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Mullard ECC82 Long Plates Square[] Getter Matched Pair - Blackburn '58 K61 - NOS

Mullard ECC82 Long Plates Square[] Getter Matched Pair - Blackburn '58 K61 - NOS

Regular price $662.48 USD
Regular price Sale price $662.48 USD
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Product Summary

No other tubes can deliver vocals like the Blackburn Mullard's, and that's a fact. These special ECC82 tubes, with the rare goal post square getter and 17mm long plates, carrying the unmistakable vintage sound signature of the very early Blackburn K61 (1st generation of ECC82 long plates) production, are extremely hard to find today and shouldn't be overlooked by critical listeners and tube enthusiasts. 

Sound Characteristics

The overall tonality of Mullard ECC82 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 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 we know where that "warm British jacket" comes from!

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): 2.25/2.06 mA/V  - 102%/94% (100% = 2.20 mA/V)
Measured plate current(IA): 11.102/10.307 mA  - 106%/98% (100% = 10.5 mA)

Tube 2:

Measured transconductance(GM): 2.17/2.13 mA/V  - 99%/97% (100% = 2.20 mA/V)
Measured plate current(IA): 11.342/10.457 mA  - 108%/100% (100% = 10.5 mA)

NO shorts, leakage or gas. NO noise or microphonics.

Curve trace is also included in the original RoeTest report.

Appearance & cosmetic condition

This tube is in pristine cosmetic condition with nearly 100% of the paint and lettering well retained. The Blackburn date code etched on glass is also perfectly: 

K61 B8A (K61 = ECC82 long plates production gen #1, B = Blackburn, 8 = 1958, A = January)
K61 B8I (K61 = ECC82 long plates production gen #1, B = Blackburn, 8 = 1958, I = September)


This pair of tubes will be packaged in the NEW Mullard reproduction tube boxes.
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