Five (5) 5Y3GT Admiral by RCA vintage vacuum tubes, made in USA, all are black smooth plates, clear top, bottom side rectangular getter, tubes tests: 92, 90 %92, 94 %90, 92 %90, 86 %88, 92 % Price is for all tubes pictured. We test all tubes we sell! We will combine shipping! Check out my other tubes!Scale 1-100, good quality percentage on my Triplett starts at 54.

One (1) 6CG7 Admiral by Raytheon vintage vacuum tube, made in USA, tube has grey ribbed plates, top O getter, tube tests: 86, 86 % Price is for all tubes pictured. Tube did not have original box, I assume it as used. Scale 1-100, good quality percentage on my Triplett starts at 54. We test all tubes we sell! We will combine shipping! Check out my other tubes!

PHILIPS EL51 - QUAD MATCHED PAIR - NOS NIB AUDIO TUBE VALVE. Extremely rare quad find. Tested for function. Holy Grail. Selling as 4.

2 X MULLARD PL81Application as a Line Output Valve in vintage TV HT power supplies ( as thats its original design application ) Can also be used in Valve / tube amp audio output stages and in Radio transmitting RF output stagesThe PL81 was also used in the 1950s in various Philips PA Amps ( although the EL81 is more commonly used in those applications) As a line output valve in television service, the peak anode surge voltage is 7,000 Volts. The anode dissipation is 8?Watts.Mullard also specify the PL81 for use as a series pass element in voltage regulators ( As found in many DIY designed, Radio transmitter power supplies ) Electronically a close Matched pair, AVO MK3 tested TEST TO NOS SPEC / NO SHORTS ETC. LIFE & EMISSION TEST VERY STRONG MADE BY MULLARD / BLACKBURN / GREAT BRITAIN BASE CODES: B8G1 & B1K SENSIBLE / DIRECT EQUIVALENT FOR: 21A6 - CV5077 - N152 - N359 THESE VALVES HAVE BEEN IN LONG TERM STORAGE AND MAY HAVE STORAGE / USER MARKS FOR VALVE AMPLIFIER, HAM RADIO, TV AND OR OTHER ELECTRONIC EQUIPMENT, PLEASE SEE PICTURES ABOVE ( REGARDING CONDITION ETC. ) ALL ITEMS ARE TESTED AND IN GOOD WORKING ORDER UNLESS STATED OTHERWISE The item / items, will be well packed in a Box, in order to ensure arrival in correct condition. Note!!: Items cannot be sent to a PO Box address etc. All items require a signature upon delivery Garrard at6 at60 401 301 turntable record deck eddystone aeg siemens bt boat anchor commercial communication receiverr1155 B&O FERROGFAPH NAGRASHARMANS SWR 006 HAM CB SWR MTR 1.8-160 140-525MHz MFJ-269 Multi-function SWR Analyzer for r1155 B&O FERROGFAPH NAGRASHARMANS SWR 006 HAM CB SWR MTR 1.8-160 140-525MHz MFJ-269 Multi-function SWR Analyzer SWR meter 1.8 200 Comet CMX-2300 Twin Cross Mhz Power Master 3KW PoweRBIRD POWER vintage antique coil fieldcoil stentorian tanoy elac goodmans lancaster rola celestion jbl 8 12 4 16 5 9 pentode triode ww1 ww2 WWll WWl 1914 1918 1940 19451 vintage antique GPO MORSE TELEGRAPH KEY px25 cv1178 da30 do30 nr56 do26 44xp cv563 braun cv1679 pp5/400 vr40 marshall fender gibson selmer orange nordmende gross super rigonda riga vega stereo decoder saba telefunken opus 6j5 6c5 l63 d4 mh4 354 valve valves valvua Röhre Röhren buis buizen zender ontvanger KW 200 transmatch ham radio ham dx transceiver yaesu icom orange valve amp amplifier rogers kadet vox bbc crystal receiver px4 lp4 selmer philips Philips 634A Lentebode ecko EKCO AC76 breadboard radio coils if transformer Technics SP10 Mk2 SH-10E Marantz TT1000 klyne zpx Technics 1210MK5G Ortofon TA-100 Tonearm sme v garrard 301 