Voltage - Triode (single) ·Triode
Victoreen 5828 directly heated 1.25 V 10 mA subminiature medium-mu triode for portable Geiger counters, DC amplification and pulse-shaping circuits.
Subminiature medium-mu triode intended for input-stage grid-current amplifiers and low-voltage multivibrator or pulse-shaping circuits.
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
Victoreen Instrument Co 5828, RMA Release #750 Apr 22 1949, March 1949 datasheet. Directly heated low-filament-power subminiature medium-mu triode intended for portable Geiger counters, cathode-follower preamplifiers, multivibrator pulse shaping and DC amplifiers; suggested replacement for VX-U1A high-mu triode connection. Filament nominal 1.25 V 10 mA, allowed 1.1–1.5 V, filament resistance 112–137 Ω (nominal 125 Ω). Max total cathode current 750 µA. At filament 1.25 V, plate 50 V, grid -0.5 V, plate current 400–700 µA; at grid -4.5 V, plate current <=1 µA. Minimum transconductance 400 µmhos = 0.0004 A/V under specified 50 V/-0.5 V conditions; amplification factor minimum 16, maximum 19. The 50 V plate value is a test operating point, not published max plate voltage. No conventional plate resistance or max plate dissipation stated. Four flexible leads with red identification dot, filament polarity and grid/plate connections shown in source diagram.
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
1.1 to 1.5 V
Filament Current
10 mA
Nominal
Transconductance
400 umho
Amplification Factor
16 to 19
Total Cathode Current
750 uA
Plate Current
- to 700 uA