMate 5542-P342G25Mnss * TravelMate 5542G * TravelMate 5735 * TravelMate 5735G * TravelMate 5735Z * Travelmate 5735ZG * TravelMate 5740 * TravelMate 5740-332G16Mn * TravelMate 5740-332G25Mn * TravelMate 5740-333G25Mn * TravelMate 5740-333G32Mn * TravelMate 5740-352G25Mn * TravelMate 5740-372G25Mnss * TravelMate 5740-434G32Mn * TravelMate 5740-5092 * TravelMate 5740-524G32Mn * TravelMate 5740-5896 * TravelMate 5740-5952 * TravelMate 5740-6070 * TravelMate 5740-6291 * TravelMate 5740-6529 * TravelMate 5740G * TravelMate 5740G-334G32Mn * TravelMate 5740G-434G32Mn * TravelMate 5740G-524G50Mn * TravelMate 5740G-528G64Mn * TravelMate 5740G-5452G32Mnss * TravelMate 5740G-6765 * Travelmate 5740Z * TravelMate 5740Z-P602G25Mn * TravelMate 5740Z-P604G32Mnss * TravelMate 5740ZG * TravelMate 5742 * TravelMate 5742-372G25Mn * TravelMate 5742-373G32Mn * TravelMate 5742-463G32Mn * TravelMate 5742-5562G50Mnss01 * TravelMate 5742-7013 * TravelMate 5742-7159 * TravelMate 5742-7399 * TravelMate 5742-7906 * TravelMate 5742-7908 * TravelMate 5742G * TravelMate 5742Z * TravelMate 5742Z-4693 * TravelMate 5742ZG * TravelMate 5744 * TravelMate 5744-372G32Mikk * TravelMate 5744-384G32Mnkk * TravelMate 5744-484G50Mnkk * TravelMate 5744G * TravelMate 5744Z * Travelmate 5760 * Travelmate 5760G * TravelMate 6495 * TravelMate 6495G * TravelMate 6495T * TravelMate 6495TG * TravelMate 6595 * TravelMate 6595G * TravelMate 7340 * TravelMate 7740 * TravelMate 7740 Series TravelMate 7740 * TravelMate 7740-352G32Mn * TravelMate 7740-353G25Mnss * TravelMate 7740-434G32Mnss * TravelMate 7740G * TravelMate 7740G-434G50Mnss * TravelMate 7740Z * TravelMate 7740Z-P604G32Mnss * TravelMate 7740ZG * TravelMate 7740ZG-P604G50Mnss * Travelmate 7750 * TravelMate 7750G * TravelMate 7750Z * TravelMate 7750ZG * TravelMate 8472 * TravelMate 8472 HF * TravelMate 8472G * TravelMate 8472G HF * TravelMate 8472T * TravelMate 8472T HF * TravelMate 8472TG * TravelMate 8472TG HF * TravelMate 8473 * TravelMate 8473G * TravelMate 8473T * TravelMate 8473TG * TravelMate 8572 * TravelMate 8572G * TravelMate 8572T * TravelMate 8572T HF * TravelMate 8572TG * TravelMate 8573 * TravelMate 8573G * TravelMate 8573T * TravelMate 8573TG * TravelMate P243 * TravelMate P243-M-33114G50Mikk * TravelMate P243-M-53214G50Mikk * TravelMate P243-M-6617 * TravelMate P243-M-6807 * TravelMate P243-MG * TravelMate P453 * Travelmate P453-M * TravelMate P453-M-33114G50Mikk * TravelMate P453-M-53214G50Mikk * TravelMate P453-M-6425 * TravelMate P453-M-6888 * TravelMate P453-MG * TravelMate TM5740 * TravelMate TM5740-X322 * TravelMate TM5740-X322D * TravelMate TM5740-X322DF * TravelMate TM5740-X322DHBF * TravelMate TM5740-X322DOF * TravelMate TM5740-X322DPF * TravelMate TM5740-X322F * TravelMate TM5740-X322HBF * TravelMate TM5740-X322OF * TravelMate TM5740-X322PF * TravelMate TM5740-X522 * TravelMate TM5740-X522D * TravelMate TM5740-X522DF * TravelMate TM5740-X522DHBF * TravelMate TM5740-X522DOF * TravelMate TM5740-X522DPF * TravelMate TM5740-X522F * TravelMate TM5740-X522HBF * TravelMate