Brimar
Brimar CV4004 (Mil. spec ECC83) Matched Pair - Gt. Britain '62 KB/AD - Near NOS
Brimar CV4004 (Mil. spec ECC83) Matched Pair - Gt. Britain '62 KB/AD - Near NOS
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Regular price
$376.40 USD
Regular price
Sale price
$376.40 USD
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Soundlumia's Opinion
Made in Gt. Britain, the Brimar ECC83 tubes are very similar to Mullard ECC83's, both in build and in sound characteristics, but they come in at a much more affordable price while delivering almost the same performance as the Mullard tubes.
The overall tonality of British-made Brimar 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 Mitcham 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!
Appearance & cosmetic condition
Over 90% of the paint is intact on this tube although some lettering has worn off. The tube is in great condition.
1F2/3977 (1 = Week 1 of production month, F = June, 2 = 1962, 3977 = Post-1960 ECC83 production)
5C2/3977 (5 = Week 1 of production month, C = March, 2 = 1962, 3977 = Post-1960 ECC83 production)
Professional Tube Testing
Tube 1:
Measured transconductance(GM): 1.51/1.44 mA/V - 94%/90% (100% = 1.60 mA/V)
Measured plate current(IA): 1.105/0.985 mA - 92%/82% (100% = 1.2 mA)
Tube 2:
Measured transconductance(GM): 1.51/1.5 mA/V - 94%/94% (100% = 1.60 mA/V)
Measured plate current(IA): 1.015/0.985 mA - 85%/82% (100% = 1.2 mA)
NO shorts, leakage or gas. NO noise or microphonics.
Curve trace is also included in the original RoeTest report.
Packaging
NEW reproduction white tube boxes.