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

3R252E

Water-cooled industrial power triode for very high-power RF-heating oscillator applications. With 24 kW plate dissipation, published operating conditions provide roughly 40–50 kW RF output at frequencies to about 30 MHz.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
8 V / 300 A

Description

The 3R252E is a water-cooled industrial triode for high-power industrial RF heating oscillator applications.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
-
Base pins
-
Nominal heater voltage
8 V
Nominal heater current
300 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
Max plate voltage
13000 V
Max plate dissipation
24000 W
Max grid dissipation
1000 W

Published maximum ratings and characteristics audited; remaining values retained densely in parameter table.

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

1962 ITT

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Filament voltage [1]

    8129 V

    Filament voltage 8129, 815% v

  • Filament voltage [2]

    815 V

    Filament voltage 8129, 815% v

  • *Filament <urrent, nominal o,

    125

    *Filament <urrent, nominal o, 125 A

  • Filament current

    12 A

    Filament current 12 A

  • Filament voltage range [1]

    13 V

    Filament voltage range 013 to 0:14 \4

  • Filament voltage range [2]

    0 V

    Filament voltage range 013 to 0:14 \4

  • Filament voltage range [3]

    14 V

    Filament voltage range 013 to 0:14 \4

  • Filament voltage range [4]

    4 V

    Filament voltage range 013 to 0:14 \4

  • Mutual conductance | at Va = [1]

    4 mA/V

    Mutual conductance | at Va = 4kV, Vg .= 75V &0 mA/V

  • Mutual conductance | at Va = [2]

    75 mA/V

    Mutual conductance | at Va = 4kV, Vg .= 75V &0 mA/V

  • Mutual conductance | at Va = [3]

    0 mA/V

    Mutual conductance | at Va = 4kV, Vg .= 75V &0 mA/V

  • Grid to anode

    30

    Grid to anode 30 pF

  • Grid to filament

    80

    Grid to filament . 80 pF

  • Anode to filament

    18

    Anode to filament 18 pF

  • Water flow required for full ancde dissipation [1]

    3 W

    Water flow required for full ancde dissipation 3 gal/min 13 {min

  • Water flow required for full ancde dissipation [2]

    13 W

    Water flow required for full ancde dissipation 3 gal/min 13 {min

  • Maximum temperature of ofi;flowing water

    70

    Maximum temperature of ofi;flowing water 70 °C

  • direct voltage plus ripple)

    13 kV

    direct voltage plus ripple) 13 kv

  • Maximum direct anode current

    6 mA

    Maximum direct anode current 6 A

  • Maximum direct anode dissipation (continuous)

    24 kW

    Maximum direct anode dissipation (continuous) 24 kw

  • Maximum direct grid dissipation {continuous)

    500 W

    Maximum direct grid dissipation {continuous) 500 w

  • Direct anode voltage

    12 kV

    Direct anode voltage 12 kv

  • Direct grid voltage

    680 V

    Direct grid voltage 680 N

  • Peak r.f. grid voltage

    990 V

    Peak r.f. grid voltage 990 v

  • *Direct grid current

    800 mA

    *Direct grid current 800 mA

  • *Grid dissipation

    275 W

    *Grid dissipation . 275 w

  • Power output

    48 kW

    Power output 48 kwW

  • Efficiency ’

    80

    Efficiency ’ 80 %

  • Published value

    2

    2 FILAMENT

  • y

    3

    y 3 GRID

  • Published value

    4

    4 ANODE

  • Anode voltage (peak velue of direct voltage plus ripple)

    70 kV

    Anode voltage (peak velue of direct voltage plus ripple) 7,0 kV

  • Direct anode current

    10 A

    Direct anode current : 10 A

  • Anode dissipation, continuous

    24 kW

    Anode dissipation, continuous 24 kW

  • Grid dissipation, continuous

    10 kW

    Grid dissipation, continuous 1,0 kW

  • Direct negative grid voltage [1]

    -1 V

    Direct negative grid voltage -1 500 vV

  • Direct negative grid voltage [2]

    500 V

    Direct negative grid voltage -1 500 vV

  • Maximum frequency for above ratings

    30 MHz

    Maximum frequency for above ratings 30 MHz

  • Filament voltage

    80 V

    Filament voltage 8,0v

  • Filament current, nominal [1]

    300 A

    Filament current, nominal 300 300 A

  • Filament current, nominal [2]

    300 A

    Filament current, nominal 300 300 A

  • Direct anode voltage [1]

    60 kV

    Direct anode voltage 6,0 6,5 kV

  • Direct anode voltage [2]

    65 kV

    Direct anode voltage 6,0 6,5 kV

  • Direct grid voltage [1]

    -850 V

    Direct grid voltage -850 -325 v

  • Direct grid voltage [2]

    -325 V

    Direct grid voltage -850 -325 v

  • Direct anode current [1]

    90 A

    Direct anode current 9,0 9,9 A

  • Direct anode current [2]

    99 A

    Direct anode current 9,0 9,9 A

  • Peak r.f., grid voltage [1]

    1 V

    Peak r.f., grid voltage 1 270 1 375 v

  • Peak r.f., grid voltage [2]

    270 V

    Peak r.f., grid voltage 1 270 1 375 v

  • Peak r.f., grid voltage [3]

