I wonder what OSHA and CSPI (Center for Science in the Public Interest) had to say about broadcasting half a megawatt of rf power...
> From: Robert Johnson <[email protected]> > Date: Sat, 12 Nov 2005 10:12:57 -0500 > To: [email protected] > Subject: Re: Limit on AM Broadcast power, USA > > During WW II, WLW in Cincinnati broadcast at 500 KW in order to reach > the interior farmland of the US using ten parallel 50 KW transmitters. > Lots of annecdotes about singing fences, pickup in tooth fillings, etc. > It returned to 50 Kw after the war. > > Bob > > Ken Javor wrote: > >> 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 >> >> - >> ---------------------------------------------------------------- >> This message is from the IEEE Product Safety Engineering Society >> emc-pstc discussion list. Website: http://www.ieee-pses.org/ >> >> To post a message to the list, send your e-mail to [email protected] >> >> Instructions: http://listserv.ieee.org/listserv/request/user-guide.html >> >> List rules: http://www.ieee-pses.org/listrules.html >> >> For help, send mail to the list administrators: >> >> