On Jan 12, 12:36*pm, Red wrote:
*I didn't say a strike, I said a surge.
*I've lost 3 tv's at a different location fromlightningsurges
(nearby but not direct strike) coming into the tuner section via
CATV.

First a lightning strike is a surge.

Second, sacrificial protection does not exist - is a myth. A surge
is electricity. That means electricity flows through everything in
that path from cloud to earth. Only after does something or multiple
things fail. You have assumed surges do damage like waves crashing on
a beach. Electricity does not work that way.

Third, protection is defined in another post on 11 January 2008 in
the newsgroup newsguy.general entitled "Lightning Strikes" at:
http://tinyurl.com/22race
Everything in that post defines what provides TV protection.

Fourth, you have assumed lightning surge entered on cable. Then what
is the outgoing path to earth? Any properly installed cable first
connects to earth ground before rising up to enter the building.
Connected to earth means a surge will not seek earth ground,
destructively, via the TV. What is the incoming surge path? What
good is a 'sacrificial' amp when cable should already dump the
incoming surge to earth before entering the building?

Fifth, surges typically enter from wires located highest on poles -
AC electric. Incoming on AC electric, into TV, and out to earth
ground via tuner and cable. Protection means the incoming wire should
be earthed before entering the building. That is what one properly
earthed 'whole house' protector does. Earthed to the same electrode
that cable TV wire connects.