A2912

Full Input to

400 MHz

Full Input to 400 MHz Beam Power Tube

single sideband equipments. In these equipments it can deliver

500 W

single sideband equipments. In these equipments it can deliver 500 watts peak envelope power output at an open

Its high gain, CERMOLOX tube construction and full input rating to

400 MHz

Its high gain, CERMOLOX tube construction and full input rating to 400 MHz also make it ideally suited for higher

it will deliver one kilowatt peak sync. or

200 W

it will deliver one kilowatt peak sync. or 200 watts carrier output respectively.

To assure compliance with environmental design objectives, sample tubes are regularly subjected to

11 A

To assure compliance with environmental design objectives, sample tubes are regularly subjected to 50g-11 milli-

second shock;

2000 s

second shock; 500g-3/4 millisecond shock; and also 20g-2000 hertz vibration testing.

Voltage®(acorde)

6.3 V

Voltage®(acorde) ........... 6.3 typ. V Terminal Connections See Dimensional Qutline

Current at6

7.5 V

Current at6.3 volts . .......... 7.5 A Radiator ................ Integral part of tube

Grid No.l1toplate

250 pF

Grid No.l1toplate ............ 0.11 max. pF cathode-heater and heater) . ... ... 250 max. °C

Grid No

250 pF

Grid No.1 to cathode & heater . . . . . 28 pF Plate-Core Temperature . ......... 250 max. °C

Plate to cathode & heater

0.011 pF

Plate to cathode & heater ....... 0.011 max. pF Footnotes for General Data

Grid No.ttogridNo

300 pF

Grid No.ttogridNo.2 ......... 38 pF 9 See V.A.3 of 1CE-300.

Grid No

5.5 pF

Grid No.2toplate ............ 5.5 pF Measured with special Adapter.

Grid No

1.1 pF

Grid No.2 to cathode & heater . . . .. 1.1 max. pF € See Dimensional Qutline for temperature measurement points.

Up to

30 MHz

Up to 400 MHz Modulation'’: at 30 Mc

DC PLATE VOLTAGE

3000 V

DC PLATE VOLTAGE . ........ 3,000 max. V DC Plate Voltage . . . . ...

DC GRID-No

350 V

DC GRID-No.2 VOLTAGE . ...... 750 max. V DC Grid-No.2 Voltage ... ... 450 450 350 V

DC PLATE CURRENT AT DC Grid-No

26 V

DC PLATE CURRENT AT DC Grid-No.1 Voltage ... ... -34 -32 26 V

PEAK OF ENVELOPE®

750 mA

PEAK OF ENVELOPE®. . ... .. 750 max. mA Zero-Signal DC Plate

GRID No

200 mA

GRID No.2 INPUT ............ 25 max. W Carrent . ............ 250 250 200 mA

GRID-No

430 mA

GRID-No.1 CIRCUIT of Envelope .......... 535 545 430 mA

With cathode bias . .. ........ Not recommended Peak of Envelope

4 mA

With cathode bias . .. ........ Not recommended Peak of Envelope -1.2 4.2 —4.0 mA

IMPEDANCE . . . . oo oot See Note f Current ............. —

-3 mA

IMPEDANCE . . . . oo oot See Note f Current ............. —4.0 —4.0 -3.0 mA

GRID-No

22 V

GRID-No.2 CIRCUIT Peak RF Grid-No.1 Voltage ". . 30 40 22 V

DC PLATE VOLTAGE

420 V

DC PLATE VOLTAGE .......... 3000 max. V In a cathode drive circuit, at 420 MHz with an output

DC GRID-No

10 V

DC GRID-No.2 VOLTAGE . ....... 750 max. V circuit bandwidth of 10.0 MHz.

DCPLATE CURRENT

500 mA

DCPLATE CURRENT .......... 500 max. mA DC Plate Voltage

GRID-No

2 V

GRID-No.2 INPUT. . .. .......... 25 max. W DC Grid-No.2 Voltage . .............

PLATE DISSIPATION

45 V

PLATE DISSIPATION . . ... ...... 1000 max. W DC Grid-No.1 Voltage . ............. —45 V

DCPlate Current

340 mA

DCPlate Current . ... ............. 340 mA

DC GridNo

-2 mA

DC GridNo.2 Current . ............. -2.0 mA

high as

750 mA

high as 750 mA. times tube output capacity.

