GENERAL DESCRIPTION
NEC LD7215W is a PPM-focused traveling wave tube designed for use as final amplifier in the earth-to-satellite communications transmitter.
This is capable of delivering an output power of 3 kW over the range of 5.85 to 6.65 GHz.
It provides a high power gain of 42 dB at a rated output power.
Furthermore, this is of rugged and reliable design offering long-life service.

FEATURES
● High Power Gain
    The power gain is typically 42 dB minimum at 3 kW level.
● Simple Cooling System
    The tube is forced-air-cooled, so that the cooling systems are simplified.
● PPM Focusing
    The tube is PPM (Periodic Permanent Magnet) -focused, eliminating entirely the focusing power supplies and interlock circuits.
● Rugged Construction
    The tube is designed to be rugged, therefore it is suitable for transportable systems.
● Long Life and High Stability
    The tube employs an advanced impregnated cathode with a low operating temperature for long life.
● Microdischarge Free
    The tube is carefully designed to be free from microdischarge in the electron gun for long term operation, therefore it is suitable for digital communication service.