Hallo dear friend Eduard, bun? seara!
I'm Roberto Pietrafesa, IZ7VHF from southern Italy.
I'm 43 years old aerospace engineer working where we build carbon fiber fuselage sections of Boeing 787 Dreamliner in Apulia region, southern Italy.
I'm interested in launching WSPR tracked balloon, and probably I will have my first launch within next month, May 2019, after couple of years of following project, helped by two nice men, Jim and Mikael.
I'm waiting to receive my PCB from manufacturer in China, in couple of weeks. Attached is a picure with layout (GPS module is below, not visible in this picture).
First and foremost, congraulations for your layout, it is very good, similar to an artificial satellite.
I have couple of question for you, if it is possible:
1) Do you use a step up converter for solar panel voltage? I see only 4 panels, so I suppose you haave 4x 0.6 Volt = 2.4 Volt, instead of 3.3 required by system to work.
2) What firmware are you using to send JT9 and WSPR?
Thank you and best wishes for your launches!
73 de IZ7VHF Roberto.
Roberto Pietrafesa
