Power - Triode ·Triode
Power transmitting triode intended for RF amplification, oscillation, or related professional service. Manufacturer documentation emphasizes radio-frequency operation, substantial plate loading, and transmitter or industrial applications.
Triode. M.4205-E valve is similar to 4205-E but has the grid and anode specially.
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
Published ratings and characteristics promoted where directly established by the datasheet.
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.
Anode-grid capacitance
4.8 pF
Anode-filament capacitance
3.3 pF
Grid-filament capacitance
5.2 pF
Maximum direct anode current
50 mA
Maximum direct grid current
10 mA
Maximum frequency for full ratings
15 MHz
Anode voltage at 30 MHz
300 V
30MHz
Data set 02
Published operating points and test conditions from this source.
Mutual conductance
2000 µS
Published characteristic; normalized from mA/V
Maximum direct anode current
50 mA
Maximum safe operating rating