UK: Radio 4 still puts out at least 400KW am on 198KHz for the time being, but will be phased out in the next decade or so. There is something slightly magic about pumping that much power into an impedance that is basically the air...<p><a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Droitwich_Transmitting_Station" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Droitwich_Transmitting_Station</a><p><a href="http:&#x2F;&#x2F;www.bbceng.info&#x2F;Operations&#x2F;transmitter_ops&#x2F;Reminiscences&#x2F;Droitwich&#x2F;droitwich_calling.htm" rel="nofollow">http:&#x2F;&#x2F;www.bbceng.info&#x2F;Operations&#x2F;transmitter_ops&#x2F;Reminiscen...</a><p>Edit: typically I can&#x27;t find a definitive figure for the power output...