On Dec 18, 6:19*pm, radiodavid wrote:
On Dec 18, 3:43*pm, wrote:

I think snow doesn't have any effect on AM transmitting.Too much ice
buildup though can, and sometimes does pull down towers and wires.
cuhulin

Critical Hours is a term for the period just after sunrise and just
before sunset, when a very few stations reduce power to keep from
interfering with other stations.

An example would be a station that is 50 kw day, 25 kw critical hours,
and 2.5 kw night.

When there is an emergency, a station can operate on its daytime
facility or, if directional, in non-directional mode to provide
community service. It is not permitted to run commercials.

A very bad blizzard, like a tornado, flood, hurricane or such event is
reason to consider such operations.

I knew about the period before and after sunrise - but I hadn't heard
of that term
"Critical Hours" before.

I know WLW hasn't ever done that that I know about, if they ever did
that that during a
storm for whatever reason it had to have happened before I was around
ten yrs. of age.

I would think that WLW or any of the 50,000watt stations wouldn't
decrease power during an emergency. {?} Interesting thread though.

Gregg wrote:


I knew about the period before and after sunrise - but I hadn't heard
of that term
"Critical Hours" before.


It's usually to protect a station to the East.

On Dec 19, 6:17*am, dave wrote:
Gregg wrote:

I knew about the period before and after sunrise - but I hadn't heard
of that term
"Critical Hours" before.

It's usually to protect a station to the East.

Didn't know that either David. Can you tell me why specifically only
stations to the east? :-)

"Gregg" wrote in message
...
On Dec 19, 6:17 am, dave wrote:
Gregg wrote:

I knew about the period before and after sunrise - but I hadn't heard
of that term
"Critical Hours" before.

It's usually to protect a station to the East.

Didn't know that either David. Can you tell me why specifically only
stations to the east? :-)

I would think this would be because of gray line skip. Points east will have
already begun receiving skip by the time a station considerably to the west
will have seen sunset.

On Dec 20, 3:08*am, "Brenda Ann"
wrote:
"Gregg" wrote in message

...
On Dec 19, 6:17 am, dave wrote:

Gregg wrote:

I knew about the period before and after sunrise - but I hadn't heard
of that term
"Critical Hours" before.

It's usually to protect a station to the East.

Didn't know that either David. Can you tell me why specifically only
stations to the east? :-)

I would think this would be because of gray line skip. Points east will have
already begun receiving skip by the time a station considerably to the west
will have seen sunset.

Ah. I see. I should have figured that out on my own. Thanks BA