PL833C - Bjl

Penta Laboratories graphite-anode construction enables the PL833C to dissipate a full 550 watts, exceeding industry standards by some 20 percent.
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.567 ± .003

1.50 ±.031 .531 ±.125

GRID TERMINAL

PL833C

ANODE TERMINAL

4

19 MAX. 32

8

5 3 ± 8 16

FILAMENT TERMINAL 0.437 ± .003 0.375 ± .004

Power Triode

0.5 MAX. .812 MIN.

2

1.125 MAX.

1 1 ± 8 16

The PL833C is a tri-electrode tube designed for use as a modulator, amplifier, and oscillator. The exclusive Penta Laboratories graphite-anode construction enables the PL833C to dissipate a full 550 watts, exceeding industry standards by some 20 percent. At maximum ratings, the tube is cooled by forced air flow over the seals and envelop. The PL833C utilizes a thoriated tungsten filament.

ELECTRICAL CHARACTERISTICS Filament -- Thoriated Tungsten Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Amplification Factor (Ec=-20 v, Ib=200 ma) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Interelectrode Capacitances Grid-Plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Grid-Filament . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Plate-Filament . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

10 volts 10 amperes 35 6.3 µµf 12.3 µµf 8.5 µµf

MECHANICAL CHARACTERISTICS Filiment Terminals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Grid and Anode Terminals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Mounting Position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Maximum Envelop Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Maximum Overall Dimensions Length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Net Weight (approximate) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Required Air Flow to Envelop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . MAXIMUM

J1-9 and J1-10 J1-7 Vertical 145º C 8.81250 inches 4.59375 inches 1.025 pounds 40 CFM

Revised 03 Dec 2001

P E N T A

L A B O R A T O R I E S

9740 COZYCROFT AVENUE * CHATSWORTH * CALIFORNIA 91311 (800) 421-4219 * (818) 882-3872 * FAX: (818) 882-3968

ELECTRON TUBES FOR INDUSTRY

PL833C RATINGS AND TYPICAL OPERATING CONDITIONS AF Power Amplifier and Modulator--Class B Maximum Ratings DC Plate Voltage . . . . . . . . . . . . . . . . . . . . . . . Maximum Signal DC Plate Current . . . . . . . . . . Maximum Signal Plate Input . . . . . . . . . . . . . . . Plate Dissipation . . . . . . . . . . . . . . . . . . . . . . . . Typical Operation (Values are for two tubes) DC Plate Voltage . . . . . . . . . . . . . . . . . . . . . . . DC Grid Voltage . . . . . . . . . . . . . . . . . . . . . . . . Peak AF Grid to Grid Voltage . . . . . . . . . . . . . Zero Signal DC Plate Current . . . . . . . . . . . . . Maximum Signal DC Plate Current . . . . . . . . . . Effective Plate to Plate Load Resistance . . . . . Maximum Signal Driving Power (approximate) Maximum Signal Power Output (approximate)

Natural Cooling CCS ICAS 3000 3300 500 500 1125 1300 300 350 Natural Cooling CCS ICAS 3000 3300 -70 -80 400 440 100 100 750 780 9500 10500 20 30 1650 1900

Forced-Air Cooling CCS ICAS 4000 4000 Volts Max. 500 500 Milliamperes Max. 1600 1800 Watts Max. 400 450 Watts Max. Forced-Air Cooling CCS ICAS 4000 4000 Volts -100 -100 Volts 480 510 Volts 100 100 Milliamperes 800 900 Milliamperes 12000 11000 Ω 29 38 Watts 2400 2700 Watts

Natural Cooling CCS ICAS 3000 3300 300 300 450 525 300 350

Forced-Air Cooling CCS ICAS 4000 4000 Volts Max. 300 300 Milliamperes Max. 600 675 Watts Max. 400 450 Watts Max.

RF Power Amplifier--Class B Maximum Ratings DC Plate Voltage . . . . . . . . . . . . . . . . . . . . . . . DC Plate Current . . . . . . . . . . . . . . . . . . . . . . . . Plate Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Plate Dissipation . . . . . . . . . . . . . . . . . . . . . . . .

Typical Operation (Carrier conditions per tube Natural Cooling with a maximum modulation factor of 1.0) CCS ICAS DC Plate Voltage . . . . . . . . . . . . . . . . . . . . . . . . 3000 3300 DC Grid Voltage . . . . . . . . . . . . . . . . . . . . . . . . -70 -100 Peak RF Grid Voltage . . . . . . . . . . . . . . . . . . . . 90 110 DC Plate Current . . . . . . . . . . . . . . . . . . . . . . . . 150 150 DC Grid Current (approximate) . . . . . . . . . . . . . 2 2 Driving Power (approximate) . . . . . . . . . . . . . . . 10 11 Power Output (approximate) . . . . . . . . . . . . . . . 150 200

Forced-Air Cooling CCS ICAS 4000 4000 Volts -120 -120 Volts 120 130 Volts 150 150 Milliamperes 2 3 Milliamperes 14 21 Watts 225 250 Watts

Plate Modulated RF Power Amplifier--Class C Telephony Maximum Ratings DC Plate Voltage . . . . . . . . . . . . . . . . . . . . . . . . DC Grid Voltage . . . . . . . . . . . . . . . . . . . . . . . . DC Plate Current . . . . . . . . . . . . . . . . . . . . . . . . DC Grid Current . . . . . . . . . . . . . . . . . . . . . . . . . Plate Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Plate Dissipation . . . . . . . . . . . . . . . . . . . . . . . .

