For your consideration are two GE JG 6072A with triple mica, black plates and matching date codes of 62-25. These tubes were tested on a Hickok 539C where the minimum reading is 1100gm and the reading for a new tube is 1692gm or better. The tubes tested at 2000gm/2100gm & 2100gm/2100gm

Electro-Harmonix Tube / Valve - 12AY7 / 6072A - Amplifier. Working valve taken from Laney LC15 amp.

I have 1 Excellent very strong general electric black plate 6072a / 12ay7 tube

2 x 6072A (12AY7) G.E. Tubes Made in USA Black Plates Thick Foil O getter The lettering may be smudged/missing Tested on enhanced Triplet E3444 Laboratory Tester Results =1600/1650 micromhos @ 2.4/2.5 mA1630/1600 micromhos @ 2.5/2.5 mA Bogey(100% or New) = 1700/1700 micromhos @ 3.0/3.0 mA The measurements in this listing were taken on a Triplett 3444 modified to test the tube as an amplifier in accordance with RMA/EIA specifications, utilized by all US and most foreign tube manufacturers. This tester applies test conditions for this tube as shown below (including the precise filament voltage) and then measures transconductance (gm) in accordance with the engineering definition of gm. Tubes may also be operated under the test conditions for extended periods to be sure that it is stable. A tube must be tested in this manner to compare its test results with the manufacturer’s original intent or with other tubes of the same type. Most tube testers do not apply the test conditions required or conduct a valid gm test. For more details on the test and our test equipment, please contact us.The test conditions for this listing are__250_Volts plate, __250_Volts screen, ___-4.0___Volts bias or Cathode resistance*What were your tubes tested at? ***Ask any questions before buying, not after*** I do combine S&H

GE JAN 6072A Vacuum Tube black plates solid disk getter Tested Excellent. Excellent testing vintage vacuum tube. Satisfaction guaranteed returns accepted Lot B30

I am selling this GE 6072A Five Star 12AY7 vacuum tubes in GE box but maybe used. Has double mica and larger round getter. We tested the on Dynajet with following results. 74/74 with 60 as minimum good. The dynajet is fast and tends to give a good reading on this type of vacuum tube. It should work well in many applications.

I have 1 Excellent perfect balanced GE black plate 6072A tube.This tube test 48-48 where 32 is the minimum good and new tubes test 48 to 50 on are tv7 tube tester.

Wir haben deinradio! Senden Sie uns eine Nachricht Unser Shop Verkäuferprofil Bewertungen Shop speichern Kontakt 2x 6072A Röhre 12AY7 seltene Version geprüft top Röhrenverstärker 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

