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:                              MULLARD PRODUCTION CITY:                                    BLACKBURN TUBE TYPE:   6DJ8 DESIGNATION:                                             ORANGE GLOBE YEAR:     1969 MONTH:   OCT Date code match    YES SILK SCREEN CONDITION %:                   100% MICA:   2 PLATES:   GREY GM%:   120%,120% AND 120%,116% SINGLE/PAIR/QUAD/MULTI:   PAIR GETTER:                                                         O GETTER DATE CODE                                                   B 9 J 4 THIS AUCTION IS FOR ONE PAIR!!! THESE TUBES HAVE BEEN CURVE TRACER MATCHED. THE CURVES SHOWN IN THE PICTURES ARE OF EACH TRIODE. EXAMINE THE CURVES FOR LINEARITY.  CURVE TRACER MATCHED!!! TESTING ACCORDING TO DATA SHEETS FOR 6DJ8’S ARE AS FOLLOWS: 90 PLATE VOLTS, MARGINAL GOOD 65%: 21.4ma, LOW NOS 85% = 28ma, NOS 100% = 33ma. THIS PAIR MEASURES: 35, 33, 32, 34ma. SUPER RARE LARGE GLOBE MULLARDS!!! These particular tubes are rare. Of the thousands of Orange Globes tubes I have sold, only a handful have been made in England using the Bugle Boy/Orange globe insides. Most England tubes have an a-frame construction. These are the HeErlen type insides. Very rare and very sweet. It would be like finding a gold doubloon on the beach to see these beauties again. I will accept no offers on these tubes. 99.99 or I keep them for me. BLACKBURN examples of tube perfection. These pairs are super strong testers. Sonically they are AWESOME! I listened to them for hours, Led Zep, Pavarotti, Tony Bennett, Barry white. These tubes deliver the goods. I compare them to Siemens and Telefunkens. Very tight Highs. The warm but most accurate mids. A little bass compression but not bad. Absolutely no microphonics! Heres what Joe of Joes Tube Lore has to say about these tubes: Mullard 6DJ8, Great Britain (shield, steel pins) One of my pair of these died a year ago (moment of reverent silence please....) so I couldn’t compare it directly to the others in this shoot-out. Given the vagaries of long distance auditory memory I will not comment on specifics other than to say I remember it as quite good and worth checking out if you get the chance. Normal 0 false false false EN-US X-NONE X-NONE On my tester a B&K 747 tester:    Below 55 = BAD      55-66 = ?     65 -100 = Good     100-120+ = NOS   I want to see you happy with your purchase. I will never sell a tube that is below standard…… I have sold many tubes here on Ebay, and all my customers have been completely satisfied. I will work with you in good faith if there are any problems, or if you are unsatisfied in any way. I want your business now and in the future, so I assume you are the boss, and I am the employee. All tubes are tested for shorts, continuity, and emissions. I prefer PayPal. ALL CUSTOMERS PLEASE READ ALL NOTES BEFORE BUYING FROM ME !! 1.  RETURNS: It is my highest desire that you are completely satisfied with your purchase from me. I will bend over backwards to make sure that you are a happy customer. If anything you buy from me is less than satisfactory, message me BEFORE you either open a case or hit the “item not as described” button. Sound quality is tremendously SUBJECTIVE. For tubes returned for noise or sound quality of any kind you pay for the shipping we refund the purchase. We refund the price of the item NOT THE SHIPPING COST. If we sent the wrong tube we will of course pay for return shipping. For any tubes that are DOA we require that you send a us a picture of the shipping box to show us the damage. We test EVERY tube sent out and none should be DOA unless broken in shipping. 2.    PLEASE NOTE:  Tube silkscreen (lettering on the tubes) is VERY fragile. It can be wiped off and destroyed VERY easily. If you wipe off the silkscreen while handling the tube you diminish their value by up to 70%. DO NOT handle the tubes or hold them from the cylinder. ALWAYS hold them from the ENDS. If you are returning tubes and they are not in the same condition cosmetically I cannot give you a full refund. THIS IS VERY IMPORTANT. 3.  UNLESS YOU MAKE ARRANGEMENTS WITH US BEFORE YOU PURCHASE, YOU MUST PAY FOR ITEMS PURCHASED WITHIN 2 DAYS OR A CASE WILL BE OPENED FOR AN UNPAID ITEM!!! 4. TESTING: I test all tubes that I sell in one way or another, or I will state untested. I have a B&K 747 tube tester. This is a mutual conductance tester. It give a percentage value of gm for the tube under test and checks for shorts and grid emissions. I also use a Tektronix curve tracer for testing triodes. I give a number of evaluations for tubes. One evaluation is a screen shot of the tube with a high voltage applied to the plate. This helps the buyer see the linearity of the tube in question at the highest voltage the tube will see in a real circuit. The Curve tracer steps the triode through 10 gate/grid voltages starting with -10 volts and going to 0 volts. The lines show how the tube conducts throughout that range. At 0 volt the tube is at max conduction and is the top line on the display. It is easy at that point to take where that top line intersects the plate voltage, find the milliamp level and compare it to the datasheet. I give those numbers for you in the Item condition box. To further help the buyer I also include the Design values, for gm and ma readings in the table. This can then be compared to other tube sellers using inferior test methods such as Hickok,  Amplitrex, and other testers. The Tektronix curve tracer gives values within 3% of the actual value. The very best portable testers only can approach 10% accuracy.5.    Please note: The numbers given for gm are what I see on my tester. I DO NOT guarantee that you will see those numbers on your tester. I only guarantee that these tubes will test good, with no shorts, or gas, on a decent calibrated tester. I dont guarantee or imply anything else. 6. VERY IMPORTANT!!! Vintage tube testers almost always, due to age, have VERY LOW HEATER VOLTAGES!!!  Every tester I have ever bought is below 6 volts when selecting 6.3 volts. They average 5.8 volts. The voltage NEEDS to be 6.3 and 12.6. You can calibrate a vintage tube tester all you want. If the heater voltage is not right, you will NEVER get the right gm value. I have customers complain that their tubes are not the same as what I see on my tester. They say they have a calibrated tube tester. I have 40 tube testers. On all of them I have an outside regulated DC power supply that feeds the tube tester the correct heater voltage. 7. I dont check each and every tube for noise or tone. This is SUBJECTIVE and it is too time consuming. If you dont like the noise level or the tone we offer a hassle free refund policy.  International customers note: 1. Please wait for us to invoice you for the correct amount. If you have purchased more than one item, we must calculate how much the shipping will be. Shipping will be HIGHER due to insurance and shipping methods needed for expensive item totals. If you are buying only one item this will not be an issue. 2. Under no circumstances will we state on a US customs a declared value of less than the sale price. This is an honesty issue. We are honest with everyone to the best of our ability to do so. We want you to trust that what we say is true. There cannot be that trust, if we make false statements knowingly to anyone. If your country has tariffs/taxes so high that they cause large numbers of normally honest folks to make false statements, we urge you to work for change of those laws. 3 International buyers if you bought more than one item and want combined shipping it will ship in 2 days. 4. And all the Angels sang because the heavenly music was playing and it was turned all the way up.   Listing and template services provided by inkFrog