TM5740-X522OF * TravelMate TM5740-X522PF * TravelMate TM5742 * TravelMate TM5742-X732 * TravelMate TM5742-X732D * TravelMate TM5742-X732DF * TravelMate TM5742-X732DHBF * TravelMate TM5742-X732DOF * TravelMate TM5742-X732DPF * TravelMate TM5742-X732F * TravelMate TM5742-X732HBF * TravelMate TM5742-X732OF * TravelMate TM5742-X732PF * TravelMate TM5742-X742 * TravelMate TM5742-X742D * TravelMate TM5742-X742DF * TravelMate TM5742-X742DHBF * TravelMate TM5742-X742DOF * TravelMate TM5742-X742DPF * TravelMate TM5742-X742F * TravelMate TM5742-X742HBF * TravelMate TM5742-X742OF * TravelMate TM5742-X742PF eMachines * D442 * D528 * E440 * E442 * E640 * NEW85 PACKARD BELL * Easynote LM81 * Easynote LM82 * Easynote LM83 * Easynote LM85 * EasyNote LM86 * Easynote LM87 * Easynote LM94 * Easynote LM98 * Easynote TM01 * EasyNote TM80 * EasyNote TM81 * EasyNote TM82 * EasyNote TM83 * EasyNote TM85 * EasyNote TM86 * EasyNote TM87 * EasyNote TM89 * EasyNote TM94 Gateway * NS41I * NS51I * NV4900 * NV49C * NV49C13C * NV50A * NV51B * NV53 * NV5331U * NV5337U * NV5378U * NV5387U * NV53A * NV53A24u * NV53A36u * NV53A52u * NV55C * NV55C03u * NV55C11u * NV55C14u * NV55C15u * NV55C17u * NV55C19u * NV55C22u * NV55C24u * NV55C25u * NV55C26u * NV55C28u * NV55C29u * NV55C30u * NV55C31u * NV55C32u * NV55C33u * NV55C34u * NV55C38u * NV55C39u * NV55C44u * NV5926 * NV5926U * NV5929U * NV5930U * NV5932 * NV5932U * NV5933U * NV5935U * NV59C * NV59C05u * NV59C09U * NV59C11u * NV59C26u * NV59C27u * NV59C28U * NV59C31u * NV59C32U * NV59C34u * NV59C35u * NV59C40u * NV59C41u * NV59C42u * NV59C43U * NV59C44u * NV59C46u * NV59C47U * NV59C48u * NV59C49u * NV59C50u * NV59C56U * NV59C57U * NV59C66U * NV73A * NV73A08u * NV73A17u * NV79 * NV7915u * NV79C * NV79C34u * NV79C36u * NV79C48u * NV79C49u * NV79C50u * NV79C51u * NV79C52u * NV79C54uV55C35u Replaces / Ersetzt / sostituisce / remplace / sustituye: * 31CR19/65-2 * 31CR19/652 * 31CR19/66-2 * 3INR19/65-2 * AK.006BT.075 * AK.006BT.080 * AS10D * AS10D31 * AS10D3E * AS10D41 * AS10D51 * AS10D5E * AS10D61 * AS10D71 * AS10D73 * AS10D75 * AS10D7E * AS10D81 * Aspire E1-571G * BT.00603.111 * BT.00603.117 * BT.00603.124 * BT.00603.129 * BT.00604.049 * BT.00605.062 * BT.00605.065 * BT.00605.072 * BT.00605.072M * BT.00606.008 * BT.00607.125 * BT.00607.126 * BT.00607.127 * BT.00607.130 * BT.0060G.001 * LC.BTP00.123 * LC.BTP0A.015 For compatibility, please check under Replaces the following original battery types: to see if your currently used battery is listed. / Für eine gesicherte Kompatibilität prüfen Sie bitte unter Ersetzt folgenden Original Akkutyp: ob Ihr momentan verwendeter Akku aufgelistet ist. / Per verificare la compatibilità, verificare che la batteria attualmente in uso sia elencata in Sostituisce i seguenti tipi di batterie: / Pour une compatibilité garantie veuillez vérifier sous Remplace modèles dorigine suivante: si votre batterie actuelle y figure. / Para asegurar la compatiblidad compruebe que el dispositivo a sustituir se encuentre en la lista de dispositivos compatibles.

