3

LD7235 SERIES

TYPICAL OPERATION (Note 2, 3, 4 and 5)

Unit

Frequency ……………………………………………

30.0

GHz

Output Power ………………………………………

150

W

Heater Voltage (Note 4)

…………………………

6.3

V

Heater Current ………………………………………

1.05

A

Helix Voltage

………………………………………

12.6

kV

Helix Current

………………………………………

0.5

mA

5 Isolated Anode Type

Anode Voltage ………………………………………

9.4

kV

Anode Current ………………………………………

0.01

mA

5 Single Collector Type

Collector Voltage ……………………………………

4.6

kV

Collector Current ……………………………………

109

mA

5 Dual-stage Collector Type

Collector Voltage-1 …………………………………

4.6

kV

Collector Current-1 …………………………………

51

mA

Collector Voltage-2 …………………………………

2.3

kV

Collector Current-2 …………………………………

58

mA

Cathode Current ……………………………………

110

mA

Power Gain

at 20 W ………………………

57

dB

at 150 W ………………………

51

dB

Gain Variation

at 20 W ………………………

0.15

dB/60MHz

Gain Slope

at 20 W ………………………

0.005

dB/MHz

AM-PM Conversion

at 20 W ………………………

1.2

deg./dB

at 150 W ………………………

2.0

deg./dB

3rd Order Intermodulation ………………………

–28.5

dBc

(two equal carriers, 20 W total)

Note 1 : Absolute rating should not be exceeded under continuous or transient conditions. A single absolute

rating may be the limitation and simultaneous operation at more than one absolute rating may not

be possible.

Note 2 : The tube body is at ground potential in operation.

Note 3 : All voltages are referred to the cathode potential except the heater voltage.

Note 4 : The optimum operating parameters are shown on a test performance sheet for each tube.

Note 5 : These characteristics and operating values may be changed as a result of additional information or

product improvement. NEC should be consulted before using this information for equipment

design. This data sheet should not be referred to a contractual specification.