That was <i>one</i> specific station - the infamous WLW &#x2F; W8XO - the first and only US station authorized to operate at <i>500kW</i> of power.[1]<p>To give you an idea of how powerful that is, take a look at their coverage map: <a href="http:&#x2F;&#x2F;i.imgur.com&#x2F;Aigz1Zh.jpg" rel="nofollow">http:&#x2F;&#x2F;i.imgur.com&#x2F;Aigz1Zh.jpg</a><p>The back story is kind of interesting. It was run by Powel Crosley - a sort of 1930&#x27;s version of Elon Musk. Advertising revenues from the station were so successful he applied to increase the limit from 500kW to 750kW(!).<p>It&#x27;s a big deal in the ham community, but I only learnt latter that while US stations were limited to 50kW - other parts of the world didn&#x27;t have such restrictions. Parts of the Middle East have 2,000kW stations. [2]<p>You can get a full download on the Crosley WLW station in this video: <a href="https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=CbHjcwIoTiY" rel="nofollow">https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=CbHjcwIoTiY</a><p>[1] <a href="http:&#x2F;&#x2F;www.ominous-valve.com&#x2F;wlw.html" rel="nofollow">http:&#x2F;&#x2F;www.ominous-valve.com&#x2F;wlw.html</a><p>[2] <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Transmitter_Solt" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Transmitter_Solt</a>