3

LD7217 SERIES

TYPICAL OPERATION (Note 2, 3 and 6)

LD7217S

LD7217, LD7217W

Unit

Frequency ……………………………………………

5.85 to 6.425

5.85 to 6.425, 5.85 to 6.65

GHz

Output Power ………………………………………

600

700

W

Heater Voltage (Note 4) ……………………………

6.3

6.3

V

Heater Current ………………………………………

1.7

1.7

A

Helix Voltage …………………………………………

11.0

11.2

kV

Helix Current …………………………………………

6.0

3.0

mA

Anode Voltage ………………………………………

11.0

11.2

kV

Anode Current ………………………………………

0.3

0.1

mA

Collector Voltage ……………………………………

6.0

6.2

kV

Cathode Current ……………………………………

425

430

mA

Power Gain

…………………………………………

48 (at 60 W)

57 (at 70 W)

dB

45 (at 600 W)

54 (at 700 W)

dB

Gain Variation ………………………………………

1.5

1.0 (LD7217)

dB/ 575 MHz

1.8 (LD7217 W)

dB/800 MHz

Gain Slope ……………………………………………

0.01 (at 60 W)

0.015 (at 70 W)

dB/MHz

AM-PM Conversion …………………………………

1.5 (at 60 W)

1.5 (at 70 W)

deg./dB

3.5 (at 600 W)

3.5 (at 700 W)

deg./dB

3rd Order Intermodulation

(two equal carriers, 350 W total) …………………

–19

–19

dBc

Air Flow ………………………………………………

204

204

kg/hr

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 : The accelerating anode voltage should be at cathode potential for the off condition, and at helix for the

full cathode current condition. The accelerating voltage should not exceed the helix voltage by 250

volts.

Note 6 : 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.