[ARC5] Cool but Pointless

[Michael Bittner]

The book "Radio for the Millions" shows a homebrew "Light-Beam Transmitter" on pages 179 - 181.  The transmitter is a flashlight modulated by a buzzer.  The receiver uses a photo tube with a 1D8GT amplifier for earphone reception.  Published by Popular Science in the 1940s.  I think copies are availble on-line.  Mike, W6MAB
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  ----- Original Message ----- 
  From: Jay Coward via ARC5 
  To: k1lky68 at gmail.com ; vk2bcu at operamail.com 
  Cc: arc5 at mailman.qth.net 
  Sent: Tuesday, February 16, 2016 9:57 AM
  Subject: Re: [ARC5] Cool but Pointless


  I remember a Popular Electronics article years ago on how to make your own laser comms using gas tube lasers and small telescopes along with mod/demod that you had to build. 
  Jay



  -----Original Message-----
  From: Roy Morgan <k1lky68 at gmail.com>
  To: Leslie Smith <vk2bcu at operamail.com>
  Cc: ARC-5 List <arc5 at mailman.qth.net>
  Sent: Mon, Feb 15, 2016 2:24 pm
  Subject: [ARC5] Cool but Pointless


  On Feb 15, 2016, at 2:52 PM, Leslie Smith <vk2bcu at operamail.com> wrote:…
  Re: [ARC5] The International System of Units (SI)
  > ...
  > In Tasmania (VK7 is a small island south of the Australian mainland) a
  > group has been experimenting with long range optical communication. ... they got communication (by light)
  > from Hobart to Launceston. That's about 120 miles. … That's pretty
  > cool, in my book. At the same time it was quite pointless. 

  Leslie,



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