L-3 Corporation

Products > Traveling Wave Tubes - High Power

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Prime Power Considerations
Product # Cathode Volt. kV Cathode Cur. Amps Grid Drive Volt. V Grid Bias Volt. V Grid Cur. mA Heater Volt. V Heater Cur. Amps 1st Stage Col.Cur. kV 1st Stage Col. Cur. Amps 2nd Stage Col. Volt. kV 2nd Stage Col. Cur. Amps
L-4920 40 14 1,300 -750 25.0 28 4 -12 12 -5 2
L-4922 40 13 1,250 -750 10.0 28 4 0 12.8 N/A N/A
L-4923 42 14 1,200 -750 14.0 28 4 -9 10 -3 4
L-4950 40 12 1,200 -750 10.0 28 4 0 11.8 N/A N/A
L-4966 40 14.5 1,400 -750 14.0 28 4 0 14.3 N/A N/A
L-4995 40 15 1,300 -750 14.0 28 4 0 14.8 N/A N/A
Electron Beam Focusing
Product # Method Solenoid Volt. V Solenoid Cur. Amps Slenoid Resistance Ohms Max Prime Power Watts Max DC Intercept Cur. mA Max RF Intercept Cur. mA Coolant
L-4920 INTEGRAL 72 13 5 1200.0 250 1250 WATER
L-4922 INTEGRAL 80 13 4.5 1100.0 200 400 WATER
L-4923 EXTERNAL 20 20 N/A 500.0 100 200 WATER
L-4950 INTEGRAL 50 13 5 1000.0 200 500 WATER
L-4966 INTEGRAL 80 13 4.5 1100.0 100 150 WATER
L-4995 INTEGRAL 80 13 4.5 1100.0 100 350 WATER
ExtendedRF Parameters
Product # Small Signal Gain dB AM Noise dB PM Noise dB Noise Poer Output dBm/MHz 2nd Harm. dBc Insertion Loss dB Max RF Intercept Cur. mA Coolant
L-4920 40 -80 -80 -107 -26 90.0 2000 25
L-4922 40 -80 -80 -107 -26 90.0 70 5
L-4923 40 -80 -80 -107 -26 90.0 2000 2
L-4950 40 -80 -80 -107 -26 90.0 500 2
L-4966 40 -80 -80 -107 -26 90.0 70 5
L-4995 40 -80 -80 -107 -26 90.0 300 10
Physical Description
Product # RF Input Con. RF Output Conf. Overall Length inches Body Diameter inches Weightlbs RF Output Press. psia Coolant con.
L-4920 SC 3-1/8 Coax 140 12 350 15 Quick Disconnect
L-4922 N WR650 76 10 240 20 Quick Disconnect
L-4923 N WR650 -Half Height 68 9 110 15 Quick Disconnect
L-4950 N WR284 55 10 120 20 Quick Disconnect
L-4966 SC WR650 76 10 240 25 Quick Disconnect
L-4995 SC WR975-Half Height 76 10 235 25 Quick Disconnect
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Design Notes:
1. All tubes are control grid modulated and also incorporate a shadow grid to assist in the suppression of grid emission and grid intercept current.
2. All L-3 Electron Devices' TWTs are inherently capable of dual-stage collector depression should it be necessary to fulfill a particular system requirement.
3. A mod anode connection is provided on all TWTs and may be utilized to accommodate system sensing circuits and also reduce the potential damage incurrred by cathode-to-anode high-voltage arcs. This protection is accomplished through the incorporation of an external anode-to-ground resistance of two kilohms.
4. All cathode and collector voltages are referenced to ground.

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