Hi,
The Pluto is running now from 10 to 40 MHz multiplier. A 100 ohm resistor is put on output (40 MHz) in parallel. Using longer coax cables it was not needed. The same result may be occured if L6 is omitted.
Now there are two stations in parallel with common LNB and same output stage. The Pluto station is end to end GPSDO based.