[
www.mwpersons.com] and [
www.mwpersons.com] Neat INFO to know. I have a 400V arc cartridge on my Part 15 AM1620. Keep in mind that this will not take a direct-hit from lightning. However, those really close strikes, the spikes from those can be arc-shunted to ground, protecting circuitry after that. Again, good to know. (THANKS, Boomer for FWR that!)