This eBay sale is for ONE (1) Vacuum Tube / Valve( UK ) / Rohre( DE ) / Lamp( EEU ) Calibrated TV7 Tested -ONE (1) GE 6072A (Mil-Speced Premium 12AY7 ) Twin Triode Vacuum Tube - Date Coded RT in ink on glass = Nov. 1964- Fat Boxed Black Plates 14mm height- Two thick spiked mica spacers- top of the connection pins have Copper support Rods, thick metal support rods connecting and supporting the mica spacers.- Top side thick metal filled Halo saucer Getter- Amplification Factor 44/44 Mu (medium Mu Twin Triode)- The GE 6072A & GL-6072 tube types are special designed tubes intended for low-level stages of high-gainAudio Frequency amplifiers. Designed for dependable life and reliable service for avionics aircraft , mobile communications, and musical instrument amplifiers to withstand close proximity to heavy speaker vibrations .- Designed as a Low Noise, Low Microphonics tube. Condition: Lightly Used TV7 tested Strong and Balanced, Clean Pins. Plug-In and Play condition.Comes in a vintage period correct GE box which we re-labeled with test results printed. TV7 Test results: NO SHORTS, NO Gas, NO Leakage, NO Apparent Micro-Phonics detected TV7 Minimum good value for Transconductance (Gm) is 32/32 = 800/800 uMhos. The stated GE Factory NOS reading is when tested at higher Plate Supply Voltage of 250VDC = 1,750/1,750 uMhos (Gm)at 3.0/3.0 mA (Anode Plate Current). (each section : S = 1,75 mA/V Ia = 3.0)ALL TV7 versions test at a maximum of 150VDC Plate Supply Voltage. This tube tested at 150VDC Plate Supply Voltage -which is max PSV voltage for all TV7 versions : Plate 1: 51.5/32 = 1,287.5 uMhos Transconductance (Gm) at 2.9 mA (Anode Plate Current dissipation)Plate 2: 53.4/32 = 1,335.0 uMhos Transconductance (Gm) at 2.7 mA (Anode Plate Current dissipation) Our test set : Recent Dan Nelson Calibrated (11/11/2021), restored and upgraded TV7 with Digital Meter reading Transconductance in uMhos (Gm) and mA (Anode Plate Current).TV7 settings:607212.6EV7-608015-B332Triode #1.607212.6EV2-103015-B332Triode #2. The GE 6072A version (and RCA & Tung-Sol 6072/A versions) were a Twin Triode with 44/44 MU Amplification factor. The 6072A was a Military/ Industrial Rigidized Long-life Twin Triode vacuum tube. Made for critical installations where vibration and G-force was high especially for mobile military equipment, avionics equipment and musical instruments amplifiers. The 6072 is a premium upgraded version of a 12AY7 tube. A GL-6072 6072 6072A are one of the best Vintage tube versions of 12AY7 tubes to install into a Musical Instrument Amplifier to handle high output Speaker vibration. The 12AY7 tube was used in many Early Fender Tweed Amplifiers. Also believed to be used in several Gibson early model musical instrument amplifiers. Bogey : Average NOS Factory when new - listed in all 3 Factory Data sheets from manufacturers GE / RCA/ Tung-Sol for the GL-6072 6072 and 6072A tube type states typical Operation & Characteristics for Amplifier- Class A1 when tested at Plate Supply Voltage 250Volts : Gm Transconductance = 1,750/1,750 uMhos at 3.0/3.0 mA Anode Plate Current.( S = 1,75 mA/V Ia = 3.0 mA ). *** WE COMBINE SHIPPING on Multiple Tube Purchases which SAVES $ on Shipping Costs which We refund at time of Payment. WE ARE LISTING MANY SINGLE VINTAGE GL-6072 6072 6072A Tubes by various USA Manufacturers such as GE RCA Tung-Sol Sylvania Hytron CBS Westinghouse. WE PACK VERY WELL AND SHIP VERY FAST (one day or same day)Low cost Shipping USPS 1st class, Low cost International shipping via eBay International Economy small package Service space available AIR-FREIGHT(allow 10days to 6weeks for delivery depending upon which World region box is delivered to). The Americas and Europe are fast.ASIA 2nd fastest. Austrialia /NZ / Pacific Islands about 3-4weeks delivery. West Asia/Middle East allow 6weeks.

General Electric JG-6072A Lot Of 3Matching date codes. Tested good on a Heathkit TC-2.View all images before purchase. MB02

For your consideration are two GE JG 6072A with triple mica, black plates and matching date codes of 62-25. These tubes were tested on a Hickok 539C where the minimum reading is 1100gm and the reading for a new tube is 1692gm or better. The tubes tested at 2000gm/2100gm & 2100gm/2100gm

Up for sale : WOW 100% brand new old stock Vintage 1965 USA made exact matched QUAD in Mint condition. These 4 tubes have the exact same factory codes . Made the same day at the factory . Each tube works the very best & will sound Fantastic / 100% Guaranteed . Very high grade 6072A / 6072 Tubes . Made WITH Black Plates / Low Noise supports Codes are the same on each tube of 1965 Week 41 (65-41) - 188-5 With 66-09 Stock codes Matched each tube has these same codes . ALL 4 tubes tested Very close to each other and super closely balanced . ALL 4 tubes have perfect logos You get the 4 tubes you see in the photos PLUS THE 4 ORIGINAL FACTORY BOXES for the Price 100% guaranteed Perfect matched QUAD JG 6072A tubes . Absolutely the Very best Matched QUAD VERY HIGH GRADE VINTAGE TUBES . Few more NOS NIB MATCHED QUADS Available

NOS GE 6072A 5 Star Black Plate Triple Mica Vacuum Tube NIB. These are the best version and extremely rare. Price is for a single tube. A total of five are available from the same sleeve. Tubes test NOS and are unused.

