| Balonowa Baza Wiedzy, linki do informacji, archiwum |
| Ciekawy link https://picoballoon.ist/2018/10/07/pbf-14/ http://appnotes.etherkit.com/2016/04/10-milliwatt-si5351a-wspr-beacon/ https://www.tracksoar.com/ kit: https://www.hamshop.cz/hab-a-aprs-c34/ |