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Old AM Radio License Classes

J

js6592

I'm curious about the old AM station license classes and the amount of power they were allowed. If I remember correctly, they went like this:

Clear Channels:

I-A 50,000-U non-directional
I-B 50,000-U DA-N
II-A 50,000-U DA-1 (or DA-2 or DA-3, etc.)
II-B Anywhere from 50,000 down to 10,000, day or night, possible directional antenna
II-C Anywhere from 50,000 down to 250 day or night, possible directional antenna
II-D Anywhere from 50,000 down to 250, daytime only, possible directional antenna

Regional Channels:
III-A Anywhere from 5,000 down to 500, day or night, possible directional antenna
III-B Anywhere from 5,000 down to 500, daytime only, possible directional antenna

Local Channels:
IV 1,000-D, 250-N, non-directional

P.S. I know there were other classes, such as Alaska and Hawaii having the class N, but I'm mainly concerned about the ones stated above. Anybody remember?
 
js6592 said:
I'm curious about the old AM station license classes and the amount of power they were allowed. If I remember correctly, they went like this:

Clear Channels:

I-A 50,000-U non-directional
I-B 50,000-U DA-N
II-A 50,000-U DA-1 (or DA-2 or DA-3, etc.)
II-B Anywhere from 50,000 down to 10,000, day or night, possible directional antenna
II-C Anywhere from 50,000 down to 250 day or night, possible directional antenna
II-D Anywhere from 50,000 down to 250, daytime only, possible directional antenna

Regional Channels:
III-A Anywhere from 5,000 down to 500, day or night, possible directional antenna
III-B Anywhere from 5,000 down to 500, daytime only, possible directional antenna

Local Channels:
IV 1,000-D, 250-N, non-directional

P.S. I know there were other classes, such as Alaska and Hawaii having the class N, but I'm mainly concerned about the ones stated above. Anybody remember?
Click to expand...


I-B was directional or non-directional, depending. WGY and KOA were 1-B's, but non-directional. It was more about the channel being shared vs. unshared.

Two 1-A stations are and were directional: WWL and WBZ.
 
iii-b'S WERE NOT NECESSARILY DAYTIMERS, THEY WERE MORE ABOUT WHAT LEVEL OF INTERFERENCE THEY WERE ALLOWED TO GIVE AND HOW MUCH THEY HAD TO TAKE
 
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