Comments on: High Altitude Balloon Transmitter http://www.SWHarden.com/blog/2010-07-14-high-altitude-balloon-transmitter/ A collection of thoughts in technological degradation Wed, 08 Feb 2012 09:12:28 -0700 http://wordpress.org/?v=2.8.6 hourly 1 By: Anonymous http://www.SWHarden.com/blog/2010-07-14-high-altitude-balloon-transmitter/comment-page-1/#comment-16526 Anonymous Mon, 08 Aug 2011 14:29:17 +0000 http://www.SWHarden.com/blog/?p=2283#comment-16526 The transmitter is easy enough to build, but what would I be looking at for a receiver? As long as I can get an audio signal, I should be able to interpret it, but how good does the receiver have to be? The transmitter is easy enough to build, but what would I be looking at for a receiver? As long as I can get an audio signal, I should be able to interpret it, but how good does the receiver have to be?

]]> By: Anonymous http://www.SWHarden.com/blog/2010-07-14-high-altitude-balloon-transmitter/comment-page-1/#comment-12348 Anonymous Mon, 03 Jan 2011 23:41:41 +0000 http://www.SWHarden.com/blog/?p=2283#comment-12348 Awesome Awesome

]]> By: Anonymous http://www.SWHarden.com/blog/2010-07-14-high-altitude-balloon-transmitter/comment-page-1/#comment-11640 Anonymous Fri, 26 Nov 2010 10:44:15 +0000 http://www.SWHarden.com/blog/?p=2283#comment-11640 Just buffer the output with a couple of MOSFET/BJT transistors, and it's easy to go over 5W without any RF-specific circuit complexity. Nice idea circuit! (even though it does not fit the international radio regulations...) Just buffer the output with a couple of MOSFET/BJT transistors, and it’s easy to go over 5W without any RF-specific circuit complexity.

Nice idea circuit! (even though it does not fit the international radio regulations…)

]]> By: Petar http://www.SWHarden.com/blog/2010-07-14-high-altitude-balloon-transmitter/comment-page-1/#comment-11309 Petar Sat, 13 Nov 2010 19:47:37 +0000 http://www.SWHarden.com/blog/?p=2283#comment-11309 Hello, can you give me the oscilator product number. I search for oscilator here in Bulgaria, but i found only with 2 legs. Btw, i`ll use and modify your schematic - thanks for posting! :) Hello,
can you give me the oscilator product number. I search for oscilator here in Bulgaria, but i found only with 2 legs.
Btw, i`ll use and modify your schematic – thanks for posting! :)

]]> By: Scott http://www.SWHarden.com/blog/2010-07-14-high-altitude-balloon-transmitter/comment-page-1/#comment-10246 Scott Wed, 28 Jul 2010 12:41:33 +0000 http://www.SWHarden.com/blog/?p=2283#comment-10246 Yes and no. I found settling time was less than half a second, and that it didn't affect Morse code copyability at all. In the spirit of designing the simplest-case transmitter, I still feel my design was optimal for the goal of the project. In future launches, I will certainly consider a much-improved transmitter. P.S. rather than gating the transmitter output, I'd just enable/disable the amplifier with the "output enable" pins ;-) Yes and no. I found settling time was less than half a second, and that it didn’t affect Morse code copyability at all. In the spirit of designing the simplest-case transmitter, I still feel my design was optimal for the goal of the project. In future launches, I will certainly consider a much-improved transmitter.

P.S. rather than gating the transmitter output, I’d just enable/disable the amplifier with the “output enable” pins ;-)

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