Screen dissipation has two separate limits: max 1.4 W at zero signal (idle) and max 3.3 W at maximum output power. The idle operating point must be designed so that Ps ≤ 1.4 W; higher dissipation is only permissible under signal drive.
Vhk_max was 50 V in the 1949 Miniwatt datasheet and raised to 100 V in the 1952 Philips datasheet. The 100 V figure is used here.
The EL41 (Rimlock B8A base) is electrically similar to the EL84 (Noval 9-pin) but pin-incompatible. A base adapter is required for substitution.
Output power is tabulated as 3.9 W at 10% THD in the official Philips datasheet. Brimar and TDSL cite 4.2 W for the same conditions, likely from the peak optimum load point on the output curves rather than the tabulated operating point.
Class AB push-pull (2× EL41): Va = 250 V, Vg2 = 250 V, Rk = 85 Ω, Raa = 7 kΩ (plate-to-plate). Delivers 9.4 W at 4.6% THD.
Pins 3 and 4 are cathode/suppressor internal connections and may be left unconnected at the socket. Pin 7 is the main external cathode connection. All three are electrically the cathode.
In triode connection: strap g2 (pin 5) directly to anode (pin 2). Ra = 3.5 kΩ in the datasheet is the recommended anode load impedance; internal plate resistance in triode mode is not tabulated.