401 linn ekos se Linn Uphorik jvc ql-y5f Shure V15 Type IV cartridge ecc83 ecll800 px4 leak tl12 quad roger vox ac30 marshal marshaall marshal fender truvoice selmer gibson guitar valve amp amplfier leak a rogers rogers gelos geloso transmitter kw transceiver hiwatt amperex heerlen philips phillpis b&o bang & olufsen tandberg fisher grundig linn mullard ultra linear push pull transformer px4 px25 lp4 ac044 aco44 telefunken bugelboy bugel boy black plate long plate doible triode triode pentode double ecll800 ell800 ecl86 ecl82 ecc83 e88cc 6as7 diy valve amp amperex brimar TRF RECEIVER WEGA RADIO NORDMENDE GRUNDIG CRYSTAL RADIO 1920S HOMEBREW RADIO RESTORATION VINTAGE WIRELESS MARCONI COSSOR OSRAM PHILCO DERWENT ECKO PYE BURNDEPT DENCO ARS RCA R&A PX25 PX4 MOV T.M.C. HYDRA ferranti bat resistors colpak ediswan crt bth eddystone lesdix voigt atr bulgin fluxite hivac dubilier moving coil meter permanent magnet porcelain isolator codar ar88 r1155 t1154 raf condensor 2 gang 3 gang multi gang ganged capacitor radio reception coil shortwave short wave radio valve tube breadboard coherer spark transmitter steampunk eddystone aeg siemens bt boat anchor commercial communication receiverr1155 B&O FERROGFAPH NAGRASHARMANS SWR 006 HAM CB SWR MTR 1.8-160 140-525MHz MFJ-269 Multi-function SWR Analyzer for r1155 B&O FERROGFAPH NAGRASHARMANS SWR 006 HAM CB SWR MTR 1.8-160 140-525MHz MFJ-269 Multi-function SWR Analyzer SWR meter 1.8 200 Comet CMX-2300 Twin Cross Mhz Power Master 3KW PoweRBIRD POWER vintage antique coil fieldcoil stentorian tanoy elac goodmans lancaster rola celestion jbl 8 12 4 16 5 9 pentode triode ww1 ww2 WWll WWl 1914 1918 1940 19451 vintage antique GPO MORSE TELEGRAPH KEY px25 cv1178 da30 do30 nr56 do26 44xp cv563 braun cv1679 pp5/400 vr40 marshall fender gibson selmer orange nordmende gross super rigonda riga vega stereo decoder saba telefunken opus 6j5 6c5 l63 d4 mh4 354 valve valves valvua Röhre Röhren buis buizen zender ontvanger KW 200 transmatch ham radio ham dx transceiver yaesu icom orange valve amp amplifier rogers kadet vox bbc crystal receiver px4 lp4 selmer philips Philips 634A Lentebode ecko EKCO AC76 breadboard radio coils if transformer Technics SP10 Mk2 SH-10E Marantz TT1000 klyne zpx Technics 1210MK5G Ortofon TA-100 Tonearm sme v garrard 301 401 linn ekos se Linn Uphorik jvc ql-y5f Shure V15 Type IV cartridge ecc83 ecll800 px4 leak tl12 quad roger vox ac30 marshal marshaall marshal fender truvoice selmer gibson guitar valve amp amplfier leak a rogers rogers gelos geloso transmitter kw transceiver hiwatt amperex heerlen philips phillpis b&o bang & olufsen tandberg fisher grundig linn mullard ultra linear push pull transformer px4 px25 lp4 ac044 aco44 telefunken bugelboy bugel boy black plate long plate doible triode triode pentode double ecll800 ell800 ecl86 ecl82 ecc83 e88cc 6as7 diy valve amp amperex brimar TRF RECEIVER WEGA RADIO NORDMENDE GRUNDIG CRYSTAL RADIO 1920S HOMEBREW RADIO RESTORATION VINTAGE WIRELESS MARCONI COSSOR OSRAM PHILCO DERWENT ECKO PYE BURNDEPT DENCO ARS RCA R&A PX25 PX4 MOV T.M.C. HYDRA ferranti bat resistors colpak ediswan crt bth eddystone lesdix voigt atr bulgin fluxite hivac dubilier moving coil meter permanent magnet porcelain isolator codar ar88 r1155 t1154 raf condensor 2 gang 3 gang multi gang ganged capacitor radio reception coil shortwave short wave radio valve tube breadboard coherer spark transmitter steampunk eddystone a

