skipp025 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
I'm a little confused, Skipp (nothing new there!). Are you saying that the preamp detects lightning by the rf bypass switching? After all, a repeater always transmits when it is receiving. I am assuming that you place the preamp between the duplexer and the receiver. -- 73, Larry, W1HJF rapp at lmr dot com
