47 / 247

Valve 47 or 247 (this mainly in the USA versions or for that market) is an excellent output power pentode for AUDIO amplification designed mainly for radio circuits. The 47 was also used in some particular military devices. Its characteristics and filament turn-on voltage allow it to be considered an excellent audio valve, today rediscovered in the HI-FI field.

EQUIVALENCE: 47 = 247 = PZ = UY-47_Japan = UY-247_Japan = A247 = VT-47 = PH247 = CV1772 = VT47_USA = F247 = Z-47 = 38047 = G-47 = 247S = EY647 = NY-247 = 447 = UY247B = UY247 = UY-247 = ER247 = KR47 = Y-247 = PPX2470 = CL-47 = T-47 = RX247 = C-47 = PA247 = RYB247 = NU-47 = UY647 = TS247 = P247 = C347 = 47B ; 47E = 47M = FX247 = KR48 = PZ147 = RES347 = SY247 = TU247

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