Two Mullard M8136 CV4003 Box Plate Halo Getter Valves Used Tested - ecc83 excellent test results, see boxes in second picture. great matched pair

FOR SALE IS 3 x 12AU7A TWIN TRIODE VALVES. Also known as ECC82, CV491, M8136, 5814, 5963, 6189, 6067, 6680. The 12AU7A is a medium mu multi-purpose double triode in a 9 pin miniature package. There are numbers on the boxes THEY ALL APPEAR TO HAVE BEEN USED, THEY ALL TESTED AS STRONG VALVES. 10) A1 = 10 mA, gm = 1.7 mA/V. A2 = 10 mA, gm = 1.7mA/V11) A1 = 10 mA, gm = 1.7 mA/V. A2 = 10.2 mA, gm = 1.7 mA/V12) A1 = 10.5 mA, gm = 1.75 mA/V. A2 = 10.5 mA = 1.7 mA/V Note* The only difference between the 12AU7 and the 12AU7A is the A version can be used in series string filament circuits due to its controlled warm-up cathode. Otherwise, there is no difference.

2x SYLVANIA 12AU7 Valves Tested by AVO VCM Tester Valve 1 Ia1 = 11.2(mA), gm1 = 2.4(mA/V) Ia2 = 10.8(mA), gm2 = 2.3(mA/V) Valve 2 Ia1 = 10.5(mA), gm1 = 2.2(mA/V) Ia2 = 11(mA), gm2 = 2.2(mA/V) NOS specification: Ia = 10.5(mA), gm = 2.2(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. 20220828L016

2x RCA 12AU7 Valves With size []-getter. Tested by AVO VCM Tester Valve 1 Ia1 = 9(mA), gm1 = 1.9(mA/V) Ia2 = 10(mA), gm2 = 1.8(mA/V) Valve 2 Ia1 = 8.8(mA), gm1 = 1.7(mA/V) Ia2 = 9.2(mA), gm2 = 1.8(mA/V) NOS specification: Ia = 10.5(mA), gm = 2.2(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. 20220828L011

2x BRIMAR CV491 Valves Very rare BRIMAR CV491/ECC82 with long black plate and []-getter Date Code: 3H2 (1952), 5I2 (1952) Tested by AVO VCM Tester Valve 1 Ia1 = 7.7(mA), gm1 = 1.65(mA/V) Ia2 = 8.5(mA), gm2 = 1.8(mA/V) Valve 2 Ia1 = 7.8(mA), gm1 = 1.6(mA/V) Ia2 = 8.6(mA), gm2 = 1.8(mA/V) NOS specification: Ia = 10.5(mA), gm = 2.2(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. 20230522L022

2x BRIMAR CV491 Valves Date Code: HK (1952), HG (1952) Very rare BRIMAR CV491/ECC82 with long black plate and []-getter Tested by AVO VCM Tester Valve 1 Ia1 = 8.5(mA), gm1 = 1.8(mA/V) Ia2 = 7.7(mA), gm2 = 1.5(mA/V) Valve 2 Ia1 = 7.5(mA), gm1 = 1.65(mA/V) Ia2 = 8(mA), gm2 = 1.75(mA/V) NOS specification: Ia = 10.5(mA), gm = 2.2(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. 20230522L008

2x BRIMAR CV4003 Valves Date Code: 1C4/987(1954), *C4/987(1954) Rare Yellow T version with half-box plate and []-getter Tested by AVO VCM Tester Valve 1 Ia1 = 9(mA), gm1 = 2.1(mA/V) Ia2 = 8..8(mA), gm2 = 2(mA/V) Valve 2 Ia1 = 10.5(mA), gm1 = 2.25(mA/V) Ia2 = 11.2(mA), gm2 = 2.25(mA/V) NOS specification: Ia = 10.5(mA), gm = 2.2(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. 20221122L002

2x HIVAC CV491 Valves Ultra rare NOS Hivac CV491/ECC82 with welded plate and []-getter Date Code: JK (1953), JF (1953) Tested by AVO VCM Tester Valve 1 Ia1 = 12(mA), gm1 = 2.3(mA/V) Ia2 = 14.2(mA), gm2 = 2.4(mA/V) Valve 2 Ia1 = 12.8(mA), gm1 = 2.45(mA/V) Ia2 = 12(mA), gm2 = 2.35(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. 20230522L002

2x BRIMAR CV491 Valves Very rare BRIMAR CV491/ECC82 with long black plate and []-getter Date Code: 3H2 (1952), 5I2 (1952) Tested by AVO VCM Tester Valve 1 Ia1 = 7.7(mA), gm1 = 1.65(mA/V) Ia2 = 8.5(mA), gm2 = 1.8(mA/V) Valve 2 Ia1 = 7.8(mA), gm1 = 1.6(mA/V) Ia2 = 8.6(mA), gm2 = 1.8(mA/V) NOS specification: Ia = 10.5(mA), gm = 2.2(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. 20230522L022

