Amperex 6267 (EF86) 5-pin vacuum tube for low-noise amplification. Tested for audio performance and transconductance. It works properly. Does not apply. We will send a product by SpeedPAK, DHL or EMS.
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1950s MULLARD PRODUCTION. B9C DATE CODES. 2 X EF86 TUBE. TESTED IN AMPLITREX AT1000 TUBE TESTER.
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Balanced Pair EF86 D-Getter TESLA Military tubes 1976'y. NOS. 100% = 2,2 mA!
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As Per Photo. Print is Poor. Supplied in Plain White Box.
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Working valve
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Mullard solid screen EF86 valves, Matching Blackburn Codes Tested Code B4E1 1964 Tested BK600 = 91 New test 89 up No gas shorts grid emissions
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The EF86 is a high gain pentode designed to amplify low-level audio signals. NOS / NIB Tubes. Strong NOS & balancec test results. All our tubes are tested for shorts and gas leak. Result: Ia = 6 & 6 mA (3 = 100 %).
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