PaymentRest assured that our store offers a variety of payment methods.Please pay within 5 days after auction is finished. About UsWe are located in Japan.For electrical products check the manufacturer and product and convert to the voltage of each country.We plan to ship by FedEx or DHL.Please contact us as the shipping fee can be changed in some cases. Its our pleasure to make you happy by proposing our recommend item.If you have any questions or request about items please feel free to ask us. International Buyers - Please Note:-Import duties taxes and charges are not included in the item price or shipping charges. These charges are the buyers responsibility.-Please check with your countrys customs office to determine what these additional costs will be prior to bidding/buying.-These charges are normally collected by the delivering freight (shipping) company or when you pick the item up - do not confuse them for additional shipping charges.-We do not mark merchandise values below value or mark items as - gifts - The US and International government regulations prohibit such behavior.>

2x Mullard ECC83 Valves Very rare pair of Mullard ECC83 manufactured in 1955 with long-plate and []-getter Date Code: mC1 B5F, mC1 B5F Tested by AVO VCM Tester Valve 1 Ia1 = 1.32(mA), gm1 = 1.55(mA/V) Ia2 = 1.45(mA), gm2 = 1.4(mA/V) Valve 2 Ia1 = 1.23(mA), gm1 = 1.5(mA/V) Ia2 = 1.48(mA), gm2 = 1.45(mA/V) NOS specification: Ia = 1.2(mA), gm = 1.6(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. 20230522L001

2x Mullard ECC83 Valves Date Code: I61 B2H2, I61 B2H2 Tested by AVO VCM Tester Valve 1 Ia1 = 0.85(mA), gm1 = 1.3(mA/V) Ia2 = 1.05(mA), gm2 = 1.4(mA/V) Valve 2 Ia1 = 1.02(mA), gm1 = 1.45(mA/V) Ia2 = 0.8(mA), gm2 = 1.3(mA/V) NOS specification: Ia = 1.2(mA), gm = 1.6(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. 20230522L017

2x Mullard 12AX7S/CV4004 Valves This pair of 12AX7S/CV4004 are with very unique box-anode construction. They are believed manufactured by Mullard Mitcham factory Tested by AVO VCM Tester Valve 1 Ia1 = 0.7(mA), gm1 = 1.25(mA/V) Ia2 = 0.8(mA), gm2 = 1.3(mA/V) Valve 2 Ia1 = 0.78(mA), gm1 = 1.3(mA/V) Ia2 = 0.8(mA), gm2 = 1.35(mA/V) NOS specification: Ia = 1.2(mA), gm = 1.6(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. 20230522L004

Pair Of Mullard M8137 CV4004 KB/D. Condition of these items looks to be good. I am unable to test so they are sold as seen. For exact international shipping costs please contact me.

Mullard M8137 ECC83 CV4004 Box plates Halo getter Tested on AVO CT160 Ia: 1.9 & 1.9Gm: 1.9 & 2.1 The cardboard box has been repurposed. Shipping Please contact me for a postage quotation to your country before paying. Any questions, please ask. No shipping to Russia. Before paying please wait for an invoice or ask for a postage quotation.

I have 4 super rare very strong tv7 tested Mullard box plate M8137 / CV4004 / 12AX7 tubes

RARE MULLARD M8137 CV4004 6057 ECC83 BOX PLATE , SQUARE GETTER 641 R6K FROM OCTOBER 1956 THE PRINT HAS WORN OFF BUT OTHERWISE IN BEAUTIFUL CONDITION AND FLUL WORKING ORDER ??AVO VCM163 TESTED READINGS TUBE 1 - Ia 1.15/1.3 gm 1.7/1.7 100% = Ia 1.2 gm 1.6 PLEASE MAKE PAYMENT IMMEDIATELY AS I WILL BE GOING ON HOLIDAY SHORTLY AFTERIF PAYMENT IS NOT RECEIVED IN TIME I WILL NOT BE ABLE TO SHIP UNTIL THE 15TH AUGUST - BY BIDDING ON THIS AUCTION YOU ACCEPT THESE CONDITIONS ? PLEASE SEE MY OTHER AUCTIONS ?