Ep=

2000 V

Ep= 2500 VOLTS b= 2000 VOLTS

30| E2,< 350 VOLTS 30| Eg,

30 V

30| E2,< 350 VOLTS 30| Eg,

= 450 VOLTS

450 V

= 450 VOLTS

Ip= I5

0 mA

Ip= I50mA

&£ -30 I, =] 150mA

150 mA

&£ -30 I, =] 150mA

3 b 150mA

150 mA

3 b 150mA

Grid-Modulated RF Power Amplifier — Calculated Operation jn Grid-Drive Circuit at

216 A

Grid-Modulated RF Power Amplifier — Calculated Operation jn Grid-Drive Circuit at 216 MHz

Class C Television Service Bandwidth of

8.5 MHz

Class C Television Service Bandwidth of 8.5 MHz"

Synchronizing-level conditions pertube unless otherwise DC Plate Voltage

2700 V

Synchronizing-level conditions pertube unless otherwise DC Plate Voltage . .. ... .. ..... . ..... 2700 V

specified DC Grid-No

450 V

specified DC Grid-No.2 Voltage . ... .. ... ... .. ..., 450 V

Maximum CCS Ratings, Absolute-Maximum Values: DC Grid-No

1 V

Maximum CCS Ratings, Absolute-Maximum Values: DC Grid-No.1 Voltage:

Up to2

70 MHz

Up to216 MHz Synchronizing level . ... ... ... .. ...... ~70 V

DC PLATE VOLTAGE

80 V

DC PLATE VOLTAGE ... ... .. .. .... 3000 max. Pedestal level ... ... ... ... ... ........ ~80 V

DC GRID-No

-110 V

DC GRID-No.2 VOLTAGE . ........... 750 max. Whitelevel .. .... ... ... ... ........ —-110 V

DC GRID-No

70 V

DC GRID-No.1 VOLTAGE Peak RF Grid-No.1 Voltage ... ........... 70 V

DC PLATE CURRENT

700 mA

DC PLATE CURRENT .. ............ 750 max Synchronizing level ... ... ........... 700 mA

GRID-NO

500 mA

GRID-NO.2 INPUT .+ -+« v v v v v v e e e v 25 max Pedestal level .. ... .. ... .. ... ..., 500 mA

HEATER VOLTAGE (E{)=

6.3 V

HEATER VOLTAGE (E{)= 6.3V BEE HEATER VOLTAGE

GRID No

450 V

GRID No.2 VOLTAGE (Ecz) =350V i GRID No.2 VOLTAGE (ECZ) =450V maas

7 @ 10 T T} - 2800mA

2800 mA

7 @ 10 T T} - 2800mA

H t [amma i

17 mA

H t [amma i 17 : E

1. HeaterCurrent . . . ... ....... i 6.9 8.3 A Grid No.1 to grid No.2

41 pF

1. HeaterCurrent . . . ... ....... i 6.9 8.3 A Grid No.1 to grid No.2 ... ... k 34 41 pF

2. Direct Interelectrode Grid No.2 to plate . . ..... .. k 4.3 6.3 pF

6.3 pF

2. Direct Interelectrode Grid No.2 to plate . . ..... .. k 4.3 6.3 pF

Grid No

50 pF

Grid No.1 to plate . . . ... ... k — 0.11 pF 3. Reverse Grid-No.l current .. ... j,m — =50 HA

& heater . ... ... ....... k

5 pF

& heater . ... ... ....... k 26 32 pF 5. Interelectrode Leakage

& heater . . ... ... ...... k

87 pF

& heater . . ... ... ...... k 0.011 pF 6. Cutoff Grid-No.1 Voltage . .. ... i,s — 87 A"

M With dc plate voltage of

2 V

M With dc plate voltage of 2500 volts, dc grid-No.2 voltage r

of 400 volts, and dc grid-No.1 voltage adjusted to give a 30 minutes w

30 V

of 400 volts, and dc grid-No.1 voltage adjusted to give a 30 minutes without any voltages applied to the tube. The

" See V.A

0 V

" See V.A.3 of 1CE-300. across heaterterminals) 1s measured with a200-volt Megger-

type ohmmeterhaving an internal impedance of

1 ohm

type ohmmeterhaving an internal impedance of 1.0 megohm.

together; and pulse voltage source of

850 V

together; and pulse voltage source of 850 peak volts, s

With dc plate voltage of

2 V

With dc plate voltage of 2500 volts, dc grid-No.2 voltage

between plate and cathode. Pulse duration is

400 V

between plate and cathode. Pulse duration is 2 micro- of 400 volts, and dc grid-No.l voltage adjusted to give a

seconds, pulse repetition frequency is

5 s

seconds, pulse repetition frequency is 60 pps, and duty plate current of 5 mA.

grid-No

750 V

grid-No.1 voltages. In typical operation at 750 watts

RESISTANCE Average DC Plate Current

320 mA

RESISTANCE Average DC Plate Current ... 400 410 320 mA

plate current of

240 mA

plate current of 240 mA. minimum resistance between any two electrodes (except

PRESSURE DROP — INCHES H,

0 in

PRESSURE DROP — INCHES H,0