3

LD7261

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

Unit

Frequency ……………………………………………

20.0

GHz

Output Power ………………………………………

250

W

Heater Voltage (Note 4) ……………………………

6.3

V

Heater Current ………………………………………

1.42

A

Helix Voltage

………………………………………

10.6

kV

Helix Current

………………………………………

0.7

mA

Anode Voltage ………………………………………

8.6

kV

Anode Current ………………………………………

0.01

mA

Collector Voltage ……………………………………

5.0

kV

Collector Current ……………………………………

264

mA

Cathode Current ……………………………………

265

mA

Power Gain

at 25 W ………………………

49

dB

at 250 W ………………………

46

dB

Gain Variation

at 25 W ………………………

5

dB

Gain Slope

at 25 W ………………………

0.012

dB/MHz

AM-PM Conversion

at 25 W ………………………

1.5

deg./dB

at 250 W ………………………

6.0

deg./dB

3rd Order Intermodulation ………………………

–30

dBc

(two equal carries, 25 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.