434.300 MHz balloon to launch from Danbury

Chris Stubs M6EDF with 434 MHz trackers

Chris Stubs M6EDF with 434 MHz trackers

On Saturday, March 29, at around 10:00 GMT Chris Stubbs M6EDF will be launching a balloon CHEAPO carrying a payload transmitting 50 bps 7n2 RTTY on 434.300 MHz USB.

Chris gave a well received presentation on high altitude balloons at a recent Chelmsford Amateur Radio Society (CARS) Skills Workshop. His latest launch will take place from Danbury Common at around 10 AM on Saturday, March 29.

The forecast looks like the balloon will take a scenic path along the east coast of England before being lost forever over Scotland, see http://ready.arl.noaa.gov/hypubout/184444_trj001.gif

The balloon could have a radio range of 300-500 km depending on altitude.

There should be a number of other balloons transmitting between 434.050 and 434.575 MHz also launching on Saturday.

Predicted track for CHEAPO launch on March 29, 2014

Predicted track for CHEAPO balloon on March 29, 2014

You can see online real time tracks and frequencies of all the balloons at

Listen to the balloons online from anywhere in the world with the SUWS 434 MHz WebSDR (select USB)

Beginners Guide to Tracking using dl-fldigi

Free iPhone balloon tracker HABHub can be downloaded from iTunes store https://itunes.apple.com/nl/app/habhub/id737310999?l=en&mt=8

Check the #highaltitude IRC channel for chat about launches. A web client is available at

To get up-to-date information on balloon flights subscribe to the UKHAS Mailing List by sending a blank email to this address: ukhas+subscribe@googlegroups.com

Chris Stubbs M6EDF http://chris-stubbs.co.uk/

The CARS amateur radio skills workshops are held on the 3rd Monday of each month at the Danbury Village Hall, CM3 4NQ. The Skills Workshops are open to all, and there’s no charge for attending. For details, and to sign up for email updates, see

To find out more about amateur radio and the Chelmsford training courses speak to Clive G1EUC on
Tel: 01245-224577
Mob: 07860-418835
Email: training2014 at g0mwt.org.uk
Web: http://www.g0mwt.org.uk/training/

What is Amateur Radio ? http://www.essexham.co.uk/what-is-amateur-radio