Mullard E88CC / CV2492 / 6DJ8 / 6922 gold pin military Valve/Vacuum Tube - AVO Tested strong and balanced R8G5 Data Code = Mitchum 1968. KB/D. Possibly NOS. Tested on a recently calibrated AVO VCM 160 with the following results; IA GMValve 1: A1 14.4 14.3 A2 14.2 14.0 AVO NOS Specs: IA = 15.0 GM = 12.5 No leaks or shorts, shiny pins. eBay seller for over 20 years, buy with confidence - see feedback. Valve will be shipped next day, carefully packaged, tracked and insured. Please drop a note with any questions. Shipping happily combined on multiple items. For overseas purchases, please message for a shipping quote before purchasing. Dont use your amp as a circuit breaker, buy tested valves!

2x Mullard E88CC Valves Rare ECC88 manufactured in Mullard Mitcham factory with dimple disc getter and gold pins Date Code: 7L1 R5F3 (1965), *** R5L2 (1965) Tested by AVO VCM Tester Valve 1 Ia1 = 10.5(mA), gm1 = 10(mA/V) Ia2 = 11(mA), gm2 = 10(mA/V) Valve 2 Ia1 = 11.2(mA), gm1 = 10.2(mA/V) Ia2 = 10.5(mA), gm2 = 10.3(mA/V) NOS specification: Ia = 15(mA), gm = 12.6(mA/V) *** This valve has also been tested in amplifier without any noise. *** Postage Costs I am happy to post this item to worldwide and combine postage cost on multiple purchases. 20230522L012

4x Mullard/Holland E88CC Valves Date Code: *** ?5D2, *** ?5D3, *** ?5D3, *** ?5D4 Tested by AVO VCM Tester Valve 1 Ia1 = 13.5(mA), gm1 = 12.2(mA/V) Ia2 = 15.5(mA), gm2 = 12.5(mA/V) Valve 2 Ia1 = 14.5(mA), gm1 = 12.8(mA/V) Ia2 = 13.7(mA), gm2 = 12.3(mA/V) Valve 3 Ia1 = 14(mA), gm1 = 12.7(mA/V) Ia2 = 13.3(mA), gm2 = 12.3(mA/V) Valve 4 Ia1 = 14.5(mA), gm1 = 12.5(mA/V) Ia2 = 15(mA), gm2 = 12.6(mA/V) NOS specification: Ia = 15(mA), gm = 12.6(mA/V) *** This valve has also been tested in amplifier without any noise. *** Postage Costs I am happy to post this item to worldwide and combine postage cost on multiple purchases. 20221122L046

