TUBEOFILE
EL5G — Power Pentode, Octal | Tubeofile
← Browse Philips Australia Medium quality — at least 60% of universal parameters and pins are present, but some key data is missing. Verify specific values against datasheets before critical use.
Known Equivalents & Substitutes
No known equivalents. If you know of any, use the ⚑ Report Issue button above.
Similar Tubes (Not Drop-In Compatible)
4 V heater version with P8A base — different heater and base Mullard Octal-base equivalent of EL5 — may have identical pinout Electrically identical but P8A side-contact base — different base, not pin-compatible Electrical Specifications
Absolute Maximum
Anode Voltage (max) Anode Voltage (max) 275V
Screen Voltage (max) Screen Voltage (max) 275V
Anode Dissipation (max) Anode Dissipation (max) 18W
Typical Operating
Anode Voltage (typical) Anode Voltage 250V
Notes
The 'G' suffix indicates glass envelope with Octal (K8A/IO) base — a different base from the standard P8A side-contact EL5. Valve equivalents reference lists this as a pentode with I/O (International Octal) base and 6.3 V heater. Anode connection via top cap for high-voltage isolation. Very rare Australian wartime variant — classified as rare circa 1925-1945 era. Pin Layout — Octal
1 2 3 4 5 6 7 8
1 No Connection
2 Heater
3 Screen Grid
4
Socket-Compatible Tubes ⚠ Not electrically compatible
Screen Voltage (typical) Screen Voltage
275V
Grid 1 Bias Voltage Grid 1 Bias Voltage -7.5V
Anode Current Anode Current 58mA
Anode Resistance Anode Resistance 25,000Ω
Transconductance Transconductance 8.5mA/V
Output
Output Power Output Power (Class A SE, 5% THD) 8.8W
Heater
Heater Voltage Heater Voltage 6.3V
Heater Current Heater Current 1.35A
Absolute Maximum
Anode Voltage (max) Anode Voltage (max) 275V
Screen Voltage (max) Screen Voltage (max) 275V
Anode Dissipation (max) Anode Dissipation (max) 18W
Typical Operating
Anode Voltage (typical) Anode Voltage (typical) 250V
Screen Voltage (typical) Screen Voltage (typical) 275V
Grid 1 Bias Voltage Grid 1 Bias Voltage -7.5V
Anode Current Anode Current 58mA
Transconductance Transconductance
Output
Output Power Output Power (Class A SE, 5% THD) 8.8W
Control Grid
6 Suppressor Grid (internally connected to cathode)
TC Top Cap — Anode (top cap)
8.5mA/V