Mullard EL84 Matched Pair,kM1 B004 declined getter ring. Late 60's production rare and wonderful tubes. Both tested at 105 good for emissions and leakage on my Sencore TC109 tester with no shorts. $49 shipped complete. From BRENT JESSEE RECORDING & SUPPLY, INC. Mullard EL84 tubes were made in both the old "shield" logo in white ink, and later the IEC/Mullard logo in white. They are rarer than Amperex, but worth seeking out. They are powerful, yet creamy, with a nice deep richness and warmth in the lower mids and bass. Mullard made these for GE, Raytheon, Admiral, and many other USA brands. They can be spotted by the seams on the top of the glass, "Great Britain" in white at the top or bottom, and the "B" code for the Blackburn factory at the bottom. Like the Amperex tubes, Mullard tubes are burned in at the factory, so even new ones have small "sooty" looking spots near openings in the plate. Just a few hours of use will make Mullard tubes get large sooty patches inside the glass. This in no way affects the life or sound of the tube. Many found today were "aged" at the factory or by hi-fi shops, and the sooty marks inside the glass is actually a sign of authenticity, as the fakes will not develop the dark marks.
|