VINTAGE, MATCHED PAIR 2 x MULLARD PL300 VALVE / TUBE DOUBLE RING SIDE GETTER DIRECT EQUIVALENT TO: 35FN5 - CV10783 NEW OLD STOCK / UNUSED Tested on a Sencore 162 MK7 TEST TO NOS SPEC. / 100% No shorts etc., life test Excellent, Gas test good THESE ITEMS HAVE BEEN IN LONG TERM STORAGE, AND MAY HAVE DUST / STORAGE MARKS / USER MARKS ETC. PLEASE SEE PICTURES ABOVE FOR FURTHER DETAILS, REGARDING THE PHYSICAL CONDITION Note!! 20% import / VAT tax applies to EU buyers, all other International buyers may also have to pay Import Tax etc. This is now automatically added by E-bay. All items will be well packed and send in a box with plenty of packaging material All items are send via tracked and or signed for Royal Mail postage service All items have been tested and are sold in working condition, unless otherwise stated in the description. Items can not be sent to a PO box

One (1) No type 24 Super Airline vintage vacuum tube, ST shape, made in USA, tube has mesh plates, clear top, bottom side foil getter, engraved base, mica snubbers, tube tests: 76 % Tube did not have original box, I assume it as used. We test all tubes we sell! We will combine shipping! Check out my other tubes! Tested on Triplett tube tester for shorts and leaks as well. Scale 1-100, good quality percentage on my Triplett starts at 54. Normal 0 false false false EN-US X-NONE X-NONE

One (1) type 227 Airline Globe shape vintage vacuum tube, made in USA, tube has black smooth plates, side foil getter, engraved base, tube tests: 70 % Tube did not have original box, I assume it as used. We test all tubes we sell! We will combine shipping! Check out my other tubes! Tested on Triplett tube tester for shorts and leaks as well. Scale 1-100, good quality percentage on my Triplett starts at 54. Normal 0 false false false EN-US X-NONE X-NONE

Tested on a fully restored TV7-DU, by Dan Nelson, pictures of evidence for this included in the listing. It was restored and calibrated on October 21st 2021. Tubes are tested for shorts. PC= Plate Current DC= Date Code Please note, TV7 data minimum is equal to 60%. For example, (insert model number here) min value 60. If the tube tests at minimum 60, that is equal to 60%. The number over (/) is the minimum test data result as described in the TV7 DU tube testing manual. So 60/ (min) 60 = 60% high testing, it has some stain on the glass. Paint or something 1. 122/50 PC 14.3 105/50 PC 12.2 2. 107/50 PC 12.2 107.5/50 PC 12.5 I mark all my tubes, so please dont waste your time seeking to send me back your old dead tubes. All testers read differently. I have sought to have my tester as accurate as possible. I will not be giving partial refunds because you have received different test result. All tubes will be shipped well, an example of how I pack is pictured in the listing. (obviously these tubes are not included) I wont be lying on a customs form I combine shipping. If the tubes are of significant value, the postage will be extra due to insurance.

Tested on a fully restored TV7-DU, by Dan Nelson, pictures of evidence for this included in the listing. It was restored and calibrated on October 21st 2021. Tubes are tested for shorts. PC= Plate Current DC= Date Code Please note, TV7 data minimum is equal to 60%. For example, (insert model number here) min value 60. If the tube tests at minimum 60, that is equal to 60%. The number over (/) is the minimum test data result as described in the TV7 DU tube testing manual. So 60/ (min) 60 = 60% 1. 45/32 PC 4.944.4/32 PC 4.9 2. 45.9/32 PC 5 49.2/32 PC 5.4 I mark all my tubes, so please dont waste your time seeking to send me back your old dead tubes. All testers read differently. I have sought to have my tester as accurate as possible. I will not be giving partial refunds because you have received different test result. All tubes will be shipped well, an example of how I pack is pictured in the listing. (obviously these tubes are not included) I wont be lying on a customs form I combine shipping. If the tubes are of significant value, the postage will be extra due to insurance.

