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KeithSchaub
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A rap for G. Marconi
KeithSchaub   10/10/2013 4:35:56 PM
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I used AutoRap, by Smule (iphone apps) to make this. Simply read the first paragraph of the article. Software did the rest!

Good marketing tool, and a little humorous to boot. 

http://khush.smule.com/autorap_52570d1f1321f&v2

antedeluvian
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I enjoyed it
antedeluvian   10/10/2013 4:24:49 PM
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Thanks for the blog. I really enjoyed it. The vast majority of the books that I read are on scientific/engineering history and this was definitely in the same vein. More please!

zeeglen
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wireless magic
zeeglen   10/9/2013 10:38:21 PM
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Great story!  The ease of today's worldwide connectivity is taken for granted by most who use these everyday services, the result of much intensive engineering effort by many.

But I still remember back in the 60's when my ham radio licence finally arrived in the mail, and my first Morse code CQ on 40 meters from my home-brewed transmitter raised a QSO from Michigan.  That was a real thrill, a home-built radio apparatus that could send electromagnetic waves all over the world.

junko.yoshida
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Re: Compare this with wireless charging
junko.yoshida   10/9/2013 8:01:09 PM
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It is a cool story. I love reading about history. I asked the author Keith where he got this idea of writing about Marconi.

He wrote back to me:

A few years ago at NI Week one of the presenters told the Dr Crippen story. It fascinated the audience. I meant to write about it then but just got busy and forgot but always remembered the story. 

Finally I had time and started researching it last week. Turns out there have been a few movies and documentaries about the Dr Crippen story and a book, Thunderstruck, written a few years ago. I read the book, and other articles and websites, and it occurred to me to check to see if it was same radio on Titanic. It was, so I tied it all together. 

rick merritt
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Re: Compare this with wireless charging
rick merritt   10/9/2013 5:16:49 PM
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Cool stories!

rick merritt
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Re: Compare this with wireless charging
rick merritt   10/9/2013 5:16:46 PM
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Cool stories!

Bert22306
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Compare this with wireless charging
Bert22306   10/9/2013 4:21:36 PM
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Good story. Compared with wireless charging, which is very short range (in spite of Nikola Tesla's multiple experiments attempting otherwise), RF comms provided a service that no wired telegraphy could.

I'll grant the lack of a physical connector, which can be delicate, would be an advantage of wireless charging. But as much as the amount of wasted energy by all those wired chargers left plugged in today is being hyped, imagine how much more energy these wireless charges will waste.

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Radio
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As data rates begin to move beyond 25 Gbps channels, new problems arise. Getting to 50 Gbps channels might not be possible with the traditional NRZ (2-level) signaling. PAM4 lets data rates double with only a small increase in channel bandwidth by sending two bits per symbol. But, it brings new measurement and analysis problems. Signal integrity sage Ransom Stephens will explain how PAM4 differs from NRZ and what to expect in design, measurement, and signal analysis.

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