  TUBE HUNTER VACUUM TUBE GEMS THESE ARE THE SPECIFICS OF THE TUBE/TUBES/PARTS FOR SALE THESE ARE THE TUBE/TUBES/PARTS FOR SALE:  MANUFACTURER:                               WESTINGHOUSE PRODUCTION CITY:                                     MADE IN USA TUBE TYPE:    5763 DESIGNATION:                                             PENTODE YEAR:    1960s MONTH:     NA Date code match    N/A  SILK SCREEN CONDITION %:                    00% MICA:    2 PLATES:    BLACK GM %:     121%, SINGLE/PAIR/QUAD/MULTI:    SINGLE GETTER:                                                          O GETTER DATE CODE                                                    VARIES CHECK THE DATA SHEETS.  THIS TUBES SUBS WELL FOR AN EL84!! YOU HAVE TO REWIRE THE PINS  TO SUBSTITUTE !!!! THIS AUCTION IS FOR ONE SINGLE  TUBE !!!  WESTINGHOUSE NOS NIB   5763   TUBE.    On my tester a B&K 747 tester: Below 55 = BAD 55-65 = ? 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

VALVOLA 5763 RCA TUBE Made USA.

6AV6 6AU6A 6FH5 6X8 6BC5 6CE5 5763 5915 RCA RAYTHEON GE THE FISHER ZENITH TUBES. Condition is Used. Shipped with USPS Priority Mail.

