Welcome to the Free Talk Live bulletin board system!
This board is closed to new users and new posts.  Thank you to all our great mods and users over the years.  Details here.
185859 Posts in 9829 Topics by 1371 Members
Latest Member: cjt26
Home Help
+  The Free Talk Live BBS
|-+  Free Talk Live
| |-+  General
| | |-+  Teenager invents low-frequency radio for underground communications
Pages: [1]   Go Down

Author Topic: Teenager invents low-frequency radio for underground communications  (Read 2325 times)

0 Members and 1 Guest are viewing this topic.

anarchir

  • Extraordinaire
  • Offline Offline
  • Posts: 5103
  • No victim, no crime.
    • View Profile
    • Prepared Security

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.
Logged
Good people disobey bad laws.
PreparedSecurity.com - Modern security and preparedness for the 21st century.
 [img width= height= alt=Prepared Security]http://www.prepareddesign.com/uploads/4/4/3/6/4436847/1636340_orig.png[/img]

anarchir

  • Extraordinaire
  • Offline Offline
  • Posts: 5103
  • No victim, no crime.
    • View Profile
    • Prepared Security
Re: Teenager invents low-frequency radio for underground communications
« Reply #1 on: February 02, 2010, 02:18:31 AM »

Well I found it relevant.
Logged
Good people disobey bad laws.
PreparedSecurity.com - Modern security and preparedness for the 21st century.
 [img width= height= alt=Prepared Security]http://www.prepareddesign.com/uploads/4/4/3/6/4436847/1636340_orig.png[/img]

Sam Gunn (since nobody got Admiral Naismith)

  • A Cut Above The Rest
  • Offline Offline
  • Posts: 8299
  • If government is the answer, the question is stupi
    • View Profile
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?
Logged
"Do not throw rocks at people with guns." —Hastings' Third Law
"Income tax returns are the most imaginative fiction being written today." —Herman Wouk 

"If you want total security, go to prison. There you're fed, clothed, given medical care and so on. The only thing lacking... is freedom." - Dwight D. Eisenhower

anarchir

  • Extraordinaire
  • Offline Offline
  • Posts: 5103
  • No victim, no crime.
    • View Profile
    • Prepared Security
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.
Logged
Good people disobey bad laws.
PreparedSecurity.com - Modern security and preparedness for the 21st century.
 [img width= height= alt=Prepared Security]http://www.prepareddesign.com/uploads/4/4/3/6/4436847/1636340_orig.png[/img]

TimeLady Victorious

  • Aprilicious
  • Offline Offline
  • Posts: 3837
    • View Profile
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.
Logged
ENGAGE RIDLEY MOTHER FUCKER

mikehz

  • Offline Offline
  • Posts: 8033
    • View Profile
    • Day by Day
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:
Logged
"Force always attracts men of low morality." Albert Einstein

yamnuska

  • Guest
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.
Logged
Pages: [1]   Go Up
+  The Free Talk Live BBS
|-+  Free Talk Live
| |-+  General
| | |-+  Teenager invents low-frequency radio for underground communications

// ]]>

Page created in 0.08 seconds with 32 queries.