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Author Topic: Teenager invents low-frequency radio for underground communications  (Read 2071 times)

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anarchir

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The Ramsey FM100B is a good deal. It sounds pretty good and is stable and clean. I built one for a friend and he used it for a couple years. He brought it for me to fix and I found a penny and a paper clip inside. I cleaned it up and it still works well. I did modify it with an external antenna port so we could run a small amp. It doesn't want to be driven hard.

The pcs-electronics CYBER MAX boxes are a good buy, too. They're modular so you can mix and match parts. They even have an RDS board you can pop in there. I modified one of those with a PL-259 connector and a cooling fan upgrade. They have several adjustments so you can just buy the boards you want, or a whole package.
The built in compressor might be OK for talk, but it was pathetic for music.

If you want REAL equipment, google: Broadcast Electronics, Harris, Collins, Armstrong, Marti (low-end), Crown, QEI (low-end)
REAL antennas are made by ERI, Scala, Cellwave, Harris,  Shively, Jampro("junkpro", Kathrein

http://www.engadget.com/2010/02/01/teenager-invents-low-frequency-radio-for-underground-communicati/

Teenager invents low-frequency radio for underground communications.
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anarchir

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Re: Teenager invents low-frequency radio for underground communications
« Reply #1 on: February 02, 2010, 02:18:31 AM »

Well I found it relevant.
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Sam Gunn (since nobody got Admiral Naismith)

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Re: Teenager invents low-frequency radio for underground communications
« Reply #2 on: February 02, 2010, 03:25:49 AM »

This is cool but how is it stickied?
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anarchir

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Re: Teenager invents low-frequency radio for underground communications
« Reply #3 on: February 02, 2010, 04:06:08 AM »

I posted this in another thread about radio broadcasting equipment and Ian transferred it here because he felt it was in the wrong area I guess. I didnt notice he stickied it, but that was probably an accident.
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TimeLady Victorious

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Re: Teenager invents low-frequency radio for underground communications
« Reply #4 on: February 02, 2010, 07:54:14 AM »

Nice to see a portable packet radio.
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mikehz

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Re: Teenager invents low-frequency radio for underground communications
« Reply #5 on: February 12, 2010, 08:13:26 AM »

It's pretty cool. A portable packet radio that works underground. Now, you can send the message of freedom to spelunkers.  :lol:
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yamnuska

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Re: Teenager invents low-frequency radio for underground communications
« Reply #6 on: March 20, 2010, 05:38:10 PM »

and it was invented by a teenager, oh the horror, the young are actually smart.
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