Andrew,
The great thing about AMSAT's GOLF program is the flexible capabilities of its communications payload. Providing options make us more inclusive, rather than forcing you to use a specific band or mode. GOLF-Tee will have a V/u transponder and an SDR-based experimental package to allow a 1 Mbps downlink in the 10 GHz band. https://www.amsat.org/greater-orbit-larger-footprint-an-introduction-to-the-... I know you are already V/u capable, so that leaves only the 10GHz downlink 38BDU is absolutely correct. TV LNBs are a cheap entry point to receive X-band. Unfortunately, U.S. satellite TV frequencies are different then the rest of the World, so we have more of a challenge. We will have to purchase from overseas or find something locally. DirectTV's International World products look promising. Their DTV36LNB is capable of 10GHz RX, using a 436 MHz IF. The LNB is running about $10 USD and a companion 36" dish for $60. QO-100 has proven that Hams will always rise up and share or offer affordable communication alternatives. If there is a cheaper and better way of doing it, we will collectively find a way to do it. Robert, KE4AL