Quad ECC88 NOS 6DJ8 MULLARD Tube Valve Valve TESTED L1-3 Same Code GA1 /B1D If its a 3 character code, the valve was produced pre 1960. Tested with Russian L1-3 Tube tester. Where 75ma is 100% by the Test card. Test Condition:Uf = 6,3VUa = 90VRk = 80Ohm 1st tube 78/ 80ma2nd tube 74/ 77ma3rd tube 74/ 78ma4th tube 74/ 74ma Combine shipping is accepted.If you need less or more items of this type, or if you need add some other items, contact us, and we will make special listing for you.Give us the list of items you need, and well do the rest. We have many other vacuum tubes for audio and other, ask us if you need any of them. Items are shipped from EU- Lithuania Post via expedited International tracking.

Quad ECC88 NOS 6DJ8 MULLARD Tube Valve Valve TESTED L1-3 GA1 /B1D & B1C If its a 3 character code, the valve was produced pre 1960. Tested with Russian L1-3 Tube tester. Where 75ma is 100% by the Test card. Test Condition:Uf = 6,3VUa = 90VRk = 80Ohm 1st tube 74/ 74ma2nd tube 78/ 75ma3rd tube 75/ 70ma4th tube 76/ 72ma Combine shipping is accepted.If you need less or more items of this type, or if you need add some other items, contact us, and we will make special listing for you.Give us the list of items you need, and well do the rest. We have many other vacuum tubes for audio and other, ask us if you need any of them. Items are shipped from EU- Lithuania Post via expedited International tracking.

