All,

I need to know what the legal rf transmit power limit is for broadcasters in
the 530 to 1710 kHz AM broadcast band in the USA.  I believe the number is
50 kW, but I have several questions:

1) Is 50 kW correct?

2)  Whether the correct answer to (1) is 50 kW or another number, does that
number represent effective radiated power?  That is, does the number include
antenna gain or is it just the transmitter power available at the antenna
input terminal?

3) If the number is just transmit power, is 4 dBi a reasonable maximum gain
for a real-world AM broadcast antenna?

4)  Whether the power figure is ERP or just power available to the antenna,
does it represent average or unmodulated power, or is it the envelope of
peak modulation?

Thank you in advance,

Ken Javor

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