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4-400A
Radial Beam Power Tetrode
Data Source
................................... Eimac DS 1/55
Mechanical Data
Base
.......................................... 5-Pin Metal
Shell
Maximum Overall Length ...................... 6-1/8 In.
Maximum Seated Height ....................... 5-3/8 In.
Maximum Diameter ............................ 4 In.
EIA Base ...................................... 5BK
Top Cap ....................................... Skirted Small C1-22
Cathode ....................................... Thoriated Tungsten
Mounting Position ............................. Vertical Base Up or Down
Electrical Data
Filament Voltage
.............................. 5 V
Filament Current .............................. 14.5 A
Direct Interelectrode Capacitances
(approx)
Tetrode
Input ......................................... 12.5 pf
Output ........................................ 4.7 pf
Grid to Plate ................................. 0.12 pf
Maximum Ratings (Design Center Values)
Tetrode (Class C
Amplifier/Oscillator) [CCS]
Plate Voltage ................................. 4000 V
Grid No. 2 Voltage ............................ 600 V
Plate Dissipation ............................. 400 W
Grid No. 2 Dissipation ........................ 35 W
Plate Current ................................. 350 mA
Bulb Temperature (At Hottest Point) ........... 200 °C
Tetrode (Plate Modulated Class C
Amplifier below 75 MHz) [CCS]
Plate Voltage ................................. 3200 V
Grid No. 2 Voltage ............................ 600 V
Negative Grid No. 1 Voltage ................... -500 V
Plate Dissipation ............................. 270 W
Grid No. 2 Dissipation ........................ 35 W
Plate Current ................................. 275 mA
Bulb Temperature (At Hottest Point) ........... 200 °C
Tetrode (Plate Modulated Class C
Amplifier below 30
MHz) [ICAS]
Plate Voltage ................................. 4000 V
Grid No. 2 Voltage ............................ 600 V
Negative Grid No. 1 Voltage ................... -500 V
Plate Dissipation ............................. 270 W
Grid No. 2 Dissipation ........................ 35 W
Plate Current ................................. 275 mA
Bulb Temperature (At Hottest Point) ........... 200 °C
Tetrode (Class AB1 or AB2
Amplifier) [CCS]
Plate Voltage ................................. 4000 V
Grid No. 2 Voltage ............................ 800 V
Plate Dissipation ............................. 400 W
Grid No. 2 Dissipation ........................ 35 W
Plate Current ................................. 350 mA
Grid No. 1 Circuit Resistance
Fixed Bias .................................. 250K Ù
Bulb Temperature (At Hottest Point) ........... 200 °C
Characteristics and
Typical Operation
Class C Amplifier/Oscillator
below 75 MHz [CCS]
Plate Voltage ................................. 2500 V
Grid No. 2 Voltage ............................ 500 V
Grid No. 1 Voltage ............................ -200 V
Peak Grid No. 1 Voltage........................ 300 V
Grid No. 1 Current ............................ 18 mA
Plate Current ................................. 350 mA
Grid No. 2 Current ............. .............. 46 mA
Driving Power ................................. 5.4 W
Power Output (approx) ......................... 640 W
Maximum Frequency ............................. 75 MHz
Class C Amplifier/Oscillator
below 75 MHz [CCS]
Plate Voltage ................................. 3000 V
Grid No. 2 Voltage ............................ 500 V
Grid No. 1 Voltage ............................ -220 V
Peak Grid No. 1 Voltage........................ 320 V
Grid No. 1 Current ............................ 19 mA
Plate Current ................................. 350 mA
Grid No. 2 Current ............. .............. 46 mA
Driving Power ................................. 6.1 W
Power Output (approx) ......................... 800 W
Maximum Frequency ............................. 75 MHz
Class C Amplifier/Oscillator
below 75 MHz [CCS]
Plate Voltage ................................. 4000 V
