Sid Schweiger ) writes:

What is a clear channel station?

It's now an obsolete term, but "clear channels" were AM frequencies with only
one station on them. What are now referred to as "clear channel" stations (not
to be confused with Clear Channel Communications, the group station owner) are
for the most part the 50-kW AM stations using non-directional antennas, many of
which have been around since AM radio's early days of the 1920's.


Also known as single stick stations, as their antennas use only a single
tower and radiate omnidirectionally.

--
Craig Jackman - Audio Production and Sound Design
Multi-award winning Creative Production, Station Imaging, Comedy, Voices
"Pride is the attitude that separates excellence from mediocrity!"
Ottawa, Ontario, Canada

What is a clear channel station?

It's now an obsolete term ...


Hardly.

Clear channels a 540, 640-780, 800-900, 940, 990-1140, 1160-1220, 1500-1580.

Local channels a 1230-1240, 1340, 1400, 1450, 1490

All other channels are Regional channels.

It's clear that the most channels are clear channels.

The popular meaning of the term may have changed, but the legal definition
hasn't.

There is at least one Class I station (either Class I-A or Class I-B) on every
clear channel, and all such clears are clearly identified in the NARBA and Rio
treaties as to power and antenna efficiency (although for some Mexicans, the
antenna efficiency may be bogus).



Also known as single stick stations, as their antennas use only a single tower
and radiate omnidirectionally.


In general, Class I-As are single-stick.

But, there are as many Class I-Bs which are single stick as there are Class
I-As which are DA-1.

Class I-As which are or have operated DA-1: 660, 870, 1030, 1100, 1580.

Class I-Bs which operate ND: 680, 810, 850, 940, 1070, 1550


Also, there is a single stick Class II-B on a clear channel where the Class I-A
is DA-1: 1580

And, there is a Class I-A which protects a Class I-B: 1540, protecting KXEL,
which is a Class I-B.

Finally, there are Class I-Bs which protect Class II-Bs: 710 and 1510.

On 15 Jan 2004 17:48:19 GMT, inch (Peter H.) wrote:

What is a clear channel station?
It's now an obsolete term ...

Hardly.

Clear channels a 540, 640-780, 800-900, 940, 990-1140, 1160-1220, 1500-1580.

Local channels a 1230-1240, 1340, 1400, 1450, 1490

All other channels are Regional channels.

It's clear that the most channels are clear channels.

The popular meaning of the term may have changed, but the legal definition
hasn't.

Then I think most of us are using the popular term which meant there
was only one station on the frequency. Not even a daytimer shared it.

Rich

Then I think most of us are using the popular term which meant there was only
one station on the frequency. Not even a daytimer shared it.


U.S. Class I-A clears a 640-670, 700, 720, 750-780 820-840, 870-890,
1020-1040, 1100, 1120, 1160, 1180, 1200-1210

Canadian Class I-A clears: 540 (first), 690, 740, 860, 990, 1010, 1580

Mexican Class I-A clears: 540 (second), 730, 800, 900, 1050, 1220, 1570

I'm having trouble thinking of a single U.S., Canadian or Mexican Class I-A
clear channel which did not have at least one co-channel daytimer somewhere in
the U.S.

And, remember that stations in the U.S. territories (and former territories,
now states) were allowed to operate on U.S. Class I-A clears many decades
before "Rio" caused all clears to be completely broken down.

"Peter H." wrote in message
...


Then I think most of us are using the popular term which meant there was
only
one station on the frequency. Not even a daytimer shared it.


U.S. Class I-A clears a 640-670, 700, 720, 750-780 820-840, 870-890,
1020-1040, 1100, 1120, 1160, 1180, 1200-1210


Canadian Class I-A clears: 540 (first), 690, 740, 860, 990, 1010, 1580

Mexican Class I-A clears: 540 (second), 730, 800, 900, 1050, 1220, 1570

I'm having trouble thinking of a single U.S., Canadian or Mexican Class
I-A
clear channel which did not have at least one co-channel daytimer
somewhere in
the U.S.

Very old examples would be WOI in Ames on 640, KVFD/KPOP/KGBS on 1020, KOB
and WEW on 770, Kannapolis on 760, Lansing on 870, Oklahoma City on 890.
1100 in San Francisco. 1160 in Chicago. 660 in Dallas.

And, remember that stations in the U.S. territories (and former
territories,
now states) were allowed to operate on U.S. Class I-A clears many decades
before "Rio" caused all clears to be completely broken down.

650, 760, 830, 870, 1040, 1210 in Hawaii. 660, 700, 750 in Alaska.