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Where did hobbyists get electronics before 1921?
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Where did hobbyists get electronics before 1921?

by chuckz on Sun Nov 02, 2014 12:33 pm

I was looking at a home made electric motor made by my Father made out of wood, metal and wire.

Where did hobbyists get their electronic parts before 1921 or 1892?

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Re: Where did hobbyists get electronics before 1921?

by chuckz on Sun Nov 02, 2014 12:35 pm

P2220519.JPG
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The middle is actually a nail if you had not noticed.

I always looked at the parts as a piece of junk but the engineering is more important than looks.

I wondered where people got their parts before Radio Shack, General Electric and RCA.

Photo (C) Chuck

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Re: Where did hobbyists get electronics before 1921?

by adafruit_support_bill on Sun Nov 02, 2014 12:49 pm

Reminds me of my early motor experiments. Thanks for posting!

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Re: Where did hobbyists get electronics before 1921?

by adafruit_support_mike on Sun Nov 02, 2014 4:11 pm

Go to Google Books and look for books about electronics between about 1880 and 1930. There are whole chapters on building your own electric motor, coating bare wire with paraffin for insulation, winding your own rheostats, etc.

What they couldn't buy, they made:

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transformer.jpg
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Re: Where did hobbyists get electronics before 1921?

by chuckz on Mon Nov 03, 2014 2:27 am

I always heard people got their start in electronics from Radio or science and this is what I found:

The rectifying property of crystals was discovered in 1874 by Karl Ferdinand Braun,[5][6][7] and crystal detectors were developed and applied to radio receivers in 1904 by Jagadish Chandra Bose,[8][9]


http://en.wikipedia.org/wiki/Crystal_radio

Another user suggested Allied which was Allied Radio and there are conflicting dates for them in the United States and they may have been around longer than Radio Shack.

I just supposed that people bought and played around with Vacuum tubes from General Electric or RCA.

There is a lot more investigating to do to find out the possible answers.


Information Age: The radio transmitter that changed our world

https://www.youtube.com/watch?v=eKQwnB6 ... 43&index=4

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Re: Where did hobbyists get electronics before 1921?

by chuckz on Mon Nov 03, 2014 3:02 am

We owe a lot to Thomas Edison (and others). My neighbor tried to convey to me a little about radio. Old radios were made up of vacuum tubes. What are vacuum tubes and where did we get them? Most people forget or take for granted that the light bulb was one of the earliest vacuum tubes. And who popularized the vacuum tube?

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Re: Where did hobbyists get electronics before 1921?

by Speedwell on Mon Nov 03, 2014 11:32 pm

Back in engineering school, the admissions office had old senior projects on display. It seems a that century ago, building a motor, relay or vacuum tube was sufficiently difficult to display mastery of the EE curriculum.

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Re: Where did hobbyists get electronics before 1921?

by jimblue on Fri Nov 28, 2014 12:32 pm

Many early hobbyists made their own vacuum tubes back then. Glass blowing, wire forming, and a pump to make a vacuum inside the tube. Amateur, ham, radios back then would have been spark gap transmitters. High voltage, large size equipment, very large transmitted signal. Like using a lightning bolt to send Morse code. No, I'm not that old, just read about it.

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Please be positive and constructive with your questions and comments.