Tested on a fully restored TV7-DU, by Dan Nelson, pictures of evidence for this included in the listing. It was restored and calibrated on October 21st 2021. Tubes are tested for shorts. PC= Plate Current DC= Date Code Please note, TV7 data minimum is equal to 60%. For example, (insert model number here) min value 60. If the tube tests at minimum 60, that is equal to 60%. The number over (/) is the minimum test data result as described in the TV7 DU tube testing manual. So 60/ (min) 60 = 60% 1. 43/32 PC 4.8 44.7/32 PC 4.9 2. 47/32 PC 5.2 44.8/32 PC 4.9 I mark all my tubes, so please dont waste your time seeking to send me back your old dead tubes. All testers read differently. I have sought to have my tester as accurate as possible. I will not be giving partial refunds because you have received different test result. All tubes will be shipped well, an example of how I pack is pictured in the listing. (obviously these tubes are not included) I wont be lying on a customs form I combine shipping. If the tubes are of significant value, the postage will be extra due to insurance.

Tested on a fully restored TV7-DU, by Dan Nelson, pictures of evidence for this included in the listing. Tubes are tested for shorts. PC= Plate Current DC= Date Code Please note, TV7 data minimum is equal to 60%. For example, (insert model number here) min value 60. If the tube tests at minimum 60, that is equal to 60%. The number over (/) is the minimum test data result as described in the TV7 DU tube testing manual. So 60/ (min) 60 = 60% 1. 53/31 PC 32.6 2. 51.3/31 PC 31.6 I mark all my tubes, so please dont waste your time seeking to send me back your old dead tubes. All testers read differently. I have sought to have my tester as accurate as possible. I will not be giving partial refunds because you have received different test result. All tubes will be shipped well, an example of how I pack is pictured in the listing. (obviously these tubes are not included) I wont be lying on a customs form I combine shipping. If the tubes are of significant value, the postage will be extra due to insurance.

Three (3) 6CG7 Admiral by Raytheon vintage vacuum tubes, made in USA, all are black ribbed plates, top D getter, tubes tests: 88, 88 %88, 88 %88, 88 % Price is for all tubes pictured. We test all tubes we sell! We will combine shipping! Check out my other tubes!Tubes are tested for emission, as well as for shorts, life test and grid leakage on calibrated Sencore Mighty Mite tube tester, on scale 1-120, good quality on my Sencore starts at 70.

CARBON TRINITY HYBIRD VALVE AMPLIFIER FATMAN BY TL AUDIO MAD FOR IPODCARBON TRINITY HYBIRD VALVE AMPLIFIER Hybird Valve Amplifier Carbon Trinity. Fatman by AL Audio.bought new & never used (never plugged-in), original box, no literature (still looking for it). Will Insure for bid amount.Please see my other items listed separately. I do combine shipping. Bid with confidence I have 100% positive feedback. Your comments are appreciated. Any questions please ask.Please leave positive feedback an as many stars as possible, it all helps. Thanks for bidding and good luck. Please read my Auction Other Tips (below) before bidding on this item.AUCTION OTHER TIPSPayments due within 4 days of auctions endPostal rates are for US shipping only. Canada & International please ask before biddingI combine shipping on all orders whenever possible I take great care to describe all items to the best of my ability.All photos are of actual items. Satisfaction guaranteed! If for any reason you have any kind of a problem, please share it with me and I will do my best to resolve it for you. If you would like more pictures me, send me an e-mail and I would be happy to send them to you.

