Hewlett-Packard 400D
1954 - Voltmeter
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Hewlett-Packard 400D
1954
- Voltmeter
The Hewlett-Packard 400D is a vacuum tube voltmeter, portable, of great sensitivity and stability, which can be used in the laboratory or in field.
It is used to measure the power difference between two points in an electrical circuit.
8 valves: 6CB6 6CB6 6CB6 6CB6 6CB6 6AX5 12B4A 6U8 5651
In 1939 Stanford Bill Hewlett and Dave Packard founded the company HP, Hewlett-Packard, Palo Alto, CA (USA).
HP's first product was the 200A audio oscillator and Walt Disney Studios was one of the first customers.
During the 1960s, it will have taken its first steps in the area of computing, which has been consolidating, becoming a benchmark in the history of information technologies.
It is used to measure the power difference between two points in an electrical circuit.
8 valves: 6CB6 6CB6 6CB6 6CB6 6CB6 6AX5 12B4A 6U8 5651
In 1939 Stanford Bill Hewlett and Dave Packard founded the company HP, Hewlett-Packard, Palo Alto, CA (USA).
HP's first product was the 200A audio oscillator and Walt Disney Studios was one of the first customers.
During the 1960s, it will have taken its first steps in the area of computing, which has been consolidating, becoming a benchmark in the history of information technologies.
Also in 1954
- 29 of September - The convention establishing CERN (the European Organization for Nuclear Research) is signed.
- 23 of February - The first mass inoculation of children against polio with the Salk vaccine begins in Pittsburgh.
- 19 of March - Joey Giardello knocks out Willie Tory in round seven at Madison Square Garden in the first televised prize boxing fight shown in colour.
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