EF54

Name: EF54
Brand: Mullard

Small Signal Pentode — Loctal — Mullard

Data: HighHigh quality — base, heater, all universal parameters present, and ≥50% of desirable parameters filled in. Safe to use for design decisions.

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Known Equivalents & Substitutes

VR136CV380CV1136

Electrical Specifications

Absolute Maximum

Anode Voltage (max)Anode Voltage (max)300V

Screen Voltage (max)Screen Voltage (max)250V

Anode Dissipation (max)Anode Dissipation (max)2.5W

Typical Operating

Anode Voltage (typical)Anode Voltage (typical)250V

Notes

Military designation VR136 (UK). Designed for VHF amplifier service.
Loctal (B9G) base provides superior high-frequency performance over Octal types.
Widely used in WWII radar intermediate-frequency amplifier strips.

Pin Layout — Loctal

1Suppressor Grid (g3)

2Heater

3Anode (Plate)

Socket-Compatible Tubes ⚠ Not electrically compatible

7B4 7C5 EL61

References