Data set 01
1944 Hytron
Published operating points and test conditions from this source.
SECTION 1
Triode
Characteristics
Heater or filament current
3.5 A
Published nominal value
Power - Triode ·Triode
HY51A
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.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- -
- Socket code
- UX4
- Base pins
- 4
- Nominal heater
- 7.5 V / 3.5 A
Description
2 - 38 HTRONIC Engineering Bulletin 51 - 1 Type HY51A-HY51B PHYSICAL DATA Plate Processed Graphite Grid Molybdenum-Nickel Filament Thoriated Tungsten Insulation Processed Lava Base 4 Pin UX Iso. Plate Lead Large Metal Cap Max., Overall Length 6 9/16" Max, Diameter 2 7/16" Bulb ST-19 Net Weight 3 1/4 oz. INTERELECTRODE CAPACITANCE Grid to Plate 7.5 uuf Grid to Filament 6.0 uuf Plate to Filament 2.0 uuf ELECTRICAL DATA HY51A HY51B Fi{lament Voltage 7.5 Volts 10.0 Volts Filament Current 3.5 Amperes 2.25 Amperes D.C. Plate Voltage 1000. Volts Max. Plate Dissipation 65. Watts Max. Max., Plate Current 155. ma. Max. Grid Current 25, ma. Average Amp. Factor 25 Mutual Conductance 6500 unthos BASE PIN
Socket description
Medium-shell UX 4-contact
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- -
- Socket code
- UX4
- Base pins
- 4
- Nominal heater voltage
- 7.5 V
- Nominal heater current
- 3.5 A
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- No
Terminal pinout
Electrical assignments shared by every tube using this base designation.
No verified pinout is recorded for this base designation.
Section ratings
1 physical section, each with unique specifications.
Section 1
Triode
X-ray radiationInterelectrode capacitances
- Transconductance
- 0.0065 S
- Amplification factor
- 25
- Max plate voltage
- 1000 V
- Max plate dissipation
- 65 W
- Max cathode current
- 155 mA
Promoted ratings/characteristics from HY51A.pdf.
Source-dependent data
Operating conditions by source
Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.