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1x NOS Mullard CV4035 Valve Tube 1957 Flying Lead CV4004 M8137 CV492 ECC83 12AX7

End: 09.06. 2023 15:35:56 on Friday
  • Condition: Used
  • Price: 138.87 EUR FESTPREIS
  • Status: sold
  • Item number: 295742203831
  • Seller: c77 (503|100.0%)
  • Seller information: non commercial
  • Item location: Hull Großbritannien
  • Ships to: Worldwide
  • Shipping: 13,97 EUR
  • on EBAY
  • Description

    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 Tube NOS mC1 1956 Eq ECC83 CV4004 B339 12AX7 M8137

End: 05.06. 2023 22:31:29 on Monday
  • Condition: New: Other
  • Price: 349.53 EUR FESTPREIS
  • Status: unsold
  • Item number: 295714063834
  • Seller: c77 (500|100.0%)
  • Seller information: non commercial
  • Item location: Hull Großbritannien
  • Ships to: Americas
  • Shipping: 13,83 EUR
  • on EBAY
  • Description

    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

2x NOS HIVAC CV491 Valves Tubes 1953 []-getter Eq ECC83 CV4004 B339 12AX7 M8137

End: 05.06. 2023 22:31:29 on Monday
  • Condition: Used
  • Price: 768.19 EUR FESTPREIS
  • Status: unsold
  • Item number: 295714063830
  • Seller: c77 (500|100.0%)
  • Seller information: non commercial
  • Item location: Hull Großbritannien
  • Ships to: Americas
  • Shipping: 16,14 EUR
  • on EBAY
  • Description

    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 Mullard ECC83 Valves Tubes mC1 B5F 1955 Eq 12AX7 CV492 B339 CV4004 M8137

End: 05.06. 2023 22:31:28 on Monday
  • Condition: Used
  • Price: 698.36 EUR FESTPREIS
  • Status: unsold
  • Item number: 295714063828
  • Seller: c77 (500|100.0%)
  • Seller information: non commercial
  • Item location: Hull Großbritannien
  • Ships to: Americas
  • Shipping: 16,14 EUR
  • on EBAY
  • Description

    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 BRIMAR 12AX7 Valves Tubes 1952 []-getter Eq ECC83 CV492 B339 CV4004 M8137

End: 05.06. 2023 22:18:52 on Monday
  • Condition: Used
  • Price: 397.08 EUR FESTPREIS
  • Status: unsold
  • Item number: 295714069852
  • Seller: c77 (500|100.0%)
  • Seller information: non commercial
  • Item location: Hull Großbritannien
  • Ships to: Worldwide
  • Shipping: 13,84 EUR
  • on EBAY
  • Description

    2x BRIMAR 12AX7 Valves Date Code: 4F2 (1952), 3J2(1952) Early version of BRIMAR 12AX7 with long black plate and []-getter Tested by AVO VCM Tester Valve 1 Ia1 = 0.91(mA), gm1 = 1.6(mA/V) Ia2 = 1.15(mA), gm2 = 1.8(mA/V) Valve 2 Ia1 = 0.96(mA), gm1 = 1.65(mA/V) Ia2 = 1.03(mA), gm2 = 1.8(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. 20221122L001

1x VALVO ECC83 Valve Tube mCP DX Eq 12AX7 CV492 B339 CV4004 M8137

End: 05.06. 2023 22:18:52 on Monday
  • Condition: Used
  • Price: 268.61 EUR FESTPREIS
  • Status: unsold
  • Item number: 295714069853
  • Seller: c77 (500|100.0%)
  • Seller information: non commercial
  • Item location: Hull Großbritannien
  • Ships to: Worldwide
  • Shipping: 13,84 EUR
  • on EBAY
  • Description

    1x VALVO ECC83 Valve Date Code: mCP DX Very rare ECC83 munfactured by VALVO (Germany) with long plate and inclined D-getter Tested by AVO Mark VCM tester Ia1 = 1.3(mA), gm1 = 1.6(mA/V) Ia2 = 1.35(mA), gm2 = 1.65(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. 20210507L030

2x Mullard ECC83 Valves Tubes Yellow-print Eq 12AX7 CV492 B339 CV4004 M8137

End: 05.06. 2023 22:18:50 on Monday
  • Condition: Used
  • Price: 105.11 EUR FESTPREIS
  • Status: unsold
  • Item number: 295714069858
  • Seller: c77 (500|100.0%)
  • Seller information: non commercial
  • Item location: Hull Großbritannien
  • Ships to: Worldwide
  • Shipping: 13,84 EUR
  • on EBAY
  • Description

