Similarly, there are still dedicated RF applications still in use Or a slightly faster exotic fare, such as klystron. In industrial applications, vacuum equipment is still closely related to us, although in many cases, their semiconductor devices will be tightly broken.įor example, high-power RF amplifiers for UHF and higher frequencies still use vacuum tubes because they There are so many steel pipe brands on the market, where are they manufactured, and how have their manufacturers survived for so long? The answer is relatively simple, but in other respects it is a maze of complexity.Īlthough the vacuum tubes of decades ago may have disappeared from ordinary electronic products, it is worth pointing out that many old names in the vacuum tube industry did not stop manufacturing vacuum tubes, but just stopped manufacturing vacuum tubes that you may be familiar with. However, this does raise an interesting question. Various brands of electronic tubes can be purchased at dizzying prices, which is a pleasant surprise for a technology that may be thought to have disappeared 40 years ago. High-end high-fidelity stores are full of tube-based devices, and electronic enthusiasts can also use a large number of tube amplifier kits. In particular, the audio world has begun to chase the elusive "tube sound", whether it's a deliberately overdriven amplifier for guitarists or a perfect amplifier for audiophiles. If you made a tube amplifier in the early 1990s, it would be a big anomaly.Īs the composition of our consumer electronics products becomes more and more digital, there is growing interest in analog devices, or at least devices with obvious analog components. Consumer products no longer contain these products, and an entire generation of engineers has never worked with them. As cheaper, more general-purpose semiconductors replaced them, they faded from the electronic parts catalog, and the industry that once produced them in such quantities disappeared in favor of factories that produced new devices. Until the 1960s, these electrodes were ubiquitous in consumer electronics and even popular in some mass market applications. The electrical properties of a group of electrodes in a vacuum glass enclosure depend on the modulation of the electron flow through them. Instead, a very different type of electronic component dominates the vacuum tube. However, in the first sixty years or so of the current field, these devices have either not been invented or are in the early stages of development, so that they are not cost-effective or widely used. Transistors, integrated circuits, microcontrollers. For most of us, electronic technology takes the form of solid-state devices.
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