I have a site where my GasFet preamp would blow every spring like clockwork. Seems as though once lightning season started, just the static in the air from strikes afar would take it out. After the 3rd time, I switched to a bipolar version preamp, and have not touched it in 7 years. Not able to tell any difference. The squelch opens at .07uV, the lowest setting on the service monitor. I have to either pull the cable or switch the generator output off the RF in and over to the Gen out to get the receiver to squelch. (Micor rx, btw).
--- In [email protected], "skipp025" <[EMAIL PROTECTED]> wrote: > > At one location I had an ongoing problem with gasfet preamp failures. > Over time I suspected the failures were done on purpose (yeah people > do those sort of things). . > > I replaced the last blown preamp with a similar spec unit that > contained internal rf bypass switching when transmit power is > detected in the coax line. > > The system has been rock solid since the rf sense switching preamp > was placed in service. No more in-line attenuator... and we can > actually control the preamp from the site controller. If the preamp > fails we can switch it off (out of line) while the service call is > set up. > > cheers, > skipp > > > "JOHN MACKEY" <jmackey@> wrote: > > When the ARR pre-amp blows it becomes about a 40DB attenuator, > > just like most other pre-amps > > >
