Well, remember my recent post where I discovered that my 9500ci wasn't alerting to K band? Doing a factory reset resolved the problem -- at least for the rest of that day. But now it is obvious that the antenna's K/Ka band LNA is dead. My 9500ci will respond to my K band transmitter only when I position my K band transmitter within a couple of feet of the antenna whereas normally I can set my K band transmitter on the roof of my car and pointed towards the sky and still get a moderately strong K band alert. This is a classic symptom of the K/Ka LNA being dead. X band, by the way, is absolutely fine.
Anyway, a few weeks ago we had another really close lightning strike about 1/8 mile from the house. That strike took out some electronics around the house and out in one of the astronomical observatory buildings even though the electronics were unplugged from AC power. In particular one of the stepper motor drivers for one of the telescopes got damaged. The EMP apparently was strong enough to generate over an 80 volt spike in the 15 foot cable running from the driver to the motor. And it takes more than 80 volts of induced reverse voltage to blow any of the output transistors on the stepper motor's driver board. So, this got me to thinking since I always to look for underlying connections rather than just assuming that things are mere coincidence. I wonder if the EMI pulse from the strike damaged the K/Ka LNA since it so recently failed. This is a strong possibility since my car, parked in the driveway, was facing in the general the direction of the lightning bolt. Thus, could the EMP from the bolt possibly enter the horn and damage the LNA? The K/Ka band LNA is fairly close to the front of the horn, so this seems like a real possibility to me.