It’s been said that the Mullard sound can be most likened to a warm British jacket of the finest tweed. And I like how Mullard tubes sound, too. Enticingly intimate and warm, almost sweetly so, it’s always a close, handsy dance when listening to a Mullard.
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It’s been said that the Mullard sound can be most likened to a warm British jacket of the finest tweed. And I like how Mullard tubes sound, too. Enticingly intimate and warm, almost sweetly so, it’s always a close, handsy dance when listening to a Mullard.
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However, "B" date code indicates this tube is made by Mullard in England. Short Plate. Very strong with tightly balanced triodes! Made in October 1964 in Blackburn England. Made in England. Tested in my preamplifier to make sure working as intended with no issues at all.
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Mullard Russia 6V6GT x 2 GZ34 x 1 12AX7 x 3 12AT7 x 1 aged. GZ34: Used as a rectifier tube in many high-end audio amplifiers. Mullard is a very famous British vacuum tube manufacturer that is very popular among audiophiles and guitar amplifier enthusiasts for its high quality sound.
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M8137 CV4004 ECC83 12AX7 Mullard. Valve / Tube. Test results This Valve. 15mm Box Ladder Plate. Mottled Glass. IA: 1.2 GM:1.6 ± 20%.
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2x MAZDA ECC83 Valves. NOS specification: Ia = 1.2(mA), gm = 1.6(mA/V). This valve has also been tested in amplifier without any noise. Ia1 = 1.45(mA), gm1 = 1.8(mA/V). Ia2 = 1.55(mA), gm2 = 1.75(mA/V).
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I test all tubes thoroughly and with great care. I test to the best of my ability, and I report all results honestly.
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They feature a 1964 date code of "B4H2" with gray plates and a round getter. Both are test well and above the minimum. Audio Preamp Tubes (12AX7, 12AY7, 6SN7, 6DJ8, etc). It tests for heater-cathode leakage, gas, mutual conductance, and plate current.
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