Mullard
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$268.50 USD
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$268.50 USD
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Tube Selection
Original Shield Logo "BVA"Variant sold out or unavailable
Philips Miniwatt LabeledVariant sold out or unavailable
Tubes
Early 1960s I61 Copper RodsVariant sold out or unavailable
Late 1960s I62Variant sold out or unavailable
1961 Matched PairVariant sold out or unavailable
1964 PairVariant sold out or unavailable
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No other tubes can deliver vocals like the Blackburn Mullard's, and that's a fact. These ECC83's are extremely hard to find today and are becoming every serious audiophile's darling. Presented here are two lovely Blackburn valves with the old-style Mullard shield logo, which are even more special today.
The overall tonality of Mullard ECC83 tubes is warm and lively with a very spacious sound stage. "Like a warm British jacket of the finest tweed, these glorious tubes have an attractive sweet warmth in their midrange and lower regions." This is how the experts on audiotubes.com describe the sound signature of British-made Mullard tubes. The top end is silky and pleasant and doesn't get rolled off. They retain a fine sense of "air" at the top, and the upper midrange is smooth and liquid. These tubes reproduce the human voice, especially female voices, with haunting realism. The British made Mullard tubes are also known to have an attractive sparkle at the top with rich bass...now we know where that "warm British jacket" comes from!
Packaging
NEW reproduction Mullard tube boxes.
Original Shield Logo "BVA" - Early 1960s I61 Copper Rods
Mullard ECC83 12AX7 Short Plates Copper Rods Matched Pair -BVA-Blackburn '60/'61
$268.50
Professional Tube Testing
This set was tested and certified by RoeTest V11 Professional Tube Testing System with the following result:
Tube 1:
Measured transconductance(GM): 1.54/1.5 mA/V - 96%/94% (100% = 1.6 mA/V)
Measured plate current(IA): 1.09/1.097 mA - 91%/91% (100% = 1.2 mA)
Tube 2:
Measured transconductance(GM): 1.43/1.55 mA/V - 89%/97% (100% = 1.6 mA/V)
Measured plate current(IA): 0.977/1.067 mA - 81%/89% (100% = 1.2 mA)
NO shorts, leakage or gas. NO noise or microphonics.
Curve trace is also included in the original RoeTest report.
Appearance & Cosmetic condition
Silkscreen: 98% - 100% (Immaculate)
Date codes:
I61 B0J ( B = Blackburn, GB, 0 = 1960 , J = October)
I61 B1B ( B = Blackburn, GB, 1 = 1961 , B = February)
Original Shield Logo "BVA" - Late 1960s I62
Mullard ECC83 12AX7 Short Plates Matched Pair - BVA - Blackburn '67 I62 – NOS
$249.60
Professional Tube Testing
Tube 1:
Measured transconductance(GM): 1.65/1.81 mA/V - 103%/113% (100% = 1.60 mA/V)
Measured plate current(IA): 1.24/1.562 mA - 103%/130% (100% = 1.2 mA)
Tube 2:
Measured transconductance(GM): 1.48/1.73 mA/V - 92%/108% (100% = 1.60 mA/V)
Measured plate current(IA): 1.03/1.36 mA - 86%/113% (100% = 1.2 mA)
Curve trace is also included in the original RoeTest report.
Appearance & Cosmetic condition
Silkscreen: 98% - 100% (Immaculate)
Date codes:
I62 B7I2 (B = Blackburn, GB, 7 = 1967 , I = September, 2 = Week #2 of the production month)
I62 B7J2 (B = Blackburn, GB, 7 = 1967 , J = October, 2 = Week #2 of the production month)
Philips Miniwatt Labeled - 1961 Matched Pair
2x Mullard ECC83 12AX7 Short Plates - Blackburn '61 - Philips Label - Near NOS
$253.25
Professional Tube Testing
This set was tested and certified by RoeTest V11 Professional Tube Testing System with the following result:
Tube 1:
Measured transconductance(GM): 1.48/1.55 mA/V - 92%/97% (100% = 1.60 mA/V)
Measured plate current(IA): 1.052/1.172 mA - 88%/98% (100% = 1.2 mA)
Tube 2:
Measured transconductance(GM): 1.62/1.39 mA/V - 101%/87% (100% = 1.60 mA/V)
Measured plate current(IA): 1.112/0.985 mA - 93%/82% (100% = 1.2 mA)
NO shorts, leakage or gas. NO noise or microphonics.
Curve trace is also included in the original RoeTest report.
Appearance & Cosmetic condition
Silkscreen: 98% - 100% (Immaculate)
Date codes:
I61 B1C (B = Blackburn, GB, 1 = 1961 , C = March)
I61 B1C (B = Blackburn, GB, 1 = 1961 , C = March)
Philips Miniwatt Labeled - 1964 Pair
2x Mullard ECC83 12AX7 Short Plates Philips Label - Blackburn '64 I63 - Near NOS
$247.45
Professional Tube Testing
This set was tested and certified by RoeTest V11 Professional Tube Testing System with the following result:
Tube 1:
Measured transconductance(GM): 1.45/1.48 mA/V - 91%/93% (100% = 1.6 mA/V)
Measured plate current(IA): 1.517/1.172 mA - 126%/98% (100% = 1.2 mA)
Tube 2:
Measured transconductance(GM): 1.66/1.85 mA/V - 104%/116% (100% = 1.6 mA/V)
Measured plate current(IA): 1.307/1.397 mA - 109%/116% (100% = 1.2 mA)
NO shorts, leakage or gas. NO noise or microphonics.
Curve trace is also included in the original RoeTest report.
Appearance & Cosmetic condition
Silkscreen: 98% - 100% (Immaculate)
Date codes:
I63 B4C1 (B = Blackburn, GB, 4 = 1964 , C = March, 1 = Week 1 of the production month)
I63 B4H1 B = Blackburn, GB, 4 = 1964 , H = August, 1 = Week 1 of the production month)
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