TUBEOFILE
EL3/375 — Power Pentode, P8A | Tubeofile
← Browse Philips 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
Similar Tubes (Not Drop-In Compatible)
Original version with higher heater current (1.2 A vs 0.9 A) EL3/425
Higher voltage-selected variant rated to 425 V Standard version rated to 250 V — electrically near-identical, but lower max voltage rating Electrical Specifications
Absolute Maximum
Anode Voltage (max) Anode Voltage (max) 375V
Screen Voltage (max) Screen Voltage (max) 275V
Anode Dissipation (max) Anode Dissipation (max) 9W
Typical Operating
Anode Voltage (typical) Anode Voltage 250V
Notes
EL3/375 and 4694 are identical — different naming conventions for the same tube. Cathode-bias only — fixed bias is prohibited per the datasheet. Factory-selected for Va_max = 375 V; standard EL3N is rated to 250 V. Anode connection via top cap. Brans lists equivalents: 4654(P), 4654K, 4689(P), EL12/325, EL12spez, EL35, EL50. Pin Layout — P8A
1 2 3 4 5 6 7 8
1 Control Grid
2 Cathode
3 Heater
4
Socket-Compatible Tubes ⚠ Not electrically compatible
Screen Voltage (typical) Screen Voltage
250V
Grid 1 Bias Voltage Grid 1 Bias Voltage -6V
Anode Current Anode Current 36mA
Screen Current Screen Current 4mA
Anode Resistance Anode Resistance 50,000Ω
Transconductance Transconductance 9mA/V
Output
Output Power Output Power (Class A SE) 4.5W
Heater
Heater Voltage Heater Voltage 6.3V
Heater Current Heater Current 0.9A
Absolute Maximum
Anode Voltage (max) Anode Voltage (max) 375V
Screen Voltage (max) Screen Voltage (max) 275V
Anode Dissipation (max) Anode Dissipation (max) 9W
Typical Operating
Anode Voltage (typical) Anode Voltage (typical) 250V
Screen Voltage (typical) Screen Voltage (typical) 250V
Grid 1 Bias Voltage Grid 1 Bias Voltage -6V
Anode Current Anode Current 36mA
Anode Resistance Anode Resistance
Output
Output Power Output Power (Class A SE) 4.5W
Heater
6 Metallization (external shield)
7 Suppressor Grid (internally connected to cathode)
TC Top Cap — Anode (top cap)
50,000Ω
Transconductance Transconductance 9mA/V