TUBEOFILE
EL44 — Power Pentode, Rimlock | Tubeofile | Tubeofile
← Browse 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)
Same Rimlock B8A base but without top cap — different anode connection method, different ratings Noval successor to the Rimlock EL4x family — different base, improved design Electrical Specifications
Absolute Maximum
Anode Dissipation (max) Anode Dissipation (max) 12W
Typical Operating
Screen Voltage (typical) Screen Voltage 80V
Anode Current Anode Current 2mA
Anode Resistance Internal Plate Resistance 100,000Ω
Notes
Rimlock B8A base with top-cap anode connection — unusual combination for Rimlock tubes. Heater current of 0.72 A is identical to the EL84, suggesting this was a transitional design between the Rimlock and Noval eras. Very rare tube — found in very few radio models. The Rimlock-with-top-cap configuration was quickly superseded by the fully-pinned Noval designs. Referenced in RTT (Radio Technique Telefunken) 2nd edition, 1950. Pin Layout — Rimlock
1 2 3 4 5 6 7 8
1 Screen Grid (g2)
2 Heater
3 Cathode
4
Transconductance Transconductance
2.5mA/V
Heater
Heater Voltage Heater Voltage 6.3V
Heater Current Heater Current 0.72A
Suppressor Grid (g3)
TC Top Cap — Anode (top cap)