Quoted paper:
The military standardized on 50 ohm impedance and
spent vast sums of money developing cables and connectors
"Vast sums?" I'm sure they thought that at the time, but by today's standards I'm sure it would seem insignificant. And it actually had a relatively meaningful impact, unlike many other projects.
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Radio is your best entertainment value.
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Mein Ohr ganz nah am Weltempfänger...