Power - Triode ·Triode
Filamentary transmitting triode for radio-frequency amplifier and oscillator service. Manufacturer ratings and operating conditions identify it as an RF power device rather than a receiving or small-signal triode.
Solid-plate medium-gain directly heated driver/output triode. The supplied Emission Labs sheet was read for filament data, maximum ratings, representative operating points, gm/rp/mu, output conditions, capacitances, and rectifier filter conditions as applicable.
Medium-shell UX 4-contact
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.
1 physical section, each with unique specifications.
Section 1
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.
Filament voltage
5 V
Filament current
1.4 A
Factory test plate voltage
420 V
Factory test plate current
42 mA
Factory test grid voltage
-9.9 V
Plate resistance
3000 ohm
Amplification factor
21
Transconductance
6900 uS
Maximum continuous plate dissipation
25 W