DIYbanter - View Single Post - Yamaha receiver / Proscan TV problem after lighting storm ***

(Barry Mann) wrote in message . com...
In , on 07/17/03
at 06:26 PM, (Foo Man Choo SE) said:

[ ... ]

Expand your inquiry. It is possible that there is a power distribution
problem on or near your block. You can register your concern with the
local utility, but they usually don't pay too much attention to a
single complaint. In one case there was a TV interference problem that
covered several blocks. Clearly it was associated with the power line,
but it took months to convince the utility company to send out its
diagnostic truck. Finally, after a phone-in campaign was organized, the
utility came out, found, and fixed the problem.
Good idea, I'll check with the our power company -- it can't hurt.

If your ground is not so good, surge suppressors don't work well. Also,
cheap surge suppressors are a complete waste of time because they offer
little protection.

The MOV based surge suppressors, while very effective, generally fail
"open" (the device stops "eating" the surges and begins passing them
through). Unfortunately, unless they are obviously burned, there is no
practical way to test MOV's in the field. Cheap designs force the MOV
to deal with the full brunt of the surge. MOV's can deal with one "big
one" and thousands of smaller surges. It is always possible that the
day after you install the cheap suppressor, that big will come along,
the MOV will sacrifice itself to protect your equipment, and die. Good
designs use other methods to remove the gross surge energy, leaving the
MOV to safely deal the the remainder.

If you have frequent power outages consider installing a "lockout"
device. In many cases a series of surges is generated when the power is
turned on again that are larger and more dangerous than the one
generated by the original distant event. The lockout device will
disconnect your delicate equipment from the power line if power is
interrupted. You can wait and reset the lockout device manually after
the situation has stabilized.
This sounds interesting. Can you suggest a specific model or
manufacturer? Is it something that requires professional
installation?

If you have long runs of telephone, computer network, or speaker wire
inside your house and you live in a severe lightning area, you'll need
to re-think things because a nearby strike that can be completely
stopped at your service entrance, can still induce a damaging transient
directly into a long run of wire. (sorry, I can't be precise about how
long is "long")
Hmm, I have lots of long runs of speaker wiring, CAT5, security and
RG6 coax. How does the damaging transient get into the wiring in this
case? What can be done for protect in this case?

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