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Power - Triode ·Triode

800

Medium-mu RCA transmitting triode for RF and Class B audio power service. With 35 W plate dissipation and 1.25 kV capability, it operates to about 60 MHz and supports substantial push-pull audio output.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
MEDIUM4BAYONET
Base pins
-
Nominal heater
7.5 V / 3.25 A

Description

The RCA 800 is a thoriated-tungsten power triode for AF amplification/modulation and RF amplification/oscillation.

Socket description

Medium 4-contact bayonet base

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
MEDIUM4BAYONET
Base pins
-
Nominal heater voltage
7.5 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
Amplification factor
15
Max plate voltage
1250 V
Max plate dissipation
35 W

Published ratings and characteristics from source 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

  • frequencies as high as

    60 MHz

    frequencies as high as 60 megacycles. The maximum plate dissipation for class B

  • and class C telegraph services is

    35 W

    and class C telegraph services is 35 watts. The grid and plate leads of the 800

  • Peak A-F Grid-to-Grid Voltage- 320 300

    300 V

    Peak A-F Grid-to-Grid Voltage- 320 300 300 Volts

  • Max.-Sig. D-C Plate Current- 210 160

    130 mA

    Max.-Sig. D-C Plate Current- 210 160 130 Milliamperes

  • Effective Load Res. (Plate-to-plate).. 6400 12500

    21000 Ω

    Effective Load Res. (Plate-to-plate).. 6400 12500 21000 Ohms

  • Max.-Sig. Driving Power (Approx.)... 6 4.4

    3.4 W

    Max.-Sig. Driving Power (Approx.)... 6 4.4 3.4 Watts

  • Max.-Sig. Power Output (Approx.)- 90 100

    106 W

    Max.-Sig. Power Output (Approx.)- 90 100 106 Watts

  • D-C Plate Voltage

    1000 V

    D-C Plate Voltage ... ................................... 1000 max. Volts

  • D-C Grid Voltage

    -400 V

    D-C Grid Voltage.. -400 max. Volts

  • D-C Grid Current

    25 mA

    D-C Grid Current . 25 max. Milliamperes

  • Pi ATP Twpttt

    80 W

    Pi ATP Twpttt .. 80 max. Watts

  • D-C Plate Voltage.. . 750

    1000 V

    D-C Plate Voltage.. . 750 1000 Volts

  • D-C Grid Current (Approx.) --- .. 15

    15 mA

    D-C Grid Current (Approx.) --- .. 15 15 Milliamperes

  • Grid Resistor .-. . 10000

    13300 Ω

    Grid Resistor .-. . 10000 13300 Ohms

  • Driving Power (Approx.)- . 3

    4 W

    Driving Power (Approx.)- . 3 4 Watts

  • D'C Plate

    80 mA

    D'C Plate . 80 max. Milliamperes

  • Plate Dissipation

    35 W

    Plate Dissipation - ---- ................. 35 max. Watts

  • D-C Plate Voltage ..... 750 1000

    1250 V

    D-C Plate Voltage ..... 750 1000 1250 Volts

  • Peak R-F Grid Voltage.. 225 260

    300 V

    Peak R-F Grid Voltage.. 225 260 300 Volts

  • D-C Plate Current - 70 70

    70 mA

    D-C Plate Current - 70 70 70 Milliamperes

  • D-C Grid Current (Approx.)- 15 15

    15 mA

    D-C Grid Current (Approx.)- 15 15 15 Milliamperes

  • Driving Power (Approx.) - 2 3

    4 W

    Driving Power (Approx.) - 2 3 4 Watts

  • Power Output (Approx.) - 35 50

    65 W

    Power Output (Approx.) - 35 50 65 Watts

  • each stated value of grid voltage should be decreased by

    5 V

    each stated value of grid voltage should be decreased by 5 volts and the circuit returns made to the

  • For high-frequency operation above

    60 MHz

    For high-frequency operation above 60 megacycles, see page 144.

Data set 02

1956 RCA Transmitting Tubes

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

  • Maximum Full-Input Frequency

    60 MHz

Other

  • Maximum Plate Current

    80 mA