Grid No. 2 Voltage ............................ 500 V
Grid No. 1 Voltage ............................ -220 V
Peak Grid No. 1 Voltage........................ 320 V
Grid No. 1 Current ............................ 18 mA
Plate Current ................................. 350 mA
Grid No. 2 Current ............. .............. 46 mA
Driving Power ................................. 5.8 W
Power Output (approx) ......................... 1100 W
Maximum Frequency ............................. 75 MHz
Push Pull Class C
Amplifier/Oscillator at 110 MHz [CCS]
Plate Voltage ................................. 3500 V
Grid No. 2 Voltage ............................ 500 V
Grid No. 1 Voltage ............................ -170 V
Grid No. 1 Current ............................ 20 mA
Plate Current ................................. 500 mA
Grid No. 2 Current ............. .............. 34 mA
Driving Power ................................. 20 W
Power Output (approx) ......................... 1160 W
Maximum Frequency ............................. 110 MHz
Push Pull Class C
Amplifier/Oscillator at 110 MHz [CCS]
Plate Voltage ................................. 4000 V
Grid No. 2 Voltage ............................ 500 V
Grid No. 1 Voltage ............................ -170 V
Grid No. 1 Current ............................ 20 mA
Plate Current ................................. 540 mA
Grid No. 2 Current ............. .............. 31 mA
Driving Power ................................. 20 W
Power Output (approx) ......................... 1440 W
Maximum Frequency ............................. 110 MHz
Plate Modulated Class C Amplifier
below 75 MHz [CCS]
Plate Voltage ................................. 2000 V
Grid No. 2 Voltage ............................ 500 V
Grid No. 1 Voltage ............................ -220 V
Peak Grid No. 1 Voltage........................ 290 V
Grid No. 1 Current ............................ 12 mA
Plate Current ................................. 275 mA
Grid No. 2 Current ............. .............. 30 mA
Driving Power ................................. 3.5 W
Power Output (approx) ......................... 380 W
Maximum Frequency ............................. 75 MHz
Plate Modulated Class C Amplifier
below 75 MHz [CCS]
Plate Voltage ................................. 3000 V
Grid No. 2 Voltage ............................ 500 V
Grid No. 1 Voltage ............................ -220 V
Peak Grid No. 1 Voltage........................ 290 V
Grid No. 1 Current ............................ 12 mA
Plate Current ................................. 275 mA
Grid No. 2 Current ............. .............. 28 mA
Driving Power ................................. 3.5 W
Power Output (approx) ......................... 510 W
Maximum Frequency ............................. 75 MHz
Plate Modulated Class C Amplifier
below 75 MHz [CCS]
Plate Voltage ................................. 4000 V
Grid No. 2 Voltage ............................ 500 V
Grid No. 1 Voltage ............................ -220 V
Peak Grid No. 1 Voltage........................ 290 V
Grid No. 1 Current ............................ 12 mA
Plate Current ................................. 275 mA
Grid No. 2 Current ............. .............. 26 mA
Driving Power ................................. 3.5 W
Power Output (approx) ......................... 630 W
Maximum Frequency ............................. 75 MHz
Plate Modulated Class C Amplifier
below 30 MHz [ICAS]
Plate Voltage ................................. 2000 V
Grid No. 2 Voltage ............................ 500 V
Grid No. 1 Voltage ............................ -220 V
Peak Grid No. 1 Voltage........................ 290 V
Grid No. 1 Current ............................ 12 mA
Plate Current ................................. 275 mA
Grid No. 2 Current ............. .............. 30 mA
Driving Power ................................. 3.5 W
Power Output (approx) ......................... 380 W
Maximum Frequency ............................. 30 MHz
Plate Modulated Class C Amplifier
below 30 MHz [ICAS]
Plate Voltage ................................. 2500 V