Natural Cooling CCS ICAS 2500 3000 -500 -500 400 400 100 100 835 1000 200 250

Page Two

Forced-Air Cooling CCS ICAS 3000 4000 Volts Max. -500 -500 Volts Max. 450 450 Milliamperes Max. 100 100 Milliamperes Max. 1250 1800 Watts Max. 270 350 Watts Max.

PL833C Plate Modulated RF Power Amplifier--Class C Telephony (continued) Typical Operation (Carrier conditions per tube with a maximum Natural Cooling modulation factor of 1.0) CCS ICAS DC Plate Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . 2500 3000 DC Grid Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . -300 -240 Peak RF Grid Voltage . . . . . . . . . . . . . . . . . . . . . . 460 410 DC Plate Current . . . . . . . . . . . . . . . . . . . . . . . . . . 335 335 DC Grid Current (approximate) . . . . . . . . . . . . . . . 75 70 Driving Power (approximate) . . . . . . . . . . . . . . . . . 30 26 Power Output (approximate) . . . . . . . . . . . . . . . . . 635 800

Forced-Air Cooling CCS ICAS 3000 4000 Volts -300 -325 Volts 490 520 Volts 415 450 Milliamperes 85 90 Milliamperes 37 42 Watts 1000 1500 Watts

RF Power Amplifier and Oscillator Class C Telephony Maximum Ratings DC Plate Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . DC Grid Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . DC Plate Current . . . . . . . . . . . . . . . . . . . . . . . . . . DC Grid Current . . . . . . . . . . . . . . . . . . . . . . . . . . . Plate Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Plate Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . .

Natural Cooling CCS ICAS 3000 3300 -500 -500 500 500 100 100 1250 1500 300 350

Typical Operation (Key-down conditions per tube without Natural Cooling amplitude modulation) CCS ICAS DC Plate Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . 3000 3000 DC Grid Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . -200 -160 Peak RF Grid Voltage . . . . . . . . . . . . . . . . . . . . . . 360 310 DC Plate Current . . . . . . . . . . . . . . . . . . . . . . . . . . 415 335 DC Grid Current (approximate) . . . . . . . . . . . . . . . 55 70 Driving Power (approximate) . . . . . . . . . . . . . . . . . 20 20 Power Output (approximate) . . . . . . . . . . . . . . . . . 1000 800

Forced-Air Cooling CCS ICAS 4000 4000 Volts Max. -500 -500 Volts Max. 500 500 Milliamperes Max. 100 100 Milliamperes Max. 1800 2000 Watts Max. 400 450 Watts Max. Forced-Air Cooling CCS ICAS 4000 4000 Volts -200 -225 Volts 375 415 Volts 450 500 Milliamperes 75 95 Milliamperes 26 35 Watts 1440 1600 Watts

APPLICATION NOTES Maximum ratings apply at frequencies up to 20 megacycles. The tube may be operated at higher frequencies provided the maximum values of the plate voltage and plate input are reduced according to the table below. Special attention should be given to insuring that adequate ventilation is provided at these frequencies. Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Natural Cooling Forced-Air Cooling Percent Of Maximum Rated Plate Voltage and Plate Input 30 50 75 20 50 75 Megacycles Class B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Class C Plate Modulated . . . . . . . . . . . . . . . . . . 100 98 94 100 97 93 Percent Class C Unmodulated . . . . . . . . . . . . . . . . . . . . 100 90 72 100 83 65 Percent 100 90 72 100 83 65 Percent Page Three

PL833C 1.0

PL833C Typical Characteristics Ef=10 Volts AC

0.8

Ec=+350

0.6

Ec=+300

0.4

0.2

Ec=+250

Ec=+200

Ec=+50

0

Ec=+100

500 1000 PLATE VOLTAGE IN VOLTS

Page Four

Ec=+150

1500

PL833C 5 Ec=Eb

PL833C Average Plate Characteristics Ef=10 Volts AC

Ec=+350

4

Ec=+300 Ec=+250

3

Ec=+200 Ec=+150

2 Ec=+100 Ec=+50

1

Ec=+0 Ec=+.50 Ec=+.100

0

1000

2000 PLATE VOLTAGE IN VOLTS

Page Five

3000

4000