  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:    MULLARD................................................... PRODUCTION CITY:                                    BLACKBURN ENGLAND TUBE TYPE:   6DJ8 DESIGNATION:                                             TEKTRONIX CHECKED RED LABEL YEAR:     1976 MONTH:   DECEMBER Date code match    YES SILK SCREEN CONDITION %:                   100% MICA:   2 PLATES:   GREY CURVE TRACER ma:                    TUBE 1      34ma AND 36ma AT 90PV AND 0G CURVE TRACER ma:                    TUBE 2      35ma AND 34ma AT 90PV AND 0G TRANCONDUCTANCE:                TUBE 1      1290µmhos AND 1360µmhos TRANCONDUCTANCE:                TUBE 2      1325µmhos AND 1290µmhos PERCENTAGE OF BOGEY:          TUBE 1              103% AND 109% PERCENTAGE OF BOGEY:          TUBE 2              106% AND 103% SINGLE/PAIR/QUAD/MULTI:   PAIR GETTER:                                                         A FRAME DIMPLE GETTER DATE CODE                                                   B 6 L 3 JUST ONE THING TO KEEP IN MIND. THEY ARENT MAKING THESE ANY MORE. THIS IS THE HEIGHT OF MULLARD TUBE PRODUCTION AND THE CULMINATION OF YEARS OF THE BEST MINDS IN SCIENCE WORKING FOR DECADES TO PERFECT THE MATERIAL, WORKMANSHIP, AND PROCESSES THAT CREATED THE FINEST VACUUM TUBES EVER MADE. I HUNT THESE JEWELS DOWN LIKE SHERLOCK HOLMES, USING ALL MY KNOWLEDGE TO FIND THEM IN VARIOUS SURPLUS SCIENTIFIC EQUIPMENT. THERE WILL COME A DAY WHEN THERE ARE NO MORE LEFT. THIS PAIR WILL LAST 10 THOUSAND HOUR GIVE OR TAKE A FEW HUNDRED HOURS.  THEY ARE WORTH EVERY PENNY. BLACKBURN examples of tube perfection. These pairs are super strong testers. Sonically they are AWESOME! I listened to them for hours, Led Zep, Pavarotti, Tony Bennett, Barry white. These tubes deliver the goods. I compare them to Siemens and Telefunkens. Very tight Highs. The warm but most accurate mids. A little bass compression but not bad. Absolutely no microphonics! Normal 0 false false false EN-US X-NONE X-NONE Heres what Joe of Joes Tube Lore has to say about these tubes: Mullard 6DJ8,  Great Britain (shield, steel pins) One of my pair of these died a year ago  (moment of reverent silence please....) so I couldn’t compare it directly to the  others in this shoot-out. Given the vagaries of long distance auditory memory  I will not comment on specifics other than to say I remember it as quite good  and worth checking out if you get the chance. -  What does Checked Tube mean? Tektronix was the leader in high MEGAHZ  machines. They were doing some really fast switching. Tektronix was building  equipment that was on the leading edge of tube technology. They did things that required careful matching of tube characteristics, such as 18 tube distributed vertical amplifiers.  Some of their circuits, by virtue of their being flat from DC to 100MHz, or so  required tubes that had unusually stable characteristics. They needed the tubes to  meet very high standards in some critical circuits. At times only a single manufacturer  made tubes that met those standards.  Because of these special needs, Tektronix had a department dedicated to testing and matching vacuum tubes. They assigned, special part numbers to these highly tested and selected tubes. These tubes were selected by  Tektronix for use in critical sections of precision testing equipment. They were hand  selected for GM values and balance (within 2% per section). They also  were checked  for NOISE. They are the lowest noise tubes you can find for the brand selected. That is  what the CHECKED STICKER are all about. Tektronix was very picky about the  components that went into their equipment. They made the VERY best test  equipment of all time in my opinion.  These tubes are an embodiment of that fact.  They sound great in my headphone amp, and they will in yours! Normal 0 false false false EN-US X-NONE X-NONE On my tester a B&K 747 tester:    Below 55 = BAD      55-66 = ?     65 -100 = Good     100-120+ = NOS *********************************************************************************** IMPORTANT NOTE ON FILLING ORDERS With NOS tubes we will substitute NOS American tubes with NOS American of a different brand to fill an order if we are short the brand listed. If you are brand sensitive let me know BEFORE you order.  NOTES ON PHOTO PROPS:  THE RCA DOG, AND PHONO ARE NOT PART OF THE SALE. THIS IS TRUE OF ANY PROPS USED IN PHOTOGRAPHY IN THE LISTING THAT ARE NOT SPECIFICALLY CALLED OUT IN THE LISTING AS ITEMS FOR SALE. NOTES ON PHOTOS FOR SINGLE TUBES: IF YOU ARE BUYING A SINGLE TUBE: FOR THE MOST PART WITH TUBES UNDER 15 DOLLARS WE ARE USING STOCK PHOTOS FOR SINGLES. YOUR MILEAGE MAY VARY. YOU WILL RECEIVE A NEW TUBE. IT WILL TEST NOS. IT MAY OR MAY NOT BE ONE OF THE ONES IN THE PICTURE. WE GET TUBES IN ALL THE TIME. WITH SINGLES OF A LOW VALUE WE ARE NOT PICKY ABOUT DATES AND CONSTRUCTION AND THINGS LIKE THAT. WE ALSO MAY SUBSTITUE A TUBE BY A DIFFERENT MANUFACTOR IF WE ARE LOW ON STOCK OF THAT BRAND SUCH AS AN RCA FOR A GE FOR EXAMPLE, BUT WE WILL NOT SEND A JAPANESE BRAND FOR A USA MADE TUBE, OR A LOWER QUALITY TUBE IN ANY WAY. IF WE ARE SELLING A PAIR, OR A HIGH VALUE SINGLE THEN WE GET SERIOUS ABOUT SUCH THINGS.  NOTES ON MATCHING: 1. TRIODES SIMILAR TO 12AX7 ARE DONE ON A TEKTRONIX 576 CURVE TRACER IF I HAVE MATCHED THEM WITH THIS MACHINE I GUARANTEE THAT THESE MATCHED PAIRS WILL BE NOT BE ABLE TO DIFFERENTIATED WITH THE HUMAN EAR IN A PREAMP CIRCUIT.  2. ON OTHER TUBE I USE A CALIBRATED HICKOK 600A TO MATCH TUBES. 3. ON MODERN TUBES, FOR WHICH THE 600A CANNOT PERFORM TESTS, I USE THE CALIBRATED B&K 747B TUBE TESTER. 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. NOTES ON 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 4. HICKOK 600A DYNAMIC MUTUAL CONDUCTANCE TUBE TESTER  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 NOTE!!! 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. NOTE 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.  8. NOTE. 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. NOTES ON CUSTOMER RELATIONS: 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. NOTES ON RETURNS: 1.  NOTE: 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.2. NOTE: We almost always have a replacement available of the same or sometimes even higher quality. Please note that it is our desire TO DO BUSINESS! We never rip anyone off.......EVER. 3. NOTE: 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.4. NOTE: 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.5.    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. 6. NOTE: 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!!! 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. NOTE: 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 NOTE: International buyers if you bought more than one item and want combined shipping it will ship in 2 days.4. NOTE: 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

