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History
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Examples of low power triodes from 1918 (left) to miniature tubes of the 1960s (right)
Examples of low power triodes from 1918 (left) to miniature tubes of the 1960s (right)
ECC83, a dual triode used in 1960-era audio equipment
ECC83, a dual triode used in 1960-era audio equipment
3CX1500A7, a modern 1.5 kW power triode used in radio trans­mitters. The cylindrical structure is a heat sink atta­ched to the plate, through which ai
3CX1500A7, a modern 1.5 kW power triode used in radio trans­mitters. The cylindrical structure is a heat sink atta­ched to the plate, through which air is blown during operation.
De Forest Audion tube from 1908, the first triode. The flat plate is visible on the top, with the zigzag wire grid under it. The filament was original
De Forest Audion tube from 1908, the first triode. The flat plate is visible on the top, with the zigzag wire grid under it. The filament was originally present under the grid but was burnt out.
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A McIntosh stereo audio amplifier with output power of 50 watts per channel used in home component audio systems in the 1970s.
A McIntosh stereo audio amplifier with output power of 50 watts per channel used in home component audio systems in the 1970s.
De Forest's prototype audio amplifier of 1914. The Audion (triode) vacuum tube had a voltage gain of about 5, providing a total gain of approximately
De Forest's prototype audio amplifier of 1914. The Audion (triode) vacuum tube had a voltage gain of about 5, providing a total gain of approximately 125 for this three-stage amplifier.
Power amplifier by Skyworks Solutions in a Smartphone.
Power amplifier by Skyworks Solutions in a Smartphone.
An LM741 general purpose op-amp
An LM741 general purpose op-amp