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A well-known manufacturer from the former East Germany. RFT tubes are generally respected for their durability and warm sound characteristics.
A full-wave rectifier tube commonly used in valve amplifiers (especially guitar amps and hi-fi gear). It converts AC into DC to power the circuit.
Common uses
Vintage-style guitar amplifiers (e.g., Vox AC15-type circuits)
Hi-fi tube amplifiers
DIY valve amp builds
Why do people like RFT EZ81
Smooth voltage sag (nice compression feel in amps)
Reliable compared to some modern production tubes
Often more affordable than premium NOS brands like Mullard
Heater: 6.3V
Max DC output current: ~150 mA
Indirectly heated cathode (gentler on components than some older rectifiers)
Equivalent to: 6CA4 (American designation)
