On Sat, 28 Jul 2007 22:07:17 -0400, GeoLane at PTD dot NET GeoLane at
PTD dot NET wrote:

On Thu, 26 Jul 2007 13:19:01 -0500, Don Foreman
wrote:

On Thu, 26 Jul 2007 11:45:46 -0400, "Lloyd E. Sponenburgh"
wrote:


"Michael A. Terrell" wrote in message
...
My alarm company is run by a couple old gentlemen named Smith and
Wesson. They don't make calls.

Can't get DSL where I am, because of all the old copper _in_the_air_ for the
1.6 miles to the local RT.

I live in Central Florida, too. And we lose a modem or phone at least twice
a year, from forgetting to unplug them when a storm comes up. (and no,
surge suppressors won't handle it... we just have to replace that along with
the modem, computer, or phone).

Surge suppressors will handle it, but not the wimpy ones you get at
Best Buy or Radio Shack. In Florida you need big MOV's like this:
http://www.epcos.com/inf/70/ds/LS41K.pdf

A bunch of electronic traffic controllers I designed were put into
service in Dade Country some years ago. Nothing short of a direct
hit bothered them. The only failures we saw, a couple a year or so,
were cremated inside the cabinet -- we're talking total crispy critter
and molten metal.

Don, which MOV from that chart do you recommend to relace the MOVs
that go in home surge suppressors like Isobar, etc. I know they have
a "lifetime" warranty, but if you want to rebuild it yourself and
really make it beefy, which MOV can you use for 110V surge
suppressors?

RWL

From that chart, I'd use the one rated for 130VAC: LS41K130QP.

Here's another one:
http://www.littelfuse.com/data/en/Da...ets/BA_BB2.pdf

Note that while these devices limit overvoltage from transients, they
don't eliminate it. The connected equipment must still be able to
stand brief (tens of microseconds in duration) transients of up to
maybe 400 volts or so. Most stuff like PC's TV's, etc can. If your
equipment to be protected is very sensitive, then it's best to use a
UPS.