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- vacuum tubes require a red hot cathode or filament to supply the electrons by which they operate. This cathode or filament dissipates much more power than an entire transistor and contributes nothing but electrons to the operation of the tube.
- transistors are solid state and not sensitive to the vibrations that can cause "microphonic" behavior in tubes.
- tubes need to be manufactured one at a time, even on an automated assembly line, modern planar transistors can be produced in practically unlimited quantities in one processing cycle all at the same time, giving the transistors made at the same time nearly all perfectly matched electronic characteristics.
- vacuum tubes need hard vacuum, transistors don't.
- the life of a vacuum tube is most frequently limited by how long it takes the heater or filament to burn out (like a light bulb) this is usually limited to a few years at most, the life of a transistor is most frequently limited by "dopant migration" which is temperature dependent, at normal operating temperatures within the manufacturer's specifications this can easily be centuries!
- vacuum tube charge carriers are always negatively charged electrons, transistor charge carriers can be either negatively charged electrons or positively charged holes making construction of "complementary" circuits possible which often significantly reduce needed part count.
- etc.
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How did colossus work without transistors?
There were vacuum tubes before transistors
Why were the vacuum tubes used instead of transistors in early computers?
Early transistors were much slower and far more expensive than vacuum tubes. Also computers built before 1948 there were no transistors to use at all.
What replaced vacuum tubes in the computer?
Integrated circuits (in many microprocessor integrated circuits) containing many billions of transistors each.
What roles has vacuum tubes played in computer development?
vacuum tubes are the switching components in the first generation computers to process data. later they were replaced by transistors.
Are there home theater systems available that use vacuum tubes instead of transistors?
yes, and vac tubes are the most efficient
How did colossus work without transistors?
There were vacuum tubes before transistors
What do you call the vacuum tubes used in transistor radios?
You don't, there aren't any. However some radios in the early 1950s did use both vacuum tubes and transistors. This was because early junction transistors were too slow to operate at RF so vacuum tubes were used in the RF and IF sections. These radios were called hybrid radios because they used both vacuum tubes and transistors.
Transistors replaced to amplify electric signals?
vacuum tubes
What technology replaced vacuum tubes in the second generation?
Vacuum tubes were first replaced by transistors, and later by integrated circuits.
Why were the vacuum tubes used instead of transistors in early computers?
Early transistors were much slower and far more expensive than vacuum tubes. Also computers built before 1948 there were no transistors to use at all.
What are vacuum tubes and transistors?
They are devices that are used to control the flow of current.
What are the advantages oe transistors over vacuum tubes?
6u76yu
What are the different components?
Transistors,diode,vacume tubes and amplifiers
What replaced vacuum tubes in the computer?
Integrated circuits (in many microprocessor integrated circuits) containing many billions of transistors each.
What roles has vacuum tubes played in computer development?
vacuum tubes are the switching components in the first generation computers to process data. later they were replaced by transistors.
Are there home theater systems available that use vacuum tubes instead of transistors?
yes, and vac tubes are the most efficient
What was the first computer consisted of?
Mostly vacuum tubes, in place of today's more modern transistors.
