Nothing denotes the passage of time better than technology. We are all aware that if you need to put "2" and "2" together, and you can't figure it out, well, there's an app for that. Once upon a time...slide rules were king and somewhere after that a huge technological advance followed when someone suggested, "Hey! Why don't we bend the slide rule so the 2 ends touch?" The poor guy was probably labeled a heretic and forced to down a salad sprinkled with hemlock (sorry, vegans).
Eventually, someone agreed that this was a good idea and instead of looking like a total nerd before nerd was a word, you could more easily pocket a circular slide rule and not be snubbed by so many babes.
In the era of radio someone felt the need to come up with a calculator that could tell you how many speakers you could connect together before frying the whole system. Ladies and gentleman, I give you the Impedance Calculator>>>>
and here is the back...
This was no fly by night company. It has a long history and still exists today. The founder began building and selling radios at a young age and fell into problems in the great depression (when broke). He eventually paid of his debts and started the company again. Read the timeline from the current name of the company Dukane - here. Pretty interesting stuff.
That is cool. I dig this kind of stuff, but around here it just sits in boxes.
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