Welcome to JNS Vintage Radios and Tubes Vintage Vacuum TubeByRCA1955 JRC 5763 Description: The RCA JRC 5763 is a nine-pin miniature with a square getter, clear glass, black plate, clean pins and a factory box. Test Results: This 5763 was tested using our Triplett 3413B tester.Test reads: 88%.Testing shows no shorts and no grid emissions. Comments: Clean JRC 5763. Used in military, commercial and amateur radios VHF/UHF. Visit Our Store@https://www.ebay.com/str/jnsvintageradioandtubes 60 Day Free Return. JNS Vintage Radios and Tubes will gladly combine shipping to save you money! Proud Members of the California Historical Radio Society______________________________________________________________________________________________General Info: Please read the listing in its entirety to understand what you are purchasing.If any information is unclear, its better to ask questions now than to have a return. JNS Vintage Radios and Tubes aims to be as accurate as possible when describing and testing radios and tubes. However, we are not experts in all Antique/Vintage Radios, Electronic Equipment and Vacuum Tubes. If you see an error, please contact us thru the eBay messaging system so we may correct the listing. Our vacuum tubes are inspected and tested on our newly rebuilt/calibrated Hickok 539B tester. The 539B is one of the best Hickok Testers. Each tube is cleaned and allowed to warm-up for 90 seconds prior to actual testing. Tubes are tested for quality, life, grid emissions and shorts. No tube is offered for sale that tests below the min number given. We also use our Triplett 3413B as a backup tester. Please note that all tube testers are not created equal, and your tester may show a higher or lower test result than our test equipment. All tubes are wrapped in bubble wrap, packed with peanuts and shipped in a sturdy cardboard box to protect it during transit. All antique and vintage radios are cleaned and tested when possible. Well provide an accurate description of the condition within the listing based on our findings. If you find an error or omission, please send us a message thru eBays message system. We now offer restored/repaired chassis by Bob Kelly Radio Restorations here in the Sierra. Bob has over 45 years as an electronics technician in the communications industry and has provided quality radio restorations for many years. Radios are wrapped in bubble wrap and packed with peanuts and when necessary, squares of Styrofoam used to protect glass dials, knobs and switches. A word on shipping:JNS Vintage Radios and Tubes uses the United States Postal Service for the majority of our shipments both in the US and Internationally. We employ the eBay shipping calculator to estimate shipping costs. We do not charge a handling fee unless the item is heavy and requires additional attention such as double boxing or needing a shipping crate built.The majority of our shipments use First Class Mail for vacuum tubes and Priority Mail for larger items which provides tracking and insurance. We also use Fed Ex as needed to help save you money. Please contact us should you desire another shipping service. While the eBay shipping calculator is usually accurate, but not always, It is our policy to refund any excess shipping after the item has shipped. Need a firm shipping quote? Contact us. All taxes and duties for international shipments are the responsibilities of the buyer. Please contact your local Customs or Import Authorities. A word regarding returns:If you receive your item and it is damaged. Please contact us first. We want you to be satisfied with your purchase and we work diligently to ensure concerns are resolved fairly, promptly and to your satisfaction. Communication is the key to a successful return. We are proud of our feedback profile maintaining a 100% satisfaction rate since 2014.Returns will be excepted on all tubes and radios unless otherwise specified in the listing description.Returns must be in the original packaging and must have a tracking number assigned. Delivery signature is not required. If the item has been damaged through shipping, please contact us first on how to proceed. This crucial step protects both the buyer and seller and ensures that claims get approved fast and quickly paid. There are no returns authorized on Untested Parts or Parts or Repair items. These items are purchased AS IS and will be stated in the listing description. JNS Vintage Radios and Tubes thanks you for visiting our store and allowing us to provide you quality tubes and vintage radios.

5763 Tube, USA, Multiple Brands, Tested Good On Hickok One 5763 tube, USA, USA. White box. New.  Various USA brands.  Photo shows Sylvania, could be RCA or similar. In order to be sold as NOS, it must be new old stock, filament continuity must check good, it must be free of shorts,and read solidly in the GOOD range.  If multiple tests are required, all are done. If the listing does not specify new, NOS, or new old stock, it is a used tube.  Or, as most sellers call them, pre-owned. If the tube is used, the same checks are made before marking it as good. The sale is for the tube only, the box is included for good measure (if I have it). If the original box shows in the photo, the tube will come in the original box. Expect boxes to show signs of wear and storage. Shabby boxes are often replaced with newer white boxes for safer shipping. This will be packed safely. Ships quickly from Mississippi. I have been selling on online for over 25 years, so buy with confidence.

Vintage HITACHI 5763 Electronic VALVE TUBE New Old Stock BOXED Tested. Made in Japan.

New - CV4039 M8096 6062 QVO3-12 5763 MULLARD BOXED VALVE TUBE NOS NIB

5763 BRIMAR RADIO VALVEUSED, TESTED, GOOD.

  TUBE HUNTER VACUUM TUBE GEMS THESE ARE THE SPECIFICS OF THE TUBE/TUBES/PARTS FOR SALE THESE ARE THE TUBE/TUBES/PARTS FOR SALE:  MANUFACTURER:                               SYLVANIA PRODUCTION CITY:                                     USA TUBE TYPE:   JAN 5763 DESIGNATION:                                             PENTODE YEAR:    1974 MONTH:     39 Date code match    N/A  SILK SCREEN CONDITION %:                    00% MICA:    2 PLATES:    BLACK GM %:     121% SINGLE/PAIR/QUAD/MULTI:    SINGLE GETTER:                                                          O GETTER DATE CODE                                                    7439 CHECK THE DATA SHEETS.  THIS TUBES SUBS WELL FOR AN EL84!! YOU HAVE TO REWIRE THE PINS  TO SUBSTITUTE !!!! THIS AUCTION IS FOR ONE SINGLE  TUBE !!!  Sylvania NOS NIB   5763   TUBE.    On my tester a B&K 747 tester: Below 55 = BAD 55-65 = ? 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