    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

2x Siemens ECC83 Valves Tubes Eq 12AX7 CV492 B339 CV4004 M8137

End: 05.06. 2023 22:18:50 on Monday
  • Condition: Used
  • Price: 245.26 EUR FESTPREIS
  • Status: unsold
  • Item number: 295714069877
  • Seller: c77 (500|100.0%)
  • Seller information: non commercial
  • Item location: Hull Großbritannien
  • Ships to: Americas
  • Shipping: 13,84 EUR
  • on EBAY
  • Description

    2x Siemens ECC83 Valves Date Code: ?W mCP, *** ** Branded Mazda and Mullard but manufactured by Siemens Halske. Tested by AVO VCM Tester Valve 1 Ia1 = 0.95(mA), gm1 = 1.35(mA/V) Ia2 = 1(mA), gm2 = 1.4(mA/V) Valve 2 Ia1 = 0.95(mA), gm1 = 1.35(mA/V) Ia2 = 1.03(mA), gm2 = 1.4(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. 20220412L023

1x NOS Mullard CV4035 Valve Tube 1957 Flying Lead CV4004 M8137 CV492 ECC83 12AX7

End: 05.06. 2023 22:18:50 on Monday
  • Condition: Used
  • Price: 140.15 EUR FESTPREIS
  • Status: unsold
  • Item number: 295714069881
  • Seller: c77 (500|100.0%)
  • Seller information: non commercial
  • Item location: Hull Großbritannien
  • Ships to: Worldwide
  • Shipping: 13,84 EUR
  • on EBAY
  • Description

    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

5x TUNG-SOL ECC83 Valves Tubes 1963 Eq 12AX7 CV492 B339 CV4004 M8137

End: 05.06. 2023 22:16:27 on Monday
  • Condition: Used
  • Price: 233.58 EUR FESTPREIS
  • Status: unsold
  • Item number: 295714069850
  • Seller: c77 (500|100.0%)
  • Seller information: non commercial
  • Item location: Hull Großbritannien
  • Ships to: Worldwide
  • Shipping: 16,14 EUR
  • on EBAY
  • Description

    5x TUNG-SOL ECC83 Valves Manufactured in 1963. Tested by AVO VCM Tester *** 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. 20220412L027

3x MONITOR 12AX7/ECC83 HOLLAND Valves #Tubes Eq CV492 B339 CV4004 M8137

End: 05.06. 2023 22:16:27 on Monday
  • Condition: Used
  • Price: 99.27 EUR FESTPREIS
  • Status: unsold
  • Item number: 295714069856
  • Seller: c77 (500|100.0%)
  • Seller information: non commercial
  • Item location: Hull Großbritannien
  • Ships to: Worldwide
  • Shipping: 13,84 EUR
  • on EBAY
  • Description

    3x MONITOR 12AX7/ECC83 Valves Made in Holland Tested by AVO VCM Tester Valve 1 Ia1 = 0.9(mA), gm1 = 1.4(mA/V) Ia2 = 0.95(mA), gm2 = 1.45(mA/V) Valve 2 Ia1 = 0.98(mA), gm1 = 1.55(mA/V) Ia2 = 0.93(mA), gm2 = 1.5(mA/V) Valve 3 Ia1 = 1.2(mA), gm1 = 1.5(mA/V) Ia2 = 1.38(mA), gm2 = 1.6(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. 20220412L005

1x LORENZ Holland ECC83 Valve Tube Disc-getter Eq 12AX7 CV492 B339 CV4004 M8137

End: 05.06. 2023 22:16:27 on Monday
  • Condition: Used
  • Price: 70.07 EUR FESTPREIS
  • Status: unsold
  • Item number: 295714069867
  • Seller: c77 (500|100.0%)
  • Seller information: non commercial
  • Item location: Hull Großbritannien
  • Ships to: Americas
  • Shipping: 13,84 EUR
  • on EBAY
  • Description

    1x LORENZ/Holland ECC83 Valve Date Code: *** ?1G1 Rare dimple disc version manufactured in Holland, great sounding ECC83. Tested by AVO VCM Tester Ia1 = 1.2(mA), gm1 = 1.75(mA/V) Ia2 = 1.15(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. 20220828L009