RARE STRONG MULLARD M8137 CV4004 ECC83 NOS UNBOXED WITH CODE 641 R3C4 FROM MARCH 1973 IN SUPERB CONDITION AND PERFECT WORKING ORDER - TESTED STRONG ??AVO VCM163 TESTED READINGS TUBE 1 - Ia 1.5/1.5 gm 1.7/1.7 100% = Ia 1.2 gm 1.6 ?

I have 4 super rare very strong tv7 tested Mullard box plate M8137 / CV4004 / 12AX7 tubes

MULLARD VALVE M8137 CV4004 white print made in Great Britain date / factory codes-- looks like 641R1G1

MULLARD Valve M8137 CV4004 boxed new old stock made in Great Britain KB/D date and factory codes are not very clear looks like -- 64.1 R3D2

RARE LOT OF 4 MULLARD CV4004 ELECTRON TUBES PLEASE SEE PHOTOS FOR DETAILS We don’t know much about these so if you have questions please ask before making offers Out of a Vintage High end Audio collection we will be listing many different stereo and amplifier tubes, these have been in climate controlled storage for many years. ALL ARE UNTESTED Units/ tubes are untested and sold in As-Is condition, Buyers are responsible for reviewing the entire listing description prior to committing to purchase, Images and videos (if provided) are of the actual item for sale and is to be considered as part of the description so please review them carefully, if you would like additional images please request prior to bidding, Majority of the items offered for sale are vintage and pre-owned unless otherwise stated, in which will exhibit typical signs of wear and or normal use. Any defects will be notated in the description but please keep in mind I’m am not an expert, I always try my best to list any defect I see but I may miss things from time to time so please feel free to ask questions and I’ll respond to the best of my ability… These items were purchased in a huge lot of vintage Radio and testing equipment, please see other listings as well… OUR LOT #99

RARE STRONG MATCHED PAIR OF MULLARD M8137 CV4004 ECC83 PRINT WORN BUT CODES VISIBLE DATED TO 1965 AND 1967 IN GOOD CONDITION AND PERFECT WORKING ORDER - TESTED STRONG ??AVO VCM163 TESTED READINGS TUBE 1 - Ia 1.4/1.3 gm 1.6/1.7 TUBE 2 - Ia 1.9/1.7 gm 1.8/1.7 100% = Ia 1.2 gm 1.6 ? PLEASE SEE MY OTHER AUCTIONS ?

Mullard M8137 CV4004 KB/D. Condition of this item looks good. I am unable to test, so it’s sold as seen. For exact international postage rates, please contact me.

WELCOME TO YET ANOTHER GREAT DR-TRON AUCTION. THIS SALE IS FOR A VINTAGE VALVE TUBE..... Mullard M8137, CV4004, ECC83 / 12AX7CV4004 KB/D. WHITE PRINT.HALO GETTER. Box Anode plates. MADE IN Great Britain. Code = 641-R8G4.TESTS 100%..A1 = 1.90mA. A2 = 1.75mA..... 100% = 1.2mA.FROM WORKING EQUIPMENT. Please note...... ALL MY TUBES ARE TESTED ON MY CALIBRATED ...... AVO VCM-163 TUBE TESTER .... BEAR IN MIND ALL TUBE TESTERS GIVE SLIGHTLY DIFFERENT READINGS..... MY READINGS ARE ACCURATE AND HONEST. I WILL SHIP THIS ITEM WORLDWIDE. PLEASE LOOK AT MY OTHER VINTAGE PARTS AUCTIONS. THANK YOU FOR TAKING TIME TO VIEW MY ITEM, AND GOOD LUCK !!!

