Lightning protection for TV Antenna
Make sure the antenna pole is grounded. Disconnect the antenna plug during thunderstorms, and all should be fine. You cannot of course prevent damage from a direct hit. I would also recommend physically unplugging (not just switching off) expensive electronics, both from power line and telephone line (e.g. DSL modems). Lightning arcs will easily jump over at least two switched off mains switches (in series).

Most lightning surge protection systems exist to suppress surges when lightnings strike some distance away (many hundred meters away). If there is a direct strike on your building, it will probably end up with a hole in the roof and a broken water tank. This is what building lightning arrestors protect against. A grounded antenna pole might do this job.