4x BRIMAR 12AX7 Valves Tubes Eq ECC83 CV492 B339 CV4004 M8137

End: 31.05. 2023 01:27:41 on Wednesday
  • Condition: Used
  • Price: 186.41 EUR FESTPREIS
  • Status: sold
  • Item number: 295714063844
  • Seller: c77 (500|100.0%)
  • Seller information: non commercial
  • Item location: Hull Großbritannien
  • Ships to: Americas
  • Shipping: 16,14 EUR
  • on EBAY
  • Description

    4x BRIMAR 12AX7 Valves Date Code: 3H52162, 3H52162, 2G6/21**, 2G4/2162 Tested by AVO VCM Tester Valve 1 Ia1 = 1.52(mA), gm1 = 1.75(mA/V) Ia2 = 1.35(mA), gm2 = 1.75(mA/V) Valve 2 Ia1 = 1.55(mA), gm1 = 1.75(mA/V) Ia2 = 1.5(mA), gm2 = 1.7(mA/V) Valve 3 Ia1 = 1.43(mA), gm1 = 1.73(mA/V) Ia2 = 1.23(mA), gm2 = 1.63(mA/V) Valve 4 Ia1 = 1.18(mA), gm1 = 1.45(mA/V) Ia2 = 1.25(mA), gm2 = 1.6(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. 20230522L011

2 X Mullard M8137 CV4004 KB/D

End: 28.05. 2023 13:06:20 on Sunday
  • Condition: Used
  • Price: 162.43 EUR Auktion
  • Status: sold
  • Item number: 325663729557
  • Bids: 29
  • Seller: pfincr (266|100.0%)
  • Seller information: non commercial
  • Item location: Cambridge Großbritannien
  • Ships to: GB
  • Shipping: 20,21 EUR
  • on EBAY
  • Description

    2 X Mullard M8137 CV4004 KB/D. Condition looks good, supplied with original boxes and wrapping. These items are sold as seen and untested.

1x Mullard ECC83 Valve Tube Copenhagen mCA 1953 Eq 12AX7 CV492 B339 CV4004 M8137

End: 24.05. 2023 13:46:29 on Wednesday
  • Condition: Used
  • Price: 326.23 EUR FESTPREIS
  • Status: sold
  • Item number: 295714064518
  • Seller: c77 (500|100.0%)
  • Seller information: non commercial
  • Item location: Hull Großbritannien
  • Ships to: Americas
  • Shipping: 5,5 EUR
  • on EBAY
  • Description

    1x Mullard ECC83 Valve Date Code: ?3 mCA (1953) Very rare ECC83 from Copenhagen factory with long welded plate and D-getter Tested by AVO VCM Tester Ia1 = 1.2(mA), gm1 = 1.45(mA/V) Ia2 = 0.9(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. 20230522L006

 Mullard CV4004 M8137 Special Quality Box Plate Valve Tube Used Tested 

End: 22.05. 2023 11:07:23 on Monday
  • Condition: Used
  • Price: 42.62 EUR Auktion
  • Status: sold
  • Item number: 166113211583
  • Bids: 1
  • Seller: radiovintageman (635|100.0%)
  • Seller information: non commercial
  • Item location: NOTTINGHAM Großbritannien
  • Ships to: GB
  • Shipping: 14,92 EUR
  • on EBAY
  • Description

    Mullard CV4004 M8137 Special Quality Box Plate Valve This type is a special quality robust version of the ECC83 or 12AX7 double triode.Tested on an AVO VCM MkII results are: A1: Ia 1.55mA. Gm 2.2mA/VA2: Ia 1.35mA. Gm 2.1mA/V (Avo spec. for ECC83 is 1.2mA, 1.6mA/V) On 14-May-23 at 18:34:23 BST, seller added the following information: Supplied in white box

MULLARD CV4004 12AX7 ECC83 M8137 BRITISH GOOD QUALITY

End: 21.05. 2023 17:05:01 on Sunday
  • Condition: Used
  • Price: 59.96 EUR Auktion
  • Status: sold
  • Item number: 385613034871
  • Bids: 13
  • Seller: robfredcbradio (202|99.5%)
  • Seller information: non commercial
  • Item location: Beaworthy Großbritannien
  • Ships to: Worldwide
  • Shipping: 15,5 EUR
  • on EBAY
  • Description

    MULLARD CV4004 M8137 12AX7 ECC83 VALVE TUBE GOOD QUALITY BRITISH

2 X Mullard M8137 Valve Tube

End: 21.05. 2023 11:23:21 on Sunday
  • Condition: New: Other
  • Price: 146.43 EUR Auktion
  • Status: sold
  • Item number: 325655175957
  • Bids: 11
  • Seller: pfincr (262|100.0%)
  • Seller information: non commercial
  • Item location: Cambridge Großbritannien
  • Ships to: GB
  • Shipping: 20,18 EUR
  • on EBAY
  • Description

    2 X Mullard M8137 Vacuum tubes. They appear to be new and unused and in original wrapping. These items are sold as seen and untested.

