Retrotechtacular: Remembering Radio Shack P-Box Kits | Power Inductor Coil

According to this study, over the next five years the Coupled Inductor market will register a xx% CAGR in terms of revenue, the global market size will reach US$ xx million by 2024, from US$ xx million in 2019. In particular, this report presents the global market share (sales and revenue) of key companies in Coupled Inductor business, shared in Chapter 3.

I don’t think Radioshack was good at all for building an inventory of anything, even a small one. My experiences with the Rat Shack do begin around 1990 though. The “older oldtimers” make it sound like it may have been a whole lot better in the 70s. A soldering iron might have damaged my mother’s womb so… I guess that was out for me.

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In follow-up emails, Lee noted, “Bott and Duffin recognized that Wang's methods constituted an algebra. They formalized it and started publishing on it around 1959.” Bob Ross also wrote me,

I also find GNU Units is an invaluable tool for engineering calculations: a scientific calculator that keeps track of, and converts, units.

The initial costs of an amorphous core transformer are higher than of a crystalline silicon steel core transformer: first, the amorphous material itself is more expensive than crystalline silicon steel and second, the saturation magnetic flux density of amorphous steel is lower than that of silicon steel. This means larger sizes of amorphous core transformers are required, which results in a higher cost per unit. However, the higher initial costs can be compensated by lower operating costs over the lifetime of the transformers due to their increased energy efficiency.

Inventor(s): Brahmananda R. Vempati (Dallas, TX), Harisha M. Negalaguli (Richardson, TX), Krishnakant M. Patel (Richardson, TX) Assignee(s): KODIAK NETWORKS, INC. (Plano, TX) Law Firm: No Counsel Application No., Date, Speed: 15435037 on 02/16/2017 (691 days app to issue)

They were also available. Heathkit, for example, had great kits with amazing manuals. Sure, they cost more, but they generally looked like something you bought ready-made if you built it right. On the other hand, the cheapest shortwave receiver in a 1976 Heathkit catalog was nearly $70. Sure, it looked like a real radio and probably performed better, too. But $70? Might as well have been a million for the kids buying P-Box kits.

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Modern wireless chargers for smartphones use inductive charging to transfer energy between the charging pad and a mobile device. A loop of coiled wires sits inside the charging pad with a magnet in the center. As electric current passes through these wires, it creates an electromagnetic field around the magnet. That field can then transfer energy to a nearby receiver coil that's found in smartphones and other mobile devices that support wireless charging.

Northland Power, which started up a natural gas generation in Thorold in 2010, is one of a diverse number of gas-power producers. At its location next to the Welland Canal, south of St. Catharines, it produces 285MW of power for the Ontario grid.

One thing I absolutely miss about the loss of Radio Shack, even in this day of Internet ordering, is if I find myself short of some small, cheap component, I could run down to the store and have a good chance of getting some same-day, with no extra shipping charges.