2x BRIMAR CV4003 Valves Date Code: 1C4/987(1954), *C4/987(1954) Rare Yellow T version with half-box plate and []-getter Tested by AVO VCM Tester Valve 1 Ia1 = 9(mA), gm1 = 2.1(mA/V) Ia2 = 8..8(mA), gm2 = 2(mA/V) Valve 2 Ia1 = 10.5(mA), gm1 = 2.25(mA/V) Ia2 = 11.2(mA), gm2 = 2.25(mA/V) NOS specification: Ia = 10.5(mA), gm = 2.2(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. 20221122L002

2x RCA 12AU7 Valves With size []-getter. Tested by AVO VCM Tester Valve 1 Ia1 = 9(mA), gm1 = 1.9(mA/V) Ia2 = 10(mA), gm2 = 1.8(mA/V) Valve 2 Ia1 = 8.8(mA), gm1 = 1.7(mA/V) Ia2 = 9.2(mA), gm2 = 1.8(mA/V) NOS specification: Ia = 10.5(mA), gm = 2.2(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. 20220828L011

2x SYLVANIA 12AU7 Valves Tested by AVO VCM Tester Valve 1 Ia1 = 11.2(mA), gm1 = 2.4(mA/V) Ia2 = 10.8(mA), gm2 = 2.3(mA/V) Valve 2 Ia1 = 10.5(mA), gm1 = 2.2(mA/V) Ia2 = 11(mA), gm2 = 2.2(mA/V) NOS specification: Ia = 10.5(mA), gm = 2.2(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. 20220828L016

2x Mullard ECC82 Valves Date Code: k61 R9H, *** R9F Manufactured in 1959 with Long-plate and O-getter Tested by AVO VCM Tester Valve 1 Ia1 = 11(mA), gm1 = 2(mA/V) Ia2 = 10.5(mA), gm2 = 1.95(mA/V) Valve 2 Ia1 = 14.5(mA), gm1 = 2.15(mA/V) Ia2 = 16(mA), gm2 = 2.3(mA/V) NOS specification: Ia = 10.5(mA), gm = 2.2(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. 20220828L006

Mullard M8136 - CV4003 - ECC82 Matched Pair Valves - New Old Tock - Tested. -Military Valve-Brand new -Square Welded Box Plate (picture 5)-Code 631 R0A2. (pictures 6 and 7)-Mitcham England Factory-Valves tested on Senicore 143 -Both measure 90 in emissions (Pictures 8 and 9) Items are packaged with the greatest of care. All items will be tracked in postage. Sadly we cannot accept returns on this item due to criminals who swap good valves for bad.

This auction is for 2 pcs new, NOS ECC82 6067 M8136 12AU7 Brimar, Made in England.They come in very safe military foam boxes. Tested on my valve characteristic meter AVO Mark 4.Printed on glass on both tubes is 3DO/3987Tube1: Ia1=10,7mA gm1=2,2mA/V Ia2=10,5mA gm2=2,2mA/V Tube2: Ia1=11,5mA gm1=2,5mA/V Ia2=10,7mA gm2=2,4mA /VPay by PayPal or a banktransfer to my account. Registered shipping worldwide is 13 USD. Due to Russian war in Ukrain I will not ship to Russia or BelarusPlease feel free to email me if you have any questions!

2x Mullard ECC82 Valves Very rare Mullard ECC82 with long welded plate and []-getter Date Code: 1593 G3 (1953), **** J3 (1953) Tested by AVO VCM Tester Valve 1 Ia1 = 7(mA), gm1 = 1.35(mA/V) Ia2 = 6.8(mA), gm2 = 1.3(mA/V) Valve 2 Ia1 = 8(mA), gm1 = 1.45(mA/V) Ia2 = 7.5(mA), gm2 = 1.3(mA/V) NOS specification: Ia = 10.5(mA), gm = 2.2(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. 20230522L007

1x Mullard CV491 Valve Very rare Mullard CV491/ECC82 manufactured in 1953 with welded plate and []-getter Date Code: 1593 I3 Tested by AVO VCM Tester Ia1 = 10(mA), gm1 = 1.5(mA/V) Ia2 = 12(mA), gm2 = 1.95(mA/V) NOS specification: Ia = 10.5(mA), gm = 2.2(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. 20230522L019

A pair of closely matched M8136 (ECC82) Mullard double triodesValve 1 Anode 1 9mA 2.1gm - Anode 2 9mA 2.0gmValve 2 Anode 1 9mA 2.2gm - Anode 2 9mA 2.2gmVery stable and quick settling.Both have the same etch code of 631, R8L5.Manufactured at the Mitcham factory.These are the highest quality valves designed for extreme service and very rare.

RARE PAIR MULLARD M8136 CV4003 ECC82 BOX PLATE IN USED CONDITION BUT TESTED GOOD ??AVO VCM163 TESTED READINGS - TUBE 1 - Ia 8.7/8.0 gm 2.0/1.8 TUBE 2 - Ia 7.5/9.5 gm 1.5/1.9 100% = Ia 10.5 gm 2.2 ? PLEASE SEE MY OTHER AUCTIONS ? (SEE PHOTOS FOR FULL DETAILS)

My Ref: (V-0850) Mullard M8136 ECC82 Valve Tested fine on my PAC912 tester Unboxed