Mullard CV4004 M8137 ECC83 matched pair

End: 18.05. 2023 20:24:10 on Thursday
  • Condition: Used
  • Price: 113.75 EUR Auktion
  • Status: sold
  • Item number: 195773066019
  • Bids: 1
  • Seller: tomv893 (1188|100.0%)
  • Seller information: non commercial
  • Item location: Wilmslow Großbritannien
  • Ships to: GB
  • Shipping: 4,99 EUR
  • on EBAY
  • Description

    A pair of ECC83 M8137 CV4004 12AX7 special quality valves.Both made at the Mitcham factory, etch codes are R9F5 (1959 June week 5) & R4D2 (1964 April, week 2)The M8137 is characterised by a large halo getter used to increase the quality of the vacuum.Tested on an AVO CV160Results are:Valve 1 Anode 1, 1.2mA 1.8gm - Anode 2, 1.2mA 1.8gmValve 2 Anode 1, 1.2mA 2.0gm - Anode 2, 1.2mA 1.9gmBoth valves exceed the standard for ECC83Very stable and quick warming.

 Mullard M8137/CV4004 Special Quality Box Plate Tube. Used. Tested and Matched 

End: 18.05. 2023 12:06:27 on Thursday
  • Condition: Used
  • Price: 34.47 EUR Auktion
  • Status: unsold
  • Item number: 166105188411
  • Bids: 0
  • Seller: radiovintageman (635|100.0%)
  • Seller information: non commercial
  • Item location: NOTTINGHAM Großbritannien
  • Ships to: GB
  • Shipping: 3,45 EUR
  • on EBAY
  • Description

    Mullard CV4004 M8137 Used Special Quality Box Plate Valve This type is a special quality robust version of the ECC83 or 12AX7 double triode.Tested on an AVO VCM the results are perfectly matched: A1: Ia 1.3mA. Gm 2.05mA/VA2: Ia 1.3mA. Gm 2.05mA/V (Avo spec. for ECC83 is 1.2mA, 1.6mA/V) Supplied in brown box

Röhre M8137 CV4004 Tube MULLARD gut geprüft Funke W19 Made BRITAIN

End: 03.10. 2021 19:54:53 on Sunday
  • Condition: Used
  • Price: 64.0 EUR Auktion
  • Status: sold
  • Item number: 203624075353
  • Counter: 95
  • Bids: 11
  • Seller: 2011aufraeumer (3130|100.0%)
  • Seller information: Commercial
  • Item location: Aderstedt Deutschland
  • Ships to: Worldwide
  • Shipping: 16,0 EUR
  • on EBAY

NOS Matched Pair 1968 Mullard M8137/CV4004=12AX7 AVO Tested 100%+

End: 03.10. 2021 05:22:33 on Sunday
  • Condition: New
  • Price: 250.08 EUR Auktion
  • Status: sold
  • Item number: 124920069354
  • Counter: 394
  • Bids: 18
  • Seller: sceglar (311|100.0%)
  • Seller information: non commercial
  • Item location: Woodville West, SA Australien
  • Ships to: Worldwide
  • Shipping: 13,16 EUR
  • on EBAY

NOS Perfect Matched Pair 1963 Mullard M8137/CV4004=12AX7 NIB AVO Test 100%+

End: 03.10. 2021 05:07:10 on Sunday
  • Condition: New
  • Price: 225.07 EUR Auktion
  • Status: sold
  • Item number: 124920055093
  • Counter: 325
  • Bids: 36
  • Seller: sceglar (311|100.0%)
  • Seller information: non commercial
  • Item location: Woodville West, SA Australien
  • Ships to: Worldwide
  • Shipping: 13,16 EUR
  • on EBAY

Tested Mullard CV4004 KB/D (ECC83) (12AX7) (M8137) (CV4004) Valve/Tube (001)

End: 27.09. 2021 16:10:38 on Monday
  • Condition: Used
  • Price: 68.84 EUR Auktion
  • Status: sold
  • Item number: 203607583466
  • Counter: 175
  • Bids: 27
  • Seller: electrondays (84|98.8%)
  • Seller information: non commercial
  • Item location: Plymouth, Devon Großbritannien
  • Ships to: Worldwide
  • Shipping: 3,99 EUR
  • on EBAY