Environment Canada has been using the Grau DFM-06 radiosondes for some time. The Canadian Military also uses radiosondes and I have noted Vaisala RS41 being launched from Petawawa, Ontario but these l

hydrogen cylinders and regulators use a CGA-350 connector. https://www.concoa.com/cgachart.html https://www.concoa.com/docs/catalogs/ADC3010%20AF%20Specialty%20Gas%20Catalog/Charts/ADC3010%20AF%20CGA%

A well done to all. It is indeed encouraging to see the younger generation getting involved in such a hands on way in this type or activity. I jealously follow the postings on this GPSL group. For tho