    1 V

    Peak r.f., grid voltage 1 270 1 375 v

  • Peak r.f., grid voltage [4]

    375 V

    Peak r.f., grid voltage 1 270 1 375 v

  • Direct grid current (Ngte [1]

    1 A

    Direct grid current (Ngte 1) 1,37 (2,0) 1,37 (2,3) A

  • Direct grid current (Ngte [2]

    137 A

    Direct grid current (Ngte 1) 1,37 (2,0) 1,37 (2,3) A

  • Direct grid current (Ngte [3]

    20 A

    Direct grid current (Ngte 1) 1,37 (2,0) 1,37 (2,3) A

  • Direct grid current (Ngte [4]

    137 A

    Direct grid current (Ngte 1) 1,37 (2,0) 1,37 (2,3) A

  • Direct grid current (Ngte [5]

    23 A

    Direct grid current (Ngte 1) 1,37 (2,0) 1,37 (2,3) A

  • Anode dissipation [1]

    13 kW

    Anode dissipation 13 15,5 - kW

  • Anode dissipation [2]

    155 kW

    Anode dissipation 13 15,5 - kW

  • Grid dissipation (Note [1]

    1 W

    Grid dissipation (Note 1) 590 630 W

  • Grid dissipation (Note [2]

    590 W

    Grid dissipation (Note 1) 590 630 W

  • Grid dissipation (Note [3]

    630 W

    Grid dissipation (Note 1) 590 630 W

  • Grid resistor [1]

    620

    Grid resistor 620 680 Q

  • Grid resistor [2]

    680

    Grid resistor 620 680 Q

  • Power output [1]

    41 kW

    Power output 41 48 kW

  • Power output [2]

    48 kW

    Power output 41 48 kW

  • Power output, less drive [1]

    39 kW

    Power output, less drive 39 46 kW

  • Power output, less drive [2]

    46 kW

    Power output, less drive 39 46 kW

  • Power into load at [1]

    85 kW

    Power into load at 85% transfer efficiency 33 39 kW

  • Power into load at [2]

    33 kW

    Power into load at 85% transfer efficiency 33 39 kW

  • Power into load at [3]

    39 kW

    Power into load at 85% transfer efficiency 33 39 kW

  • Filament voltage [1]

    80 V

    Filament voltage 8,0V t 5% 8,0V * 5%

  • Filament voltage [2]

    5 V

    Filament voltage 8,0V t 5% 8,0V * 5%

  • Filament voltage [3]

    80 V

    Filament voltage 8,0V t 5% 8,0V * 5%

  • Filament voltage [4]

    5 V

    Filament voltage 8,0V t 5% 8,0V * 5%

  • Filament current, nominal [1]

    300 A

    Filament current, nominal 300 300 - A

  • Filament current, nominal [2]

    300 A

    Filament current, nominal 300 300 - A

  • Direct anode voltage [1]

    65 kV

    Direct anode voltage 6,5 7,0 kV

  • Direct anode voltage [2]

    70 kV

    Direct anode voltage 6,5 7,0 kV

  • Direct anode current [1]

    2 A

    Direct anode current 2 x 3,2 2 x 5,8 A

  • Direct anode current [2]

    32 A

    Direct anode current 2 x 3,2 2 x 5,8 A

  • Direct anode current [3]

    2 A

    Direct anode current 2 x 3,2 2 x 5,8 A

  • Direct anode current [4]

    58 A

    Direct anode current 2 x 3,2 2 x 5,8 A

  • Grid biss = [1]

    540

    Grid biss =540 ~550 v

  • Grid biss = [2]

    550

    Grid biss =540 ~550 v

  • Grid voltage swing, peak-to-peak [1]

    1 V

    Grid voltage swing, peak-to-peak 1 040 1 420 v

  • Grid voltage swing, peak-to-peak [2]

    40 V

    Grid voltage swing, peak-to-peak 1 040 1 420 v

  • Grid voltage swing, peak-to-peak [3]

    1 V

    Grid voltage swing, peak-to-peak 1 040 1 420 v

  • Grid voltage swing, peak-to-peak [4]

    420 V

    Grid voltage swing, peak-to-peak 1 040 1 420 v

  • Anode-to-anode load [1]

    18

    Anode-to-anode load 1,8 1,3 kQ

  • Anode-to-anode load [2]

    13

    Anode-to-anode load 1,8 1,3 kQ

  • Anode dissipation ' [1]

    2 kW

    Anode dissipation ' 2 x 10 2 x 13 kW

  • Anode dissipation ' [2]

    10 kW

    Anode dissipation ' 2 x 10 2 x 13 kW

  • Anode dissipation ' [3]

    2 kW

    Anode dissipation ' 2 x 10 2 x 13 kW

  • Anode dissipation ' [4]

    13 kW

    Anode dissipation ' 2 x 10 2 x 13 kW

  • Power input [1]

    42 kW

    Power input 42 80 kW

  • Power input [2]

    80 kW

    Power input 42 80 kW

  • Power output [1]

    22 kW

    Power output 22 - 54 kW

  • Power output [2]

    54 kW

    Power output 22 - 54 kW

  • Grid current

    190 mA

    Grid current 190 mA

  • Drive power (Note [1]

    2 W

    Drive power (Note 2) 2-x 135 W