Magic valley Astronomical Society Near Space
Balloon Program


Equipment
   Kimberly IGATE
   KD7VKZ Tilt/Pan
   K6ZVA Trailer
   K6ZVA Flight-Tracker
   K6ZVA ATV Transmitter
   K6ZVA Cut-Down
   KD7VKZ Tracker
   Alt/Az -> HA/Dec
   Kenwood TH-D7
Missions

Global Links
(Open in new window)
Magic Valley Hams
It was great fun, but there has been no new balloon activity since 2006, and I don't expect anything new.

K6ZVA Cutdown

There are a number of reasons why it is desirable to separate the balloon from the rest of the flight stack. This one accepts commands from the ground. The high power APRS transciever is set in repeater mode where it receives 600KHz above the 144.39 standard APRS channel. It listens for two specific DTMF tones on 144.99MHz, and closes a relay for four seconds when it hears them. This contact closure sends 5 Amps at 5 Volts through a 18 guage zip cord extending through the center of the chute.
   

The business end

The business end

4" of 36ga. wire wrap wire wrapped around a nylon cord. Note the heat shrink tubing .
   

Heat shrink in place

Heat shrink in place

.
   

Mounted on the parachute

Mounted on the parachute

.

©1999 - 2017 Magic Valley Astronomical Society
Design and Hosting provided by Internet Marketing Specialists.