Edwin Johnson wrote:
On 2015-04-24, Ian Jackson wrote:

See
http://www.allsopp.co.uk/

Those are pretty sophisticated balloons. Bet those are similar to the
aerostats the US uses around the Gulf of Mexico for surveillance purposes.
Those are tethered and go up thousands of feet and are marked on our
aeronautical charts. Prices must be high on those, out of the limits of the
average ham here. hi

73 ...Edwin, KD5ZLB
__________________________________________________ __________
"Once you have flown, you will walk the earth with your eyes
turned skyward, for there you have been, there you long to
return."-da Vinci http://www.kd5zlb.org

What you want is something that is a combination of a kite and a balloon
and is more kite than balloon to avoid having to have a lot of helium.

As it need not be man rated, you could make it from tissue, light wood,
with party balloon fillers.

Or if you are feeling adventurous, use hydrogen making sure there are
no sparks at the end of your antenna.


--
Jim Pennino