USED 6072A G.E. 5-Star Twin Triode 2-mica, black plates, USA Date code is rubbed away, probablymade in 1960s. Transconductance readings: 95/87 Tested for transconductance with B&K 747Good/green on meter is 65-120100 meg ohm grid emission testTube is allowed to heat and then gentlytapped to check for mechanical shorts.No grid emission, gas, or mechanical shorts. Life test good This tester is set to factory specs and checkedregularly. The item in the picture is the actual item that the buyer will receive. Securely packed for shipment. I will be happy to answer any questions

This auction is for 2 pcs new, NOS CK6072A (12AY7) Raytheon, Made in USA, with black ribbed plates and triple micas. They come in very safe military foam boxes. Tested on my valve characteristic meter AVO Mark 4.Printed on both tubes is 01... 280... 72 22...Tube1: Ia1=3,0mA gm1=1,7mA/V Ia2=4,2mA gm2=2,0mA/V Tube2: Ia1=4,4mA gm1=2,2mA/V Ia2=3,5mA gm2=2,0mA/VPay by PayPal or a banktransfer to my account. Shipping worldwide is 13 USD. Due to Russian war in Ukraine I will not ship to Russia or Belarus Please feel free to email me if you have any questions!

Used for about 4 hours, works perfectly as new. The previous owner selected this tube for low noise / low microphonics. I used it in a microphone and can confirm that the noise is low, but still audible at higher gains on your preamp. Since I dont have the means to test the tube, Im offering a full refund if it doesnt meet your expectations. Thanks for looking!

This offer is for 2 pieces 2 x 6072 (12AY7) GE - Made in USA late 50s - black plates - 5 star tubes 1 x 6072 GE- black plates - 3 mica - D getter - code : :..:1 x 6072 GE - black plates - big closed O getter - 5 stars - 63-30 188-4 - 63-07 tested on Sencore Mighty Mite II - TC114 Tubetester + Funke W18 very good/goodno guarantee for 50/60/70 years old tubes (for the sound/hum etc.) no discuss/warranty about results of other tube-tester (all tester/countries/voltage is different)!There is no warranty or returns based on what any other tube tester reports. Important to know!EXPRESS SHIPPING: USPS for the US (45 USD) 3-7 working days USPS for Canada (43 USD) 3-8 working days TNT/FedexAsia/Australia (55 USD) 3-7 working days EU and Europe (17 USD) nothing changed 7-14 working days

Röhren 12AY7 = 6072A / Pair - 2 St. TAD-Label, Premium SelectionBalanced, Matched, Neu in BOX

For sale is this Strong matched pair of GE 12AY7 / 6072A broadcast grade 12AY7 vacuum tubes, they look equal, both with anti-microphonic support rods. They are marked 12AY7. test strong on our calibrated Jackson 648A tester

YOU GET THE TUBE YOU SEE IN THE PHOTOS PLUS THE FACTORY BOX . THIS TUBE IS MADE WITH LOW NOISE SUPPORTS & 3 MICAS . THIS BLACK PLATE TUBE WILL SOUND FANTASTIC NOS NIB JG 6072A

I am selling this GE 6072A Five Star 12AY7 vacuum tubes in GE box but maybe used. Has triple mica and round getter. We tested the on Dynajet with following results. 74/75 with 60 as minimum good. The dynajet is fast and tends to give a good reading on this type of vacuum tube. It should work well in many applications.

Up for sale : Absolutely excellent Matched Pair 6072A 3 Mica Square [] Getter tubes / Black Square Plates Both tubes working Great with Close balanced Matched Plates . No leaks no shorts with 45,45 Minimum to work good they tested 82,80 81,82 with 80,80 = NOS results These 2 tubes will Sound Fantastic and Perform Great for a very long time . each tube has 100% life . These 2 tubes are made the exact same design and Plate Structure You get the 2 tubes in the Photos for the Price

Röhren 12AY7 = 6072A / Pair - 2 St. TAD-Label, Premium SelectionBalanced, Matched, Neu in BOX