Premium West German Telefunken EL84 with genuine diamond ◇ etched into stem bottom. Tested excellent across emission, vacuum, and transconductance. Gray smooth plates, ready for high-fidelity audio.
Tested excellent on Tesla BM-215A curve tracer - emission, vacuum, and transconductance all well above nominal specifications. Ready for immediate installation in demanding audio applications.
Direct equivalents: 6P15 = CV2975 = N709 = 6BQ5
Similar, normally replaceable with slight differences: EL84-T ~ EL84-TII ~ 6BQ5B ~ 7189 ~ EL84F
Note: 6BQ5 is the North American RETMA designation for the EL84; electrically and mechanically interchangeable
Introduced by Philips in February 1953 and immediately adopted by Telefunken as a West German standard, the EL84 evolved as the final refinement of the EL3 design family through the EL41 predecessor. The Telefunken EL84, distinguished by the genuine diamond ◇ (Rautenboden) etched into the stem bottom, is the hallmark of West German manufacturing excellence and remains the gold standard for audio purists and amplifier builders worldwide. Its 12W dissipation and gray smooth plate construction deliver the smooth harmonic character that made the EL84 the tube of choice for iconic amplifiers from the 1950s onward. The EL84 powered everything from modest European radios to the legendary Watkins Dominator guitar amplifier and continues to define the tone of tube audio systems today. Telefunken examples remain among the most sought-after EL84 variants for their consistent tonal warmth and reliability.
Authentic Telefunken diamond ◇ bottom EL84 - tested excellent across all parameters. The gold standard for high-fidelity audio.
SKU: 344