Grid No. 2 Voltage ............................ 500 V
Grid No. 1 Voltage ............................ -220 V
Peak Grid No. 1 Voltage........................ 290 V
Grid No. 1 Current ............................ 12 mA
Plate Current ................................. 275 mA
Grid No. 2 Current ............. .............. 28 mA
Driving Power ................................. 3.5 W
Power Output (approx) ......................... 510 W
Maximum Frequency ............................. 30 MHz
Plate Modulated Class C Amplifier
below 30 MHz [ICAS]
Plate Voltage ................................. 3000 V
Grid No. 2 Voltage ............................ 500 V
Grid No. 1 Voltage ............................ -220 V
Peak Grid No. 1 Voltage........................ 290 V
Grid No. 1 Current ............................ 12 mA
Plate Current ................................. 275 mA
Grid No. 2 Current ............. .............. 26 mA
Driving Power ................................. 3.5 W
Power Output (approx) ......................... 630 W
Maximum Frequency ............................. 30 MHz
Plate Modulated Class C Amplifier
below 30 MHz [ICAS]
Plate Voltage ................................. 3650 V
Grid No. 2 Voltage ............................ 500 V
Grid No. 1 Voltage ............................ -225 V
Peak Grid No. 1 Voltage........................ 315 V
Grid No. 1 Current ............................ 13 mA
Plate Current ................................. 275 mA
Grid No. 2 Current ............. .............. 23 mA
Driving Power ................................. 4.0 W
Power Output (approx) ......................... 765 W
Maximum Frequency ............................. 30 MHz
Push Pull Class AB1 Ampifier
[CCS]
Plate Voltage ................................. 2500 V
Grid No. 2 Voltage ............................ 750 V
Grid No. 1 Voltage ............................ -130 V
Peak Grid No. 1 Voltage........................ 260 V
Grid No. 1 Current ............................ 0 mA
Plate Current (Zero Signal) ................... 190 mA
Plate Current (Maximum Signal) ................ 635 mA
Grid No. 2 Current (Zero Signal) .............. 0 mA
Grid No. 2 Current (Maximum Signal) ........... 28 mA
Driving Power ................................. 0 W
Load Resistance ............................... 6800 Ù
Power Output (approx) ......................... 850 W
Push Pull Class AB1 Ampifier
[CCS]
Plate Voltage ................................. 3000 V
Grid No. 2 Voltage ............................ 750 V
Grid No. 1 Voltage ............................ -137 V
Peak Grid No. 1 Voltage........................ 274 V
Grid No. 1 Current ............................ 0 mA
Plate Current (Zero Signal) ................... 160 mA
Plate Current (Maximum Signal) ................ 635 mA
Grid No. 2 Current (Zero Signal) .............. 0 mA
Grid No. 2 Current (Maximum Signal) ........... 26 mA
Driving Power ................................. 0 W
Load Resistance ............................... 8900 Ù
Power Output (approx) ......................... 1110 W
Push Pull Class AB1 Ampifier
[CCS]
Plate Voltage ................................. 3500 V
Grid No. 2 Voltage ............................ 750 V
Grid No. 1 Voltage ............................ -145 V
Peak Grid No. 1 Voltage........................ 290 V
Grid No. 1 Current ............................ 0 mA
Plate Current (Zero Signal) ................... 140 mA
Plate Current (Maximum Signal) ................ 610 mA
Grid No. 2 Current (Zero Signal) .............. 0 mA
Grid No. 2 Current (Maximum Signal) ........... 32 mA
Driving Power ................................. 0 W
Load Resistance ............................... 11.5K Ù
Power Output (approx) ......................... 1330 W
Push Pull Class AB1 Ampifier
[CCS]
Plate Voltage ................................. 4000 V
Grid No. 2 Voltage ............................ 750 V
Grid No. 1 Voltage ............................ -150 V
Peak Grid No. 1 Voltage........................ 300 V
Grid No. 1 Current ............................ 0 mA
