Data set 01
1962 Eimac
Published operating points and test conditions from this source.
Triode
Characteristics
The EIMAC 3CW20,000A3 is a ceramic/metal power triode in
3 a
| The EIMAC 3CW20,000A3 is a ceramic/metal power triode in-
The anode dissipation rating is 20,000 watts with water cooling
20000 watts
| The anode dissipation rating is 20,000 watts with water cooling.
Voltage
7.5 V
GeneralCharacteristics | Voltage .. ... ..o ii i innn.n 7.5:04 V
Curtent, at 7.5V
7.5 A
GeneralCharacteristics | Curtent, at 7.5V . ... .. ............ 100 A
Amplification Factor (Average)
20
GeneralCharacteristics | Amplification Factor (Average) . .......... 20
OT 53 pF
53 pF
GeneralCharacteristics | OT 53 pF
Cout v . v vv ittt i e e 1.35 pF
1.35 v
GeneralCharacteristics | Cout v . v vv ittt i e e 1.35 pF
CgP ettt e e 34 pF
34 pF
GeneralCharacteristics | CgP ettt e e 34 pF
Other
2. Capacitance values are for a cold tube as measured in a special shielded
2 a
MaximumRatings | 2. Capacitance values are for a cold tube as measured in a special shielded
Recommended Air System Socket
1300 v
| Recommended Air System Socket . . ..o v vt i it it it i i e ~ EIMAC SK-1300
Envelope and Ceramic/Metal Seals
250 °C
| Envelope and Ceramic/Metal Seals ... ... ...ttt vnionnnnnsas 250°C
(Effective 8-1-75) © 1963, 1966, 1975 by Varian Printed in U.S.A
8 A
| (Effective 8-1-75) © 1963, 1966, 1975 by Varian Printed in U.S.A.
DC PLATE VOLTAGE
3500 VOLTS
MaximumRatings | DC PLATE VOLTAGE .. ........ 3500 VOLTS DC Grid Current . ... ....... 660 5560 mAdc
DC PLATECURRENT
3 AMPERES
MaximumRatings | DC PLATECURRENT .......... 3.0 AMPERES Driving Power . ............ 530 515 W
GRID DISSIPATION 250 WATTS Plate Output Power
250 WATTS
MaximumRatings | GRID DISSIPATION 250 WATTS Plate Output Power . ........ 9.7 12.4 kW
DC PLATECURRENT
5 AMPERES
MaximumRatings | DC PLATECURRENT ... ....... 5.0 AMPERES Max-Sig DC Grid Current . . .. .. 300 250 mAdc
PLATE DISSIPATION
20 v
MaximumRatings | PLATE DISSIPATION .......... 20 KILOWATTS Peak RF Grid Voltage ........ 540 585 v
GRID DISSIPATION
250 WATTS
MaximumRatings | GRID DISSIPATION . ......... 250 WATTS Driving Power . ............ 1900 2050 W
Plate Output Power
18 kw
MaximumRatings | Plate Output Power . .. ....... 18 20 kw
DC PLATE VOLTAGE
7000 VOLTS
MaximumRatings | DC PLATE VOLTAGE . ........ 7000 VOLTS DE plate Surrent ..ot e
DC PLATE CURRENT
40 AMPERES
MaximumRatings | DC PLATE CURRENT . ........ 4,0 AMPERES p ur ent .. 24 28 KW
GRID DISSIPATION
250 WATTS
MaximumRatings | GRID DISSIPATION .. ....... 250 WATTS Plate Output Power . .. ....... 18.9 22.4 kW
DC PLATE VOLTAGE
7000 VOLTS
MaximumRatings | DC PLATE VOLTAGE .. ....... 7000 VOLTS D pto Surrent e a s A
DC PLATE CURRENT
4 AMPERES
MaximumRatings | DC PLATE CURRENT . ........ 4.0 AMPERES o ari . urrent L.l W c
GRID DISSIPATION
250 WATTS
MaximumRatings | GRID DISSIPATION . .. ...... 250 WATTS Plate Output Power . . . ........ 20.56 24.5 kW
Filament Current at 7.5 Volts
7.5 Volts
NOTE: TYPICAL OPERATION data are obtained by calculation from published characteristic curves or actual mea- | Filament Current at 7.5 Volts . . ... vttt ittt i i it iennneeeeees.. 940 104.0 A
58.0 pF
58 pF
NOTE: TYPICAL OPERATION data are obtained by calculation from published characteristic curves or actual mea- | 58.0 pF
L 1.2 1.5 pF
1.2 pF
NOTE: TYPICAL OPERATION data are obtained by calculation from published characteristic curves or actual mea- | L 1.2 1.5 pF
38.0 pF
38 pF
NOTE: TYPICAL OPERATION data are obtained by calculation from published characteristic curves or actual mea- | 38.0 pF
1. Capacitance values are for a cold tube as measured in a special shielded fixture in accordance with Electronic In
1 a
NOTE: TYPICAL OPERATION data are obtained by calculation from published characteristic curves or actual mea- | 1. Capacitance values are for a cold tube as measured in a special shielded fixture in accordance with Electronic In-
the water of 10°C. Inlet water temperature should FILAMENT OPERATION
10 °C
| the water of 10°C. Inlet water temperature should FILAMENT OPERATION - Filament voltage
never exceed 55°C and outlet water temperature should be measured at the terminals with a 1 per
55 °C
| never exceed 55°C and outlet water temperature should be measured at the terminals with a 1 per-
should never exceed 70°C. Where a liquid cool- cent rms responding meter. The peak emission at
70 °C
| should never exceed 70°C. Where a liquid cool- cent rms responding meter. The peak emission at
3CW20,000A3 by a substantial percentage. It is
3 a
| 3CW20,000A3 by a substantial percentage. It is
ferably above 250 K /cm3. A relative water re- culated through the anode water jacket whenever
250 A
| ferably above 250 K /cm3. A relative water re- culated through the anode water jacket whenever
quired, with 30 to 50 cfm of air at 50°C maximum If the coolant lines are obstructed the coolant
30 °C
| quired, with 30 to 50 cfm of air at 50°C maximum If the coolant lines are obstructed the coolant
precautions must be followed. Design all equip- sue is dependent on frequency. Under 30 MHz,
30 MHz
| precautions must be followed. Design all equip- sue is dependent on frequency. Under 30 MHz,
doors are opened. Interlock switches must not be quencies as low as the 13 and 27 MHz bands
13 MHz
| doors are opened. Interlock switches must not be quencies as low as the 13 and 27 MHz bands.
ohms to 25 ohms, should be used in series with
25 ohms
| ohms to 25 ohms, should be used in series with
supply stored energy exceeds 750 watt seconds,
750 watt
| supply stored energy exceeds 750 watt seconds,
A {4094 14.156
4094 A
| A {4094 14.156 - -j[l040 1056 | - -