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Power - Triode (over 1000V 100W) ·Triode

805

Transmitting power triode intended for RF amplifier and oscillator service, with manufacturer ratings emphasizing radio-frequency output, substantial plate loading, and professional transmitter operation.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: UX4
Base pins: 4
Nominal heater: 10 V / 3.25 A

Description

High-mu transmitting triode for RF amplifier, oscillator and Class-B audio-amplifier service.

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: 10 V
Nominal heater current: 3.25 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: 0.0048 S
Amplification factor: 50
Max plate voltage: 1500 V
Max plate dissipation: 125 W
Max cathode current: 210 mA

Maximum ratings and characteristic constants promoted where reliably published in the approved sheet.

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.

Data set 01

1938 RCA Transmitting Tubes

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

of the RCA-805 is
125 W
of the RCA-805 is 125 watts for class C telegraph and class B services.
D-C Plate Voltage
1500 V
D-C Plate Voltage -- 1500 max. Volts
D-C Plate Voltage- 1250
1500 V
D-C Plate Voltage- 1250 1500 Volts
D-C Plate Voltage
1500 V
D-C Plate Voltage. 1500 max. Volts
D-C Plate Current
150 mA
D-C Plate Current- 150 max. Milliamperes
Plate Input
185 W
Plate Input- 185 max. Watts
D-C Plate Voltage- 1250
1500 V
D-C Plate Voltage- 1250 1500 Volts
D-C Grid Current (Approx.) 15
15 mA
D-C Grid Current (Approx.) 15 15 Milliamperes
D-C Plate Current
175 mA
D-C Plate Current . 175 max. Milliamperes
D-C Plate Voltage....... 1000
1250 V
D-C Plate Voltage....... 1000 1250 Volts
D-C Grid Voltage
-500 V
D-C Grid Voltage .... -500 max. Volts
D-C Grid Current .... . ... M
70 mA
D-C Grid Current .... . ... M 70 max. Milliamperes
D-C Grid Current (Approx.) -- 40 40
40 mA
D-C Grid Current (Approx.) -- 40 40 40 Milliamperes
Driving Power (Approx.)- 8.5 8.5
8.5 W
Driving Power (Approx.)- 8.5 8.5 8.5 Watts
Power Output (Approx.)- 130 170
215 W
Power Output (Approx.)- 130 170 215 Watts
For high-frequency operation above
30 MHz
For high-frequency operation above 30 megacycles, see page 144.

Data set 02

1940 Taylor Tubes

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

Grid-to-plate capacitance
7.7 pF
Grid-to-filament capacitance
8.4 pF
Plate-to-filament capacitance
13 pF

Other

Maximum plate current
210 mA
ClassC Telegraphy
Maximum grid current
70 mA
ClassC Telegraphy
Power output
270 W
ClassC Telegraphy PlateVoltage=1750V

Data set 03

1945 United Electronics

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

Filament voltage
10 V
Filament current
3.25 A

Other

Maximum direct plate voltage
1500 V
Maximum plate dissipation
125 W
Maximum direct plate current
125 mA

Data set 04

1950 General Electric Transmitting Types

Published operating points and test conditions from this source.

SECTION 1

Triode

Application

Service
Audio/RF power amplifier and oscillator

Data set 05

1953 Amperex

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

Transconductance
4800 µS
Amplification Factor
50

Other

Maximum Plate Voltage
1500 V
Maximum Plate Dissipation
125 W
Maximum Cathode Current
210 mA

Data set 06

1956 RCA Transmitting Tubes

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Maximum Plate Voltage
1500 V
Maximum Plate Dissipation
125 W
Maximum Cathode Current
210 mA
Full-Input Operating Frequency Maximum
30 MHz
Power Output
370 W
ClassB,AF,TwoTubes

Data set 07

1958 Amperex Industrial

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Maximum plate voltage
1500 V
Published Amperex table
Power output
215 W
Published Amperex table
Plate dissipation
125 W
Published Amperex table
Plate current
200 mA
Published Amperex table
Grid bias
105 V
Published Amperex table
Grid current
25 mA
Published Amperex table
Maximum frequency
30 MHz
Published Amperex table

Characteristic

Amplification factor
50
Published Amperex table
Heater/filament voltage
10 V
Published Amperex table
Heater/filament current
3.25 A
Published Amperex table

Data set 08

1963 Amperex Condensed

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Plate voltage
1500 V
RFPower
Plate current
200 mA
RFPower
Power output
215 W
RFPower
Grid voltage
-105 V
RFPower
Grid current
0.04 mA
RFPower
Maximum frequency
30 MHz
RFPower

Capacitance

Grid-to-plate capacitance
6.5 pF
Input capacitance
8.5 pF
Output capacitance
10.5 pF