How to Receive QO-100 Geostationary Amateur Radio Satellite with RTL-SDR?

I had seen a video by VU3IXV illustrating reception of QO-100 Geostationary Amateur Radio Satellite using a satellite TV dish antenna and RTL-SDR. Downlink from QO-100 is in the 10 GHz band while the upper limit of RTL-SDR does not reach anywhere near that. Yesterday I was having a discussion with WA4OSH on X. He told me that the LNB mounted on the dish is a block down-converter. The Bullseye 10 kHz LNB does not drift much and can be used for downconverting signals from QO-100. The designation 10 kHz is for the frequency stability and not the useful frequency range! Frequency range is typically 10489 to 12750 MHz, with output frequency of 739 MHz, which the RTL-SDR can very well receive.

Meanwhile VU2TUM shared write a up by DD5LP in which he describes in depth on his method of receiving QO-100 using a satellite TV dish antenna and an LNB. Signals from the narrow band transponder of QO-100 which is used for beacons, CW, SSB and digital modes can be downconverted this way for reception with RTL-SDR.

Direct current supply to the LNB is sent up the coaxial cable using a Bias-T unit which injects the voltage through a simple coil and capacitor arrangement. Another feature of the LNB is that when 12V is supplied, it selects vertically polarised antenna while horizontal polarization is selected when 18V is supplied. As the narrow band transponder of QO-100 uses vertical polarization, we should supply 12V through the Bias-T, which can either be homebrewed or purchased online.

https://www.dishpointer.com is useful for pointing the dish correctly at QO-100 satellite. As the satellite is geostationary, direction need to be set only once. There is option to search based on your location and the name of the satellite. While searching, Es’hail-2 has to be entered as QO-100 is one of the payloads on that geostationary satellite. DD5LP has mentioned that he needed -13° twist in the polarization at his location, which will be different at other locations. That is the ‘skew’ angle in addition to azimuth and elevation. That is done by twisting the LNB in its mount to the required angle, for which there are marks on the LNB case. He has also described in depth on how he went on adjusting the dish to get good signals after several trials and errors. Overall it looks like an exciting project and I have added it to my wish list, though I am not sure when that will materialize!