Hi Flighttothemoon, are you located in Russia? What satellite are you trying to receive?
FYI - a circler LNB will not pick up H or V polarity very well, it should only be used on a satellite with circler L or R polarity.
How did you test the voltage at the LNB? I think you might have a bad cable run that is loosing voltage under load. Maybe try using a barrel connector at the LNB and add a short piece of coax with a slot cut in the side so you can test with the LNB hooked up.
Hope this helps, DC
OTA SR-15, FTA - three fixed Ku dishes: Fortec 80CM on 30W, another on 72W, one Winegard 76 CM on 97W. One WS9036 90 CM with motor for feed hunting on arc from 72 to 127W. Pansat 3500SD, Mercury II, AZBox Elite. C-band 10 foot mesh dish with Chaparral feedhorn. On the arc from 55.5W to 121W.