2 balance matched mullard 6dj8 ecc88 audio tubes, rich dynamics pro rated hifidelity vintagee88cc/6922 circuit ready w/ low level detail / holographic transparency / record style intimacy100% gm and audio grade, real british codes/labels! (be aware of relabelers) ships worldwide ~see our other listings for alternate listening positions, best offer enabled~~cali acoustics~~vintage hifidelity tone vacuum tube pro audio ~ warm bright / lofi hifi~~6dj8 7dj8 6922 7308 / ecc88 pcc88 e88cc e188cc / cv2492 cca ~~12ax7 12au7 12at7 / ecc83 ecc82 ecc81 ~ 6bq5 el84 ~ 6267 ef86 ~ 6aq8 ecc85~ ~preamps stereos vocals instruments mics rode k2/ntk audio technica at-4060 bluemics wooaudio liquidplatinum aesthetix cat audiotesearch arc echo ear herron decco lector manley horizons conrad frontiers pathos marantz vac psaudiobhk +more apps! ~caliacoustics.com (soon!)~

All 4 tubes tested good with a B&K 707 GE- 90,90 Sylvania NOS- 80,80 Amperex- 90,88 Mullard- 90,92 where 65,65 is minimum SOLD 100% GUARANTEED AS PICTURED WE WILL COMBINE SHIPPING ON MULTIPLE ITEM ORDERS.When purchasing multiple items, please let us know before making payment so that we can adjust the shipping amount on the invoice Check out my other items! Please take a look at our other sales for more vintage computer items.IBM Univac & Mark 1, DEC pdp, Mits Altair, The Maniac 1 and much more Please check out our store for many great deals!Our prices are not set in stone. Make an offer on Buy It Now itemsWe strive for a smile when you receive your item. If you feel the need to leave negative/neutral feedback, please contact us first to give us an opportunity to resolve the issue. Please contact us with any issues before opening a return/not as described case. We will resolve the situation more quickly To the very few overseas buyers that ask, we will not undervalue for customs. Sold Guaranteed Please email questions

old stock mullard 6dj8 ecc88 audio tube, legendary hifidelity! limited run special edition (rare)tweed pub tone warm british stage for tube mics pre amps vocals instruments stereos+popular 6922/e88cc circuit plugin w/ additional texture reveal and low level detailsbalance matched triodes 102/101 % mutual gm (100+nos/65+good) ~see our other listings for alternate listening positions! bid/buy/best offer~~vintage hifidelity tone / vacuum tube pro audio / warm bright lofi hifi~caliacoustics instagram (live) / caliacoustics.com (soon!)~~cali acoustics~ ~6dj8 7dj8 6922 7308 / ecc88 pcc88 e88cc e188cc cv2492 cca ~~12ax7 12au7 12at7 / ecc83 ecc82 ecc81 ~ ~6bq5 el84 ~ 6267 ef86 ~ 6aq8 ecc85~ 6ca7 el34 (new!) ~preamps stereos vocals instruments tubemics rode k2/ntk audio technica at-4060 bluemics wooaudio liquidplatinum aesthetix cat audioresearch arc echo ear herron decco lector manley horizons conrad frontiers pathos marantz vac psaudio bhk + more apps!~

2 hifidelity 69 mullard 6dj8 ecc88 audio tubes, sweet tone detailed rugged aframe dynamics!vtv 97 pro ranked unique harmonics! superb forward stage for mics amps vocals instruments+popular 6922/e88cc circuit plugin w/ additional texture reveal and low level details100/122~90/88 % mutual gm (100+nos/65+good), ships worldwide ~see our other listings for alternate listening positions! bid/buy/best offer~vintage hifidelity tone / vacuum tube pro audio / warm bright lofi hificaliacoustics instagram (active) / caliacoustics.com (soon!)~cali acoustics~ ~6dj8 7dj8 6922 7308 / ecc88 pcc88 e88cc e188cc cv2492 cca ~~12ax7 12au7 12at7 / ecc83 ecc82 ecc81 ~ ~6bq5 el84 ~ 6267 ef86 ~ 6aq8 ecc85~ 6ca7 el34 (new!) ~preamps stereos vocals instruments mics rode k2/ntk audio technica at-4060 bluemics wooaudio liquidplatinum aesthetix cat audioresearch arc echo ear herron decco lector manley horizons conrad frontiers pathos marantz vac psaudiobhk +more apps~

2 hifidelity mullard 6dj8 ecc88 audio tubes, rich dynamic tone! legendary sound stagrsuperb bass personality/resolve for tube mics pre amps vocals instruments stereos+popular 6922/e88cc circuit plugin w/ additional texture reveal and low level details114/112~115/115 % mutual gm (100+nos/65+good), ships worldwide ~see our other listings for alternate listening positions! bid/buy/best offer~vintage hifidelity tone / vacuum tube pro audio / warm bright lofi hificaliacoustics instagram (active) / caliacoustics.com (soon!)~cali acoustics~ ~6dj8 7dj8 6922 7308 / ecc88 pcc88 e88cc e188cc cv2492 cca ~~12ax7 12au7 12at7 / ecc83 ecc82 ecc81 ~ ~6bq5 el84 ~ 6267 ef86 ~ 6aq8 ecc85~ 6ca7 el34 (new!) ~preamps stereos vocals instruments mics rode k2/ntk audio technica at-4060 bluemics wooaudio liquidplatinum aesthetix cat audioresearch arc echo ear herron decco lector manley horizons conrad frontiers pathos marantz vac psaudiobhk +more apps~

