Mullard CV5358 6DJ8 ECC88 Military Preamp Tube Blackburn 1965 Strong NOS

Perfect balanced vintage Mullard CV5358 (Military version of ECC88) audio tube - Made in Gt. Britain - 1965 - Extremely Rare. Note: If your system requires a pair of tubes to work, please check out our listing of Matched Pair of Mullard CV5358/6DJ8 Tubes - Blackburn 1965. Technically equivalent to 6DJ8/ECC88, the British military Mullard CV5358 tubes are the BEST choice if you want to hear even more refined version of the legendary Blackburn 6DJ8 sound. No other tubes can deliver vocals like the Blackburn Mullard tubes, from ECC88 to E88CC to E188CC every variant of these can make your audio system sing like an angel, and that's a fact. These ECC88's are extremely hard to find today and are becoming the darling of every serious audiophile. The overall tonality of Mullard ECC88 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. 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!

We treasure this pair also because of the pristine cosmetic condition - 100% of the paint is intact and the identical Blackburn factory date code is perfectly visible on both tubes. B5G2 (B = Blackburn, 5 = 1965, G = September, 2 = 2nd week of the month). The tube tested Strong NOS (110%+ GM) on a Mercury 2000 tube tester with the following result mutual conductance in.

Good tubes start at 7000 and new tubes incl. NOS/NIB 12,500 - 13,000, and the Mercury 2000's rated mutual conductance (nominal) for new tubes is 12,500. Test result can also be seen in the pictures. In case you wonder what all these numbers mean to your sound experience, it's actually quite straightforward: mutual conductance directly translates to a tube's ability to amplify sound , so the higher the numbers the stronger. The original military box (no Mullard logo - used for internal distribution) will be included for this tube.

Soundlumia does not encourage or participate in such practice. Nor will we respond to any messages inquiring about this topic. Soundlumia sets extremely high quality standard for the products we deliver. Sound experience is a very subjective thing, and let's be real it's not that easy to run into compatibility issues between amps and tubes so that one won't fly, either.

Secondly, if you are a tube roller looking to game the return system, Number One STOP. We have seen it all and we know what you're up to.