Testing with an Octagon 0.1db Quad High Gain HD Ready Universal low-noise block downconverter (LNB). This is very sensitive but drifts - for SSB / CW it must be modifed, either change the crystal to a TCXO or add support for an external reference such as the Leo Bodnar GPSDO. Drift is much worse in the daylight for obvious reasons.
There is a special feature in SDR Console which locks the receiver to the digital beacon on the narrow-band transponder, so reception is perfect.
The output frequency of the LNB is ~739MHz, the LNB also has considerable gain - up to 65dB!
A LNB must be powered, the supply voltage determines the polarisation. Typically 13v for vertical and 18v for horizontal polarisation. Power supplies are not expensive, for example Labgear PSUFC on Amazon.