External TCXO 50ppb 25MHz, twisted pair PETV-0.2, multi-colored (dark red - on the case, golden - 25 MHz) is connected to the load 68 Ohm 0805, through 1000 pF 0805 served on 7 leg / RDA3566Q.
- the cable, even the thinnest, elementarily tears tracks from the LNB board with details ...
- soldered to pre-tinned holes, a 0.12mm tin, a thicker one does not climb.
It works stably, good gain.
I tried it on the 6th leg, it works too, but after a couple of minutes an instability appears, the gain drops by ~ 10 dB, then it gets worse ...
Power TCXO - + 12V 0,2A / 30mA - a separate wire.