Statements (17)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
audio oscillator
|
| gptkbp:application |
audio testing
film sound production |
| gptkbp:frequency |
20 Hz to 20 kHz
|
| gptkbp:historicalSignificance |
helped launch HP as a company
|
| https://www.w3.org/2000/01/rdf-schema#label |
HP200A audio oscillator
|
| gptkbp:introducedIn |
1939
|
| gptkbp:inventedBy |
gptkb:Bill_Hewlett
|
| gptkbp:manufacturer |
gptkb:Hewlett-Packard
|
| gptkbp:marketedAs |
HP Model 200A
|
| gptkbp:notableFeature |
light bulb for amplitude stabilization
|
| gptkbp:notableFor |
first product of Hewlett-Packard
|
| gptkbp:powerSource |
AC mains
|
| gptkbp:technology |
gptkb:Wien_bridge_oscillator
|
| gptkbp:usedBy |
gptkb:Walt_Disney_Studios
|
| gptkbp:bfsParent |
gptkb:Wien_bridge_oscillator
|
| gptkbp:bfsLayer |
7
|