1 Piece ECC88 6DJ8 Mullard New Old Stock Valve /Tube Fully Tested Book Value: IA: 15 GM: 12.6 ± 20% Test results This Valve IA: 17 GM: 10.6 IA: 16.8 GM: 10.3 As PhotoPurchasing one or more item from this listing, please choose the Tracked or Signed option. You will get the correct postage without waiting for me to combinePurchasing from This Listing + another Listings in my eBay shop?I will combine postage regardless of what eBay says.Please purchase all the items required (press buy it now confirm and pay button). You have purchased the items Please do nothing else. Do NOT press Pay, please, do NOT go to eBay Pay Now tab and pay. Please do NOT do a checkout saying payment by other method as eBay will not allow me to change the postage if you do so.. Please leave and I will adjust the postage.Yes, you can confirm purchase without paying as I do not require instant payment. All parcels with value of GBP20 and over MUST be tracked UK All parcels worldwide MUST be tracked

2x Mullard E88CC Valves Rare ECC88 manufactured in Mullard Mitcham factory with dimple disc getter and gold pins Date Code: 7L1 R5F3 (1965), *** R5L2 (1965) Tested by AVO VCM Tester Valve 1 Ia1 = 10.5(mA), gm1 = 10(mA/V) Ia2 = 11(mA), gm2 = 10(mA/V) Valve 2 Ia1 = 11.2(mA), gm1 = 10.2(mA/V) Ia2 = 10.5(mA), gm2 = 10.3(mA/V) NOS specification: Ia = 15(mA), gm = 12.6(mA/V) *** This valve has also been tested in amplifier without any noise. *** Postage Costs I am happy to post this item to worldwide and combine postage cost on multiple purchases. 20230522L012

2x Mullard ECC88 Valves Date Code: GA* B8A5, *** B5B3 NOS Tested by AVO VCM Tester Valve 1 Ia1 = 19.5(mA), gm1 = 12.6(mA/V) Ia2 = 24(mA), gm2 = 14.8(mA/V) Valve 2 Ia1 = 20(mA), gm1 = 11.3(mA/V) Ia2 = 29(mA), gm2 = 13.7(mA/V) NOS specification: Ia = 15(mA), gm = 12.6(mA/V) *** This valve has also been tested in amplifier without any noise. *** Postage Costs I am happy to post this item to worldwide and combine postage cost on multiple purchases. 20221122L018

4x Mullard/Holland E88CC Valves Date Code: *** ?5D2, *** ?5D3, *** ?5D3, *** ?5D4 Tested by AVO VCM Tester Valve 1 Ia1 = 13.5(mA), gm1 = 12.2(mA/V) Ia2 = 15.5(mA), gm2 = 12.5(mA/V) Valve 2 Ia1 = 14.5(mA), gm1 = 12.8(mA/V) Ia2 = 13.7(mA), gm2 = 12.3(mA/V) Valve 3 Ia1 = 14(mA), gm1 = 12.7(mA/V) Ia2 = 13.3(mA), gm2 = 12.3(mA/V) Valve 4 Ia1 = 14.5(mA), gm1 = 12.5(mA/V) Ia2 = 15(mA), gm2 = 12.6(mA/V) NOS specification: Ia = 15(mA), gm = 12.6(mA/V) *** This valve has also been tested in amplifier without any noise. *** Postage Costs I am happy to post this item to worldwide and combine postage cost on multiple purchases. 20221122L046

2x Mullard/Holland E88CC Valves Date Code: *** ?5D3, *** ?5D3 Tested by AVO VCM Tester Valve 1 Ia1 = 13.4(mA), gm1 = 12.3(mA/V) Ia2 = 13.5(mA), gm2 = 12.4(mA/V) Valve 2 Ia1 = 15(mA), gm1 = 12.6(mA/V) Ia2 = 15.5(mA), gm2 = 12.9(mA/V) NOS specification: Ia = 15(mA), gm = 12.6(mA/V) *** This valve has also been tested in amplifier without any noise. *** Postage Costs I am happy to post this item to worldwide and combine postage cost on multiple purchases. 20221122L047

2 legendary hifidelity 6dj8 ecc88 mullard gt britain audio tubes, limited run late 60s stylepopular 6922/e88cc circuit plugin w/ texture reveal and low level detailsauthentic old british paint codes, fully tested audio gradeships priority worldwide, best offer enabled ~see our other mullard 6dj8 7dj8 6922 e88cc listings for alternate listening positions~ ~cali acoustics~~stereos preamps vocals instruments tubemics and more lofi hifi vintage tone 6dj8 6922 apps~~rodemics liquid platinum woo audio aesthetix cat audioresearch arc ear herron decco lector manley horizons echo bluemics conrad frontiers pathos vac and more!~

