2

LD7249 SERIES

DATA SHEET ET0221EJ5V0DS00

GENERAL CHARACTERISTICS

ELECTRICAL

Frequency ……………………………………………… 13.75 to 14.5 GHz

Output Power

LD7249 ……………………………………………… 350 W

LD7249U …………………………………………… 400 W

Heater Voltage ………………………………………… 6.3 V

Heater Current ………………………………………… 1.2 A

Type of Cathode ……………………………………… Indirectly heated, Impregnated

Cathode Warm-up Time

…………………………… 180 s

MECHANICAL

Dimensions …………………………………………… See outline

Weight ………………………………………………… 4 kg approx.

Focusing

……………………………………………… Periodic Permanent Magnet

Mounting Position …………………………………… Any

Electrical Connections ……………………………… Flying Leads

Heater, Heater-Cathode,

(Optionally, the HV lead out let position can be changeable)

Helix, Collector-1, Collector-2

and Thermal Protection

RF Connections

Input ………………………………………………… Type SMA Female

Output ……………………………………………… Mates with UBR-120 Flange, Waveguide : WR-75

Cooling ………………………………………………… Conduction

ABSOLUTE RATINGS (Note 1, 2 and 3 )

ELECTRICAL

min.

max.

Unit

Heater Voltage ………………………………………

6.0

6.6

V

Heater Surge Current

……………………………

–

3.0

A

Heater Current ………………………………………

1.0

2.0

A

Heater Warm-up Time ……………………………

180

–

s

Helix Voltage

………………………………………

8.0

9.2

kV

Helix Current

………………………………………

0

10

mA

Collector-1 Voltage …………………………………

4.0

4.6

kV

Collector-1 Current …………………………………

–

180

mA

Collector-2 Voltage …………………………………

2.3

3.1

kV

Collector-2 Current …………………………………

–

290

mA

Cathode Current ……………………………………

200

290

mA

RF Drive Power ……………………………………

–

5

mW

Load VSWR …………………………………………

–

1.5 : 1

MECHANICAL

Min.

Max.

Unit

Heat Sink Temperature ……………………………

–40

+115

°C

ENVIRONMENTAL

Min.

Max.

Unit

Ambient Temperature

Storage ……………………………………………

–50

+90

˚C

Operating …………………………………………

–40

+100

˚C