Homebrew PCBs

--- In Homebrew_PCBs@yahoogroups.com, "crankorgan" <john@k...> wrote:
> Dave,
>      When a building is struck by lightning, long runs of wires in 
> the building like Alarms and Computer networks, receive an induced 
> high voltage. Some circuits use a spark gap.  The gap can be a 
simple 
> gap to ground or a solid state device. The old devices looked like 
> tubes. My guess is the are spark gaps....then again they could be 
> test points.
>                                                   John  


I'd go for the spark gaps.  there are pleanty of individual posts 
lableled TP3 and such.

but it seems a strike would wipe out the whole board, even with some 
drain.

Dave