2x Mullard ECC83 Valves Date Code: I61 B2H2, I61 B2H2 Tested by AVO VCM Tester Valve 1 Ia1 = 0.85(mA), gm1 = 1.3(mA/V) Ia2 = 1.05(mA), gm2 = 1.4(mA/V) Valve 2 Ia1 = 1.02(mA), gm1 = 1.45(mA/V) Ia2 = 0.8(mA), gm2 = 1.3(mA/V) NOS specification: Ia = 1.2(mA), gm = 1.6(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. 20230522L017

2x Mullard 12AX7S/CV4004 Valves This pair of 12AX7S/CV4004 are with very unique box-anode construction. They are believed manufactured by Mullard Mitcham factory Tested by AVO VCM Tester Valve 1 Ia1 = 0.7(mA), gm1 = 1.25(mA/V) Ia2 = 0.8(mA), gm2 = 1.3(mA/V) Valve 2 Ia1 = 0.78(mA), gm1 = 1.3(mA/V) Ia2 = 0.8(mA), gm2 = 1.35(mA/V) NOS specification: Ia = 1.2(mA), gm = 1.6(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. 20230522L004

2x Mullard ECC83 Valves Very rare pair of Mullard ECC83 manufactured in 1955 with long-plate and []-getter Date Code: mC1 B5F, mC1 B5F Tested by AVO VCM Tester Valve 1 Ia1 = 1.32(mA), gm1 = 1.55(mA/V) Ia2 = 1.45(mA), gm2 = 1.4(mA/V) Valve 2 Ia1 = 1.23(mA), gm1 = 1.5(mA/V) Ia2 = 1.48(mA), gm2 = 1.45(mA/V) NOS specification: Ia = 1.2(mA), gm = 1.6(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. 20230522L001

2x Mullard ECC83 Valves Date Code: I61 B3B4, I61 **** Yellow pirnt, copper-grid-support, and halo-getter Tested by AVO VCM Tester Valve 1 Ia1 = 0.85(mA), gm1 = 1.5(mA/V) Ia2 = 2(mA), gm2 = 1.8(mA/V) Valve 2 Ia1 = 1.55(mA), gm1 = 1.7(mA/V) Ia2 = 1.3(mA), gm2 = 1.5(mA/V) NOS specification: Ia = 1.2(mA), gm = 1.6(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. 20221122L016

For your consideration are two Mullard M8137 cv4004 with matching date codes. These are the military versions of Mullards 12AX7/ECC83 These tubes were tested in a Hickok 539C where the minimum reading is 875gm and the reading for a new tube is 1375gm. The tubes tested at 1600gm/1500GM & 1600gm/1600gm

1x Mullard CV492 Valve Very rare Mullard CV492/ECC83 with long plate and []-getter, new in original box Date Code: mC1 B6H (1956) Tested by AVO VCM Tester Ia1 = 1.58(mA), gm1 = 1.9(mA/V) Ia2 = 1.43(mA), gm2 = 1.7(mA/V) NOS specification: Ia = 1.2(mA), gm = 1.6(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. 20230522L020

1x Mullard CV4035 Valve Date Code: AG0 R7G(1957) NOS, soldered to a B9A pinout and can directly replace any CV4004/M8137/CV491/ECC83/12AX7 valve Tested by AVO VCM Tester Ia1 = 1.25(mA), gm1 = 1.7(mA/V) Ia2 = 1.45(mA), gm2 = 1.8(mA/V) NOS specification: Ia = (mA), gm = (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. 20221122L014

1x Mullard CV492 Valve Very rare Mullard CV492/ECC83 with long plate and []-getter, new in original box Date Code: mC1 B6H (1956) Tested by AVO VCM Tester Ia1 = 1.58(mA), gm1 = 1.9(mA/V) Ia2 = 1.43(mA), gm2 = 1.7(mA/V) NOS specification: Ia = 1.2(mA), gm = 1.6(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. 20230522L020