MULLARD EZ81 / 6CA4 – MATCHED PAIR (2 PCS)
Long Black Plate
Top Ring Getter
Made in UK
Full-Wave Rectifier EZ81 / 6CA4
New in White Box
Amplitrex AT1000 Tested
Up for sale is a matched pair (2 pcs) of premium vintage NOS Mullard EZ81 / 6CA4 full-wave rectifier vacuum tubes, manufactured in the UK and supplied in individual white boxes. Revered by tone enthusiasts and audiophiles for their exceptional reliability, sag-free power delivery, and lush musical warmth, these British-made rectifiers feature classic long black plates and top ring getter construction. A premier choice for upgrading power supplies in vintage hi-fi amplifiers, custom OTL/valve gear, and guitar amplifiers requiring EZ81 / 6CA4 series tubes.
Both tubes have been thoroughly emission and leakage tested on a precision Amplitrex AT1000 tube tester. Measured Forward Current (FWD in uA) and Reverse Leakage Current (REV in uA) for each diode section (Anode A & Anode B) are detailed in the table below.
| Serial No. | Diode Anode Section | Forward Current (FWD) | Reverse Leakage (REV) | Status |
|---|---|---|---|---|
| SR.NO.4339002 | Anode A | 974 uA | 0.0 uA | PASS / NOS |
| Anode B | 975 uA | 0.0 uA | PASS / NOS | |
| SR.NO.4339004 | Anode A | 973 uA | 0.0 uA | PASS / NOS |
| Anode B | 975 uA | 0.0 uA | PASS / NOS |
Technical Note: Custom duties and taxes are the responsibility of the buyer in their country.
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