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4-400A
Radial Beam Power Tetrode

EIA Base & Outline

EIA Base: 5BK
Source ........................................ Eimac DS 1/55

Mechanical Data

Source ........................................ Eimac DS 1/55
Base Type ..................................... 5-Pin Metal Shell
Maximum Overall Height ........................ 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

Source ........................................ Eimac DS 1/55
Filament Voltage .............................. 5 V
Filament Current .............................. 14.5 A

Direct Interelectrode Capacitances (approx)

Tetrode
Source ........................................ Eimac DS 1/55
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]
Source ........................................ Eimac DS 1/55
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]
Source ........................................ Eimac DS 1/55
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]
Source ........................................ Eimac DS 1/55
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]
Source ........................................ Eimac DS 1/55
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 Ω
Bulb Temperature (At Hottest Point) ........... 200 °C

Characteristics and Typical Operation

Class C Amplifier/Oscillator below 75 MHz [CCS]
Source ........................................ Eimac DS 1/55
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]
Source ........................................ Eimac DS 1/55
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]
Source ........................................ Eimac DS 1/55
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]
Source ........................................ Eimac DS 1/55
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]
Source ........................................ Eimac DS 1/55
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]
Source ........................................ Eimac DS 1/55
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]
Source ........................................ Eimac DS 1/55
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]
Source ........................................ Eimac DS 1/55
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]
Source ........................................ Eimac DS 1/55
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]
Source ........................................ Eimac DS 1/55
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]
Source ........................................ Eimac DS 1/55
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]
Source ........................................ Eimac DS 1/55
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]
Source ........................................ Eimac DS 1/55
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 Ω
Power Output (approx) ......................... 850 W

Push Pull Class AB1 Ampifier [CCS]
Source ........................................ Eimac DS 1/55
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 Ω
Power Output (approx) ......................... 1110 W

Push Pull Class AB1 Ampifier [CCS]
Source ........................................ Eimac DS 1/55
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 Ω
Power Output (approx) ......................... 1330 W

Push Pull Class AB1 Ampifier [CCS]
Source ........................................ Eimac DS 1/55
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 Ω
Power Output (approx) ......................... 1540 W

Push Pull Class AB2 Ampifier [CCS]
Source ........................................ Eimac DS 1/55
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 Ω
Power Output (approx) ......................... 1110 W

Push Pull Class AB2 Ampifier [CCS]
Source ........................................ Eimac DS 1/55
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 Ω
Power Output (approx) ......................... 1375 W

Push Pull Class AB2 Ampifier [CCS]
Source ........................................ Eimac DS 1/55
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 Ω
Power Output (approx) ......................... 1650 W

Push Pull Class AB2 Ampifier [CCS]
Source ........................................ Eimac DS 1/55
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 Ω
Power Output (approx) ......................... 1750 W

Class C Amplifier/Class C Modulated Amplifier (Plate)
Source ........................................ Eimac DS 1/55
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
Source ........................................ Eimac DS 1/55
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 Ω
Power Output (approx) ......................... 325 W

Notes

Source ........................................ Eimac DS 1/55
1. Screen requires 350 Vpp AF for 100% plate modulation.

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Thu, 18 Aug 2022 00:07:40 -0700