  TUBE HUNTER VACUUM TUBE GEMS THESE ARE THE SPECIFICS OF THE TUBE/TUBES/PARTS FOR SALE THESE ARE THE TUBE/TUBES/PARTS FOR SALE:  MANUFACTURER:     GE PRODUCTION CITY:                                    HARRISON NEW JERSEY TUBE TYPE:   5763 DESIGNATION:                                             RIGHT TUBE WRONG BOX YEAR:     MONTH:    Date code match    SINGLE MICA:    2 PLATES:    GREY GM %:     120% ON ALL SINGLE/PAIR/QUAD/MULTI:    SINGLE GETTER:                                                          O GETTER                                        DATE:      VARIES GE FOUND IN AN RCA BOX.TEST GREAT This auction is for ONE TUBE. You will receive one of these tubes.  Normal 0 false false false EN-US X-NONE X-NONE On my tester a B&K 747 tester:    Below 55 = BAD      55-65 = ?     65 -100 = Good     100-120+ = NOS     NOTES ON THE BOXES. LISTING WILL GENERALLY HAVE INFORMATION ABOUT ANY BOXES ASSOCIATED WITH THE TUBES FOR SALE. THESE ARE THE OPTIONS: 1. ORIGINAL BOXES IN VARYING CONDITION. THESE BOXES WILL BE THE ORIGINAL BOXES THE TUBES CAME IN AND WILL SHOW AGING IN VARYING DEGREES. THESE TUBES ARE ASSUMED TO BE NEW AND WILL TEST AS NOS. 2. NO BOXES PROVIDED (NONE AVAILABLE USUALLY USED AND SHOULD BE ASSUMED TO BE USED UNLESS OTHERWISE STATED. 3. REPURPOSED BOXES. THESE ARE BOXES OF THE SAME MANUFACTURER. THESE WILL HAVE A LABEL OVER THE TUBE NUMBER THAT REFLECTS THE TUBE BEING SOLD. THESE TUBES SHOULD BE ASSUMED TO BE USED UNLESS OTHERWISE STATED. 4. TUBEHUNTER BOXES. THESE ARE BOXES I HAVE MADE WITH GREAT TIME AND EXPENSE TO PROTECT YOUR VACUUM TUBES AND PROVIDE FOR STORAGE AND EASY IDENTIFICATION. TUBES IN THESE BOXES SHOULD BE ASSUMED TO BE USED UNLESS OTHERWISE STATED. 5. WHITE BOXES. SHOULD BE SELF EXPLANATORY. TESTING OF TUBES: THIS IS DONE ON A NUMBER OF TESTING DEVICES 1. TEKTRONIX CURVE TRACER 2. B&K 747 TUBE TESTER 3. MERCURY 1000 DYNAMIC MUTUAL CONDUCTANCE TESTER INTERPRETATION OF RESULTS: NOS = 80% TO 135% GOOD = 65% TO 80% ? OR MARGINAL : 55% TO 65% BAD = 55% TESTING RESULTS SHOW HOW THE TUBE IS PERFORMING  NOW.  TESTING RESULTS DO NOT SHOW HOW OLD A TUBE IS OR HOW MANY HOURS IT HAS BEEN USED. HOWEVER IF A TUBE TEST NOS YOU CAN BE ASSURED IT WILL LAST A LONG TIME AND IS WORKING VERY WELL. 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

Vintage rca vacuum tube. In sylvania box. Please see pics.