6SN7 Pair Ge tubes tested Nos Nib Preamp valve Hifi Audio tested above new spec DESCRIPTION As I am no expert some items are unique ican not always know everything about them and will describe them the best ican and give as many pictures as i can to form part of the description. ifyou require anymore information please dont hesitate to ask PLEASE WAIT TO RECEIVE AN INVOICE BEFORE SENDINGPAYMENT !!!!! We try very hard to estimate shipping for our items however once packed can bemuch bigger than we thought so our postage is an estimate only!! SHIPPING We are always working hard to ensure yourpackage arrives as soon as possible. Please understand that some factors likeweather, high postal traffic, and the performance of shipping companies areoutside of our control. We pack ouritems very very well and are world renound for doing so. we go well out of ourway to make sure your item is received as described with no damage and prideourselves on it. PAYMENT We only accept Paypal and most major credit cards through Paypal as it?s themost convenient and secure way of transferring funds for both the customer andthe seller.CUSTOMER SATISFACTION We try our very best to make sure every customer is completely satisfied.please read the description CAREFULLY If you have a problem or questionregarding your transaction please contact us before leaving any type offeedback. We will work with you to resolve any problem you may have.

Pair Of Valve Sockets For 211 845 For amplifier Hifi Audio DESCRIPTION As I am no expert some items are unique ican not always know everything about them and will describe them the best ican and give as many pictures as i can to form part of the description. ifyou require anymore information please dont hesitate to ask PLEASE WAIT TO RECEIVE AN INVOICE BEFORE SENDINGPAYMENT !!!!! We try very hard to estimate shipping for our items however once packed can bemuch bigger than we thought so our postage is an estimate only!! SHIPPING We are always working hard to ensure yourpackage arrives as soon as possible. Please understand that some factors likeweather, high postal traffic, and the performance of shipping companies areoutside of our control. We pack ouritems very very well and are world renound for doing so. we go well out of ourway to make sure your item is received as described with no damage and prideourselves on it. PAYMENT We only accept Paypal and most major credit cards through Paypal as it?s themost convenient and secure way of transferring funds for both the customer andthe seller.CUSTOMER SATISFACTION We try our very best to make sure every customer is completely satisfied.please read the description CAREFULLY If you have a problem or questionregarding your transaction please contact us before leaving any type offeedback. We will work with you to resolve any problem you may have.

Tested on a fully restored TV7-DU, by Dan Nelson, pictures of evidence for this included in the listing. It was restored and calibrated on October 21st 2021. Tubes are tested for shorts. PC= Plate Current DC= Date Code Please note, TV7 data minimum is equal to 60%. For example, (insert model number here) min value 60. If the tube tests at minimum 60, that is equal to 60%. The number over (/) is the minimum test data result as described in the TV7 DU tube testing manual. So 60/ (min) 60 = 60% high testing, near NOS values 1. 70.5/44 PC 76.6 2. 58.5/44 PC 75.5 I mark all my tubes, so please dont waste your time seeking to send me back your old dead tubes. All testers read differently. I have sought to have my tester as accurate as possible. I will not be giving partial refunds because you have received different test result. All tubes will be shipped well, an example of how I pack is pictured in the listing. (obviously these tubes are not included) I wont be lying on a customs form I combine shipping. If the tubes are of significant value, the postage will be extra due to insurance.

Tested on a fully restored TV7-DU, by Dan Nelson, pictures of evidence for this included in the listing. Tubes are tested for shorts. PC= Plate Current DC= Date Code Please note, TV7 data minimum is equal to 60%. For example, (insert model number here) min value 60. If the tube tests at minimum 60, that is equal to 60%. The number over (/) is the minimum test data result as described in the TV7 DU tube testing manual. So 60/ (min) 60 = 60% 52.3/30 PC 5.8 slightly loose top cap 50/30 PC 5.5 slightly loose base I mark all my tubes, so please dont waste your time seeking to send me back your old dead tubes. All testers read differently. I have sought to have my tester as accurate as possible. I will not be giving partial refunds because you have received different test result. All tubes will be shipped well, an example of how I pack is pictured in the listing. (obviously these tubes are not included) I wont be lying on a customs form I combine shipping. If the tubes are of significant value, the postage will be extra due to insurance.

