Power - Pentode (NOT beam) ·Diode-Pentode
Four-volt double-diode/power-pentode combination integrating radio detection with approximately 4.3 W audio output.
4 V duodiode plus high-sensitivity power pentode. Electrical ratings and operating characteristics were extracted from the supplied 4-volt valve data table, including the published heater data and available section-level values.
European 8-pin side-contact base
General specifications
Properties common to every published source and operating point.
Electrical assignments shared by every tube using this base designation.
No verified pinout is recorded for this base designation.
2 physical sections, each with unique specifications.
Section 1
No fixed ratings are recorded for this section.
Two diode sections represented once as identical sections.
Section 3
Indirectly heated double-diode output pentode; this sheet identifies the combination and refers to EBL1 for the remaining electrical characteristics.
Source-dependent data
Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.
Data set 01
Published operating points and test conditions from this source.
Typical plate voltage
250 V
Typical plate current
36 mA
Typical screen voltage
250 V
Typical screen current
5 mA
Optimum load resistance
7000 ohm
Power output at 10% distortion
4.3 W
Grid AC input voltage
3.6 V RMS
Maximum anode dissipation
9 W
Transconductance
9500 µS
Plate resistance
50000 ohm