[GreenKeys] OT: weather balloon telemetry part 2

[COURYHOUSE at aol.com]

Gil and others
looking back on the  site  I settled on  to    study with ...
 I  used. 
http://www.qrz.com/hamtest/
 
 
 
In a message dated 11/5/2013 8:50:10 A.M. Mountain Standard Time,  
gil at baudot.net writes:

OK folks, after some good info from several of you, it does sound like  
using 144.390 MHz APRS tracking would be the best bet for this balloon  project.


This means I need to study for a ham test now, but they seem to be  offered 
frequently enough, so I guess I will need to start learnin' some new  stuff!


Back to my question about antennas:  what to hang under the  balloon?  It 
has been pointed out how it needs to be omni.  I  suppose the simplest would 
be a 1/4 wave hanging down, and suspended by three  or four angled ground 
wires that connect to a simple  three-or-four-radial-dowel frame or something. 
 The antenna would  collapse on the ground (of course we hopefully have GPS 
coordinates for the  descent, so we can find it).


Any other antenna recommendations?  Dipole?  Patch?   Nothing commercial -- 
something I can fabricate out of lightweight wire or  foil.


thx,  gil




gil smith
greenkeys moderator
_gil at baudot.net_ (mailto:gil at baudot.net) 


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