Tested on a fully restored TV7-DU, by Dan Nelson, pictures of evidence for this included in the listing. It was restored and calibrated on October 21st 2021. Tubes are tested for shorts. PC= Plate Current DC= Date Code Please note, TV7 data minimum is equal to 60%. For example, (insert model number here) min value 60. If the tube tests at minimum 60, that is equal to 60%. The number over (/) is the minimum test data result as described in the TV7 DU tube testing manual. So 60/ (min) 60 = 60% Same date code 1. 52/32 PC 5.7 52/32 PC 5.7 2. 57/32 PC 6.3 54/32 PC 5.9 I mark all my tubes, so please dont waste your time seeking to send me back your old dead tubes. All testers read differently. I have sought to have my tester as accurate as possible. I will not be giving partial refunds because you have received different test result. All tubes will be shipped well, an example of how I pack is pictured in the listing. (obviously these tubes are not included) I wont be lying on a customs form I combine shipping. If the tubes are of significant value, the postage will be extra due to insurance.

Tested on a fully restored TV7-DU, by Dan Nelson, pictures of evidence for this included in the listing. It was restored and calibrated on October 21st 2021. Tubes are tested for shorts. PC= Plate Current DC= Date Code Please note, TV7 data minimum is equal to 60%. For example, (insert model number here) min value 60. If the tube tests at minimum 60, that is equal to 60%. The number over (/) is the minimum test data result as described in the TV7 DU tube testing manual. So 60/ (min) 60 = 60% high testing, near NOS values 1. 68.5/44 PC 87 2. 62/44 PC 87 I mark all my tubes, so please dont waste your time seeking to send me back your old dead tubes. All testers read differently. I have sought to have my tester as accurate as possible. I will not be giving partial refunds because you have received different test result. All tubes will be shipped well, an example of how I pack is pictured in the listing. (obviously these tubes are not included) I wont be lying on a customs form I combine shipping. If the tubes are of significant value, the postage will be extra due to insurance.

Two (2) 6LU8 Admiral vintage vacuum tubes, made in Japan, both are grey ribbed plates, top O getter, tubes tests: 96, 94 %94, 94 % Price is for all tubes pictured. We test all tubes we sell! We will combine shipping! Check out my other tubes! Tubes are tested for emission, as well as for shorts, life test and grid leakage on calibrated Sencore Mighty Mite tube tester, on scale 1-120, good quality on my Sencore starts at 70. Normal 0 false false false EN-US X-NONE X-NONE

  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:                               RCA PRODUCTION CITY:                                     JAPAN TUBE TYPE:   6RP22 DESIGNATION:                                             PREAMP TUBE YEAR:     1970 MONTH:     JULY Date code match    NO SILK SCREEN CONDITION %:                    100% MICA:    2 PLATES:    GREY GM %:     120% SINGLE/PAIR/QUAD/MULTI:     PAIR GETTER:                                                          0  GETTER                                    DATE:      07 NOS NIB. This auction is for ONE PAIR. You will receive one PAIR of these tubes. All are NOS NIB and tested by by me.   THESE TUBES ARE NOS NIB. 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

Tested on a fully restored TV7-DU, by Dan Nelson, pictures of evidence for this included in the listing. It was restored and calibrated on October 21st 2021. Tubes are tested for shorts. PC= Plate Current DC= Date Code Please note, TV7 data minimum is equal to 60%. For example, (insert model number here) min value 60. If the tube tests at minimum 60, that is equal to 60%. The number over (/) is the minimum test data result as described in the TV7 DU tube testing manual. So 60/ (min) 60 = 60% Rare set, high NOS values, same date 1. 100.5/62 PC 22.4120/62 PC 26.8 2.108.5/62 PC 24.3113/62 PC 26.6I mark all my tubes, so please dont waste your time seeking to send me back your old dead tubes. All testers read differently. I have sought to have my tester as accurate as possible. I will not be giving partial refunds because you have received different test result. All tubes will be shipped well, an example of how I pack is pictured in the listing. (obviously these tubes are not included) I wont be lying on a customs form I combine shipping. If the tubes are of significant value, the postage will be extra due to insurance.