Transmitting Tube Hot Cathode Characteristics
| Material | Operating temperature | Emission efficacy | Specific emission |
|---|---|---|---|
| Tungsten | 2500 K | 5 mA/W | 500 mA/cm2 |
| Thoriated tungsten | 2000 K | 100 mA/W | 5 A/cm2 |
| Oxide coated | 1100 K | 500 mA/W | 10 A/cm2 |
| Barium aluminate | 1300 K | 400 mA/W | 4 A/cm2 |
Read more about this topic: Hot Cathode
Famous quotes containing the words transmitting, tube and/or hot:
“Anyone who has obeyed nature by transmitting a piece of gossip experiences the explosive relief that accompanies the satisfying of a primary need.”
—Primo Levi (1919–1987)
“The last best hope of earth, two trillion dollars in debt, is spinning out of control, and all we can do is stare at a flickering cathode-ray tube as Ollie “answers” questions on TV while the press, resolutely irrelevant as ever, asks politicians if they have committed adultery. From V-J Day 1945 to this has been, my fellow countrymen, a perfect nightmare.”
—Gore Vidal (b. 1925)
“Deacon King was tried for violating the Sabbath, and so hot was the debate that it was referred to the church council, which ultimately decided, after long and grave debate, that the deacon had committed a ‘work of necessity and mercy.’”
—For the State of Massachusetts, U.S. public relief program (1935-1943)