2

LD7235 SERIES

GENERAL CHARACTERISTICS

ELECTRICAL

Frequency ……………………………………………… 26.5 to 28.6 GHz

27.5 to 30.0 GHz

30.0 to 31.3 GHz

Output Power ………………………………………… 150 W

Heater Voltage ………………………………………… 6.3 V

Heater Current ………………………………………… 1.05 A

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

Cathode Warm-up Time

…………………………… 300 s

MECHANICAL

Dimensions …………………………………………… See Outline

Weight ………………………………………………… 3.5 kg approx.

Focusing

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

Mounting Position …………………………………… Any

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

RF Connections

Input ………………………………………………… Mates with UG-599/U Flange

Output ……………………………………………… Mates with UG-599/U Flange

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

ABSOLUTE RATINGS (Note 1, 2 and 3 )

ELECTRICAL

Min.

Max.

Unit

Heater Voltage ………………………………………

6.0

6.6

V

Heater Surge Current

……………………………

–

1.6

A

Heater Current ………………………………………

–

1.5

A

Heater Warm-up Time ……………………………

300

–

s

Helix Voltage

………………………………………

12.0

13.0

kV

Helix Current

………………………………………

–

3.0

mA

5 Isolated Anode Type

Anode Voltage ………………………………………

0

11.0

kV

Anode Current ………………………………………

0

1.0

mA

5 Single Collector Type

Collector Voltage ……………………………………

4.0

6.0

kV

Collector Current ……………………………………

–

140

mA

5 Dual-stage Collector Type

Collector Voltage-1 …………………………………

4.0

6.0

kV

Collector Current-1 …………………………………

–

80

mA

Collector Voltage-2 …………………………………

2.0

3.0

kV

Collector Current-2 …………………………………

–

140

mA

Cathode Current ……………………………………

–

140

mA

RF Drive Power ……………………………………

–

3.0

mW

Load VSWR …………………………………………

–

1.25 : 1

–

ENVIRONMENTAL

Min.

Max.

Unit

Heat Sink Temperature ……………………………

–15

+110

˚C

Ambient Temperature

Storage ………………………………………………

–55

+100

˚C

Operation ……………………………………………

–30

+75

˚C