Plate Current (Zero Signal) ................... 120 mA
Plate Current (Maximum Signal) ................ 585 mA
Grid No. 2 Current (Zero Signal) .............. 0 mA
Grid No. 2 Current (Maximum Signal) ........... 40 mA
Driving Power ................................. 0 W
Load Resistance ............................... 14.5K Ù
Power Output (approx) ......................... 1540 W
Push Pull Class AB2 Ampifier
[CCS]
Plate Voltage ................................. 2500 V
Grid No. 2 Voltage ............................ 500 V
Grid No. 1 Voltage ............................ -75 V
Peak Grid No. 1 Voltage........................ 266 V
Plate Current (Zero Signal) ................... 190 mA
Plate Current (Maximum Signal) ................ 700 mA
Grid No. 2 Current (Zero Signal) .............. 0 mA
Grid No. 2 Current (Maximum Signal) ........... 50 mA
Driving Power ................................. 4.3 W
Load Resistance ............................... 7200 Ù
Power Output (approx) ......................... 1110 W
Push Pull Class AB2 Ampifier
[CCS]
Plate Voltage ................................. 3000 V
Grid No. 2 Voltage ............................ 500 V
Grid No. 1 Voltage ............................ -80 V
Peak Grid No. 1 Voltage........................ 280 V
Plate Current (Zero Signal) ................... 160 mA
Plate Current (Maximum Signal) ................ 700 mA
Grid No. 2 Current (Zero Signal) .............. 0 mA
Grid No. 2 Current (Maximum Signal) ........... 40 mA
Driving Power ................................. 4.5 W
Load Resistance ............................... 9100 Ù
Power Output (approx) ......................... 1375 W
Push Pull Class AB2 Ampifier
[CCS]
Plate Voltage ................................. 3500 V
Grid No. 2 Voltage ............................ 500 V
Grid No. 1 Voltage ............................ -85 V
Peak Grid No. 1 Voltage........................ 290 V
Plate Current (Zero Signal) ................... 140 mA
Plate Current (Maximum Signal) ................ 700 mA
Grid No. 2 Current (Zero Signal) .............. 0 mA
Grid No. 2 Current (Maximum Signal) ........... 38 mA
Driving Power ................................. 5.1 W
Load Resistance ............................... 10.8K Ù
Power Output (approx) ......................... 1650 W
Push Pull Class AB2 Ampifier
[CCS]
Plate Voltage ................................. 4000 V
Grid No. 2 Voltage ............................ 500 V
Grid No. 1 Voltage ............................ -90 V
Peak Grid No. 1 Voltage........................ 280 V
Plate Current (Zero Signal) ................... 120 mA
Plate Current (Maximum Signal) ................ 638 mA
Grid No. 2 Current (Zero Signal) .............. 0 mA
Grid No. 2 Current (Maximum Signal) ........... 32 mA
Driving Power ................................. 3.5 W
Load Resistance ............................... 14K Ù
Power Output (approx) ......................... 1750 W
Class C Amplifier/Class C
Modulated Amplifier (Plate)
Plate Voltage ................................. 4000 V
Grid No. 2 Voltage ............................ 300 V
Grid No. 1 Voltage ............................ -170 V
Grid No. 1 Current ............................ 10 mA
Plate Current ................................. 270 mA
Grid No. 2 Current ............. .............. 22.5 mA
Driving Power ................................. 10 W
Power Output (approx) ......................... 720 W
GG
Plate Voltage ................................. 2500 V
Grid No. 2 Voltage ............................ 0 V
Grid No. 1 Voltage ............................ 0 V
Grid No. 1 Current ............................ 100 mA
Plate Current (Zero Signal) ................... 80 mA
Plate Current (Maximum Signal) ................ 270 mA
Grid No. 2 Current ............. .............. 55 mA
Driving Power ................................. 88 W
Load Resistance ............................... 4.0K Ù
Power Output (approx) ......................... 325 W
Notes:
1. Screen
requires 350 Vpp AF for 100% plate modulation.
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