2 vintage authentic mullard 6dj8 ecc88 center stage hifidelity audio tubes w/ rca logosfamed gt britain etch tone! dynamic bass and holographic shimmery imaging, lots of personalitycollectible limited runs last 60s types w/ superb reach for vocals/instruments/amps+popular 6922/e88cc circuit plugin w/ low level texture reveal + record style intimacyaudio grade and full gm test match balance leak short grid gas lifetime+ 130/130~115/130 (65+)authentic gt brit etch codes! ships worldwide well packed w/ plain (or branded) tube boxes ~see our other mullard listings for alernate listening positions! best offer enabled~~caliacoustics~ ~stereos amps vocals instruments tube mics lofi hifi and morebright / warm tone vintage e88cc 6dj8 ecc88 6922 plugin apps~ ~rodemics liquid platinum woo audio aesthetix cat audioresearch arc ear herron decco lector manley horizons echo bluemics conrad frontiers pathos vac and more!~

  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:    MULLARD................................................... PRODUCTION CITY:                                    BLACKBURN ENGLAND TUBE TYPE:   6DJ8 DESIGNATION:                                              RED LABEL YEAR:     1976 MONTH:   NOV Date code match    YES SILK SCREEN CONDITION %:                   100% MICA:   2 PLATES:   GREY CURVE TRACER ma:                    TUBE 1      34ma AND 36ma AT 90PV AND 0G CURVE TRACER ma:                    TUBE 2      35ma AND 34ma AT 90PV AND 0G TRANCONDUCTANCE:                TUBE 1      1290µmhos AND 1360µmhos TRANCONDUCTANCE:                TUBE 2      1325µmhos AND 1290µmhos PERCENTAGE OF BOGEY:          TUBE 1              103% AND 109% PERCENTAGE OF BOGEY:          TUBE 2              106% AND 103% SINGLE/PAIR/QUAD/MULTI:   PAIR GETTER:                                                         A FRAME DIMPLE GETTER DATE CODE                                                   B 6 K 5 JUST ONE THING TO KEEP IN MIND. THEY ARENT MAKING THESE ANY MORE. THIS IS THE HEIGHT OF MULLARD TUBE PRODUCTION AND THE CULMINATION OF YEARS OF THE BEST MINDS IN SCIENCE WORKING FOR DECADES TO PERFECT THE MATERIAL, WORKMANSHIP, AND PROCESSES THAT CREATED THE FINEST VACUUM TUBES EVER MADE. I HUNT THESE JEWELS DOWN LIKE SHERLOCK HOLMES, USING ALL MY KNOWLEDGE TO FIND THEM IN VARIOUS SURPLUS SCIENTIFIC EQUIPMENT. THERE WILL COME A DAY WHEN THERE ARE NO MORE LEFT. THIS PAIR WILL LAST 10 THOUSAND HOUR GIVE OR TAKE A FEW HUNDRED HOURS.  THEY ARE WORTH EVERY PENNY. BLACKBURN examples of tube perfection. These pairs are super strong testers. Sonically they are AWESOME! I listened to them for hours, Led Zep, Pavarotti, Tony Bennett, Barry white. These tubes deliver the goods. I compare them to Siemens and Telefunkens. Very tight Highs. The warm but most accurate mids. A little bass compression but not bad. Absolutely no microphonics! Normal 0 false false false EN-US X-NONE X-NONE Heres what Joe of Joes Tube Lore has to say about these tubes: Mullard 6DJ8,  Great Britain (shield, steel pins) One of my pair of these died a year ago  (moment of reverent silence please....) so I couldn’t compare it directly to the  others in this shoot-out. Given the vagaries of long distance auditory memory  I will not comment on specifics other than to say I remember it as quite good  and worth checking out if you get the chance. -  Normal 0 false false false EN-US X-NONE X-NONE On my tester a B&K 747 tester:    Below 55 = BAD      55-66 = ?     65 -100 = Good     100-120+ = NOS *********************************************************************************** IMPORTANT NOTE ON FILLING ORDERS With NOS tubes we will substitute NOS American tubes with NOS American of a different brand to fill an order if we are short the brand listed. If you are brand sensitive let me know BEFORE you order.  NOTES ON PHOTO PROPS:  THE RCA DOG, AND PHONO ARE NOT PART OF THE SALE. THIS IS TRUE OF ANY PROPS USED IN PHOTOGRAPHY IN THE LISTING THAT ARE NOT SPECIFICALLY CALLED OUT IN THE LISTING AS ITEMS FOR SALE. NOTES ON PHOTOS FOR SINGLE TUBES: IF YOU ARE BUYING A SINGLE TUBE: FOR THE MOST PART WITH TUBES UNDER 15 DOLLARS WE ARE USING STOCK PHOTOS FOR SINGLES. YOUR MILEAGE MAY VARY. YOU WILL RECEIVE A NEW TUBE. IT WILL TEST NOS. IT MAY OR MAY NOT BE ONE OF THE ONES IN THE PICTURE. WE GET TUBES IN ALL THE TIME. WITH SINGLES OF A LOW VALUE WE ARE NOT PICKY ABOUT DATES AND CONSTRUCTION AND THINGS LIKE THAT. WE ALSO MAY SUBSTITUE A TUBE BY A DIFFERENT MANUFACTOR IF WE ARE LOW ON STOCK OF THAT BRAND SUCH AS AN RCA FOR A GE FOR EXAMPLE, BUT WE WILL NOT SEND A JAPANESE BRAND FOR A USA MADE TUBE, OR A LOWER QUALITY TUBE IN ANY WAY. IF WE ARE SELLING A PAIR, OR A HIGH VALUE SINGLE THEN WE GET SERIOUS ABOUT SUCH THINGS.  