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7 hours ago · where \(R_s\) is the series resistance of the coil, while its steady state value is given by \(V_{L}/(2\pi f_0 L)\).However, for portable applications, high-voltage circuitry becomes impractical due to unavailability of high-voltage power supplies, the requirement for higher-rated components that are larger in size, and larger printed-circuit board (PCB) designs due to the need to maintain ...
1 day ago · A Sony TR-730 transistor radio made in Japan, c. 1960. Despite some successes, the company faced continued struggles in the mid- to late-2000s. In 2012, Kazuo Hirai was promoted to president and CEO, replacing Stringer. Shortly thereafter, Hirai outlined his company-wide initiative, named "One Sony" to revive Sony from years of financial losses ...
My radio unexpectedly began blowing the fuse in the power cable. Despite verifying perfect SWR with my antenna analyzer, I've tried swapping power cables, replacing the fuse, switching mics, and testing with a different power supply.
7 hours ago · Since the 1950s the cost of a transistor has fallen by about a factor of 300 million. In 1954 the first transistor radio had 4 transistors which cost $2.50 apiece ($29.03 in 2024 dollars). Today, an AMD Ryzen processor with 9.9 billion transistors is on sale for $650, or about $0.000000066 per transistor.
7 hours ago · Deep Dive into RFICs (Radio Frequency Integrated Circuits) Building upon the foundational explanation, let's delve deeper into the technical specifics of RFICs: Architecture and Building Blocks: * Functional Blocks: An RFIC is typically comprised of several functional blocks cascaded together to achieve the desired signal processing. These blocks can be broadly
1 day ago · This was quite in order given that parts were large and unwieldy, but come the advent of smaller components, the transistor and then integrated circuits in the 1970s, a new concept of ‘solderless breadboards’ was born.
7 hours ago · Since the 1950s the cost of a transistor has fallen by about a factor of 300 million. The cost of a semiconductor fab has increased from about $31 million in 2024 dollars to 10-$20 billion or more today. That’s around 300 to 600 times as expensive. A current microchip has features around 50 nanometers (billionths of a meter) wide.
