Total posts : 45366
Tim posted an excellent essay on making the maximum use of the Part 15 power limits AS THEY ARE, before seeking an increase in power.
This is a good place to attach a reference to one of those Part 15 rules most of us tend to skim past without reading…
15.15 General Technical Requirements (excerpt) (c.) …the parties responsible for equipment compliance are encouraged to employ the minimum field strength necessary for communications…
That’s exactly what I do here at KDX Worldround Radio!
But of course I am one of those people described by Tim in a category who listens to his own station. If I can receive it, no more power is needed because I am not trying to “serve” the neighbors.
KDX AM 1670 transmits with 36 mW to the final RF stage! That’s the lowest setting for the AMT5000, which can be set at 100 mW and even up to 368 mW. With my Sangean U1 Yard Radio I can receive KDX all over the yard! Yet when I drive out, the signal doesn’t get very far because it doesn’t need to.
KDX-FM is even closer to home, used indoors only for audio editing and studio transmitter link, the Part 15.239 level is worthless for yardcasting.
(FOR THE RECORD: I support an increase of 15.239 to match Canadian BETS levels, not for my own benefit, but because it would reasonably improve circumstances for FM broadcasters that I feel are insulted by 15.239, which surely must be an FCC joke.)