NOTES ON MATCHING: 1. TRIODES SIMILAR TO 12AX7 ARE DONE ON A TEKTRONIX 576 CURVE TRACER IF I HAVE MATCHED THEM WITH THIS MACHINE I GUARANTEE THAT THESE MATCHED PAIRS WILL BE NOT BE ABLE TO DIFFERENTIATED WITH THE HUMAN EAR IN A PREAMP CIRCUIT.  2. ON OTHER TUBE I USE A CALIBRATED HICKOK 600A TO MATCH TUBES. 3. ON MODERN TUBES, FOR WHICH THE 600A CANNOT PERFORM TESTS, I USE THE CALIBRATED B&K 747B TUBE TESTER. 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. NOTES ON 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 4. HICKOK 600A DYNAMIC MUTUAL CONDUCTANCE TUBE TESTER  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 NOTE!!! 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. NOTE 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.  8. NOTE. 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. NOTES ON CUSTOMER RELATIONS: 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. NOTES ON RETURNS: 1.  NOTE: 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.2. NOTE: We almost always have a replacement available of the same or sometimes even higher quality. Please note that it is our desire TO DO BUSINESS! We never rip anyone off.......EVER. 3. NOTE: 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.4. NOTE: 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.5.    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. 6. NOTE: 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!!! 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. NOTE: 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 NOTE: International buyers if you bought more than one item and want combined shipping it will ship in 2 days.4. NOTE: 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 GEMSTHESE ARE THE SPECIFICS OF THE TUBE/TUBES/PARTS FOR SALE THESE ARE THE TUBE/TUBES/PARTS FOR SALE:  MANUFACTURER:                              MULLARD PRODUCTION CITY:                                    MATSUSHITA JAPAN TUBE TYPE:   6DJ8, ECC88 DESIGNATION:                                             SERVICE MASTER LABEL YEAR:     1971 MONTH OR WEEK     25 Date code match    YES SILK SCREEN CONDITION %:                    100% MICA:   2 PLATES:   GREY GM%:   117%,118% AND 118%,117% SINGLE/PAIR/QUAD/MULTI:   PAIR GETTER:                                                         O GETTER DATE CODE                                                    157 0125 MADE IN JAPAN ON MULLARD EQUIPMENT FOR AMPEREX Here is a pair of the finest JAPANESE 6dj8s, 6922s made. These tubes were made at the end of the vintage era. I think it is better to buy any manufactured goods that were made at the end of of the run. Here is why: After a product is first made there are problems and bugs. As time goes by those bugs are worked out and the product gets refined. The end products are inevitably better than the first. My dad worked at GM for decades and he always told me not to buy the first year run of any model for that very reason. These particular tubes are among the last to be made in the Blackburn plant and have the advantage of being the pinnacle of the line.  Sonically they are AWESOME! I listened to them for hours, Led Zep, Pavarotti, Tony Bennett, Barry white. These tubes deliver the goods. I compare them to O getter Orange Globes. Very whispey Highs. The warm homey mids. Bass is fat and sweet. Absolutely no microphonics! HISTORY: This is a Matsushita vacuum tube/tubes made for Mullard/Amperex in Matsushita Japan. After WWII tube manufacturers in Europe and the US shipped their tube making equipment to Japan to take advantage of the lower labor costs. Amperex, Mullard, and Raytheon made millions of tubes in Japan. These tubes were made on the same equipment with the same materials, and the same construction methods used to make the Mullards and Bugle boys that we love so much. These tubes have the same quality and the same excellent tone, and longevity as the Europeans and American made 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        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