Statements (51)
| Predicate | Object |
|---|---|
| gptkbp:instance_of |
gptkb:computer
|
| gptkbp:first_introduced |
1904
|
| gptkbp:has_applications_in |
signal modulation
power amplification oscillation generation |
| gptkbp:has_component |
anode
cathode control grid |
| gptkbp:has_function |
rectification
signal amplification |
| gptkbp:has_limitations |
power consumption
size heat generation fragility |
| gptkbp:has_type |
gptkb:vacuum_cleaner
|
| https://www.w3.org/2000/01/rdf-schema#label |
Thermionic valve
|
| gptkbp:invention |
gptkb:John_Ambrose_Fleming
|
| gptkbp:is_available_in |
various sizes
various types |
| gptkbp:is_considered_as |
obsolete technology
|
| gptkbp:is_found_in |
television sets
musical instrument amplifiers old radios |
| gptkbp:is_part_of |
electronic circuits
|
| gptkbp:is_related_to |
gptkb:LED
pentode tetrode triode |
| gptkbp:is_tested_for |
multimeter
valve tester |
| gptkbp:is_used_in |
gptkb:sports_equipment
gptkb:computer gptkb:scientific_instruments gptkb:scientific_research audio processing military applications signal processing high-frequency applications high-end audio equipment broadcasting equipment musical amplifiers vintage electronics spacecraft electronics |
| gptkbp:manufacturer |
various companies
|
| gptkbp:operates |
thermionic emission
|
| gptkbp:replaced_by |
gptkb:Transistor
solid-state devices |
| gptkbp:used_in |
audio amplifiers
radio transmitters |
| gptkbp:bfsParent |
gptkb:John_Ambrose_Fleming
|
| gptkbp:bfsLayer |
4
|