High Power Helix Traveling Wave Tubes (TWTs)

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	Weight lbs	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

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.

For more information - contact us
(Williamsport, PA)