I had contact with an Aliexpress supplier where I ordered another special type LNB (DRO type with 9GHz LO) and asked if they would be interested in producing a smallish number of special PLL LNB with lower default LO and capability for external reference.
They appear to be interested in that.
As a first proposal I sent the following characteristics:
- PLL type
- receive frequency 10.489-10.500 GHz
- LO frequency 9.244 GHz or 10.049.88 GHz (same ratio as 9.75/10.6) (IF 439 MHz or 1245 MHz)
- optional locking to external frequency reference (sent via the cable) of LO/390 or LO/424.
- 20mm round waveguide with dielectric lens
and provided them with some links to info about QO-100.
Maybe people have other things to add to that?