A pre-programmed Sandisk 16 GB or 32 GB Micro SD Card (depending on availability) for use in the Portsdown DATV transmitter.
This card is pre-programmed with the either the Portsdown 2020 software for the older Raspberry Pi 3 or the more recent Portsdown 4 software for the Raspberry Pi 4. The Raspberry Pi 4 is recommended for new builds. Make sure that you choose the right card for your needs.
The card can easily be upgraded to the latest issue using the upgrade facility in the Portsdown menu system. Full details of the Portsdown project are available at https://wiki.batc.org.uk/Portsdown_Transmitter_User_guide