They are top of EF86 with clarity, deadly quiet, rich bass smooth and natural mid voice. The tube is carefully tested on my TV-7/U at the NOS range, tightly balanced. What you see is what you get. They are rather rare and hard to find.
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High frequency pentode. The steepness of the characteristic. 1.8 ± 0.5 mA / V. Grid current second. not more than 1 mA. Anode current. Cathode limiting current. The power dissipated by the grid is the second, the limiting.
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1960s TOSHIBA PRODUCTION. 2 X EF86 TUBE. 120% EMISSION (EM) 119% TRANSCONDUCTANCE (GM) 0.0mA GAS.
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1 X EC86 TUBE. 1960s PRODUCTION. TESTED IN FUNKE W20 TUBE TESTER MINIMUM GOOD EMISSION = 60% = 7mA.
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EF86 Valve Tube. Mullard, British Made. Fully Tested on AVO VCM 163.
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Mullard EF86. Fully Tested on the Amplitrex AT1000 Tester. IA: 86% GM: 94%. Test results This Valve.
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(FOR SALE: 2 X EF86 TUBE. TESLA PRODUCTION. com, etc). MATCHED PAIR. TESTED IN AMPLITREX AT1000 TUBE TESTER. They do not take this into account.
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Tubes test NOS. Tv7 tested TUBES. All our tubes have been tested for. It can be wiped off and destroyed VERY easily. special checking. This test needs sound amplification; hearing listening to noise with headphones would indicate a real disaster inside a tube (THE shorts test WOULD already BE evidence OF THIS).
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