2x Mullard ECC83 Valves Date Code: ◿8K (1958), ◿8J (1958) Manufactured by PHILIPS in their Heerlen factory in HOLLAND. Tested by AVO VCM Tester Valve 1 Ia1 = 1.05(mA), gm1 = 1.6(mA/V) Ia2 = 1(mA), gm2 = 1.55(mA/V) Valve 2 Ia1 = 1.15(mA), gm1 = 1.6(mA/V) Ia2 = 1.1(mA), gm2 = 1.55(mA/V) NOS specification: Ia = 1.2(mA), gm = 1.6(mA/V) *** This valve has also been tested in amplifier without any noise. *** Postage Costs I am happy to post this item to worldwide and combine postage cost on multiple purchases. 20251023L045
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