Am 31/07/2014 05:04, schrieb Rene Luria:
i believe in his case he need an complete outdoor solution, anytone have an tendency to feedback quickly and they dont have an detektor for such cases at all. you maybe not recognize that but maybe that thing creating signals nearby which interfere other channels or operator. on the point short before total oszilation will be a higher sideband noise which degrade the signal quality a bit and possible even creating some spurious emission. i changed some on existing installation to resolve such effects.
We use one baught from those guys: http://www.myamplifiers.com/ Works great and not too expensive