Transistors performed functions similar to vacuum tubes but they were smaller, cheaper, and more reliable. Additionally, they consumed less power. The ability for transistors to replace vacuum tubes was first demonstrated in AT&T’s Bell Laboratories. Transistor-based computers could perform 200,000 to 250,000 calculations per second.
Transistors are also used in other electrical devices such as the radio. Below is a picture of a radio and transistors.
Figure 4 Transistors
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