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ARRL Special Bulletin ARLX042 (1995)

ARLX042 TX balloon launch set
QST de W1AW  
Special Bulletin 42  ARLX042
From ARRL Headquarters  
Newington CT  August 15, 1995
To all radio amateurs 
ARLX042 TX balloon launch set
The North Texas Balloon Project has scheduled its seventh high
altitude balloon experiment carrying Amateur Radio payloads on
August 19, 1995.  The payload carries a variety of amateur stations
that can be used by anyone with a Technician class or higher
The launch will be from Clifton, Texas (between Waco and Fort
Worth), at approximately 1430 UTC.  In the event of inclement
weather, the launch will be delayed until the next day, and then to
August 26, if necessary.
The morning of the launch an information net will meet on 7.155 MHz.
Approximately two hours after launch, the balloon is expected to
reach an altitude of 95,000 feet before it bursts.  At this altitude
the radius of radio coverage will be about 370 miles in all
directions, for a 740-mile communication range.  On past missions,
there have been QSOs as far as between Corpus Christi, Texas, and
Salina, Kansas.
Here's a list of some of the experiments on board:
Two crossband FM voice repeaters, open to all:
Uplink: 147.450 MHz, Downlink: 445.850 MHz; 
Uplink: 147.570 MHz, Downlink: 445.970 MHz.
1200 baud AFSK packet telemetry: 144.290 MHz.
Amateur television will be supplied by a 10-watt transmitter on
439.250 MHz, vertically polarized (cable TV channel 60).  With a
440-MHz gain antenna and reasonably low noise amplifier, a
cable-ready television set tuned to channel 60 should be able to
receive an acceptable signal, the sponsors say.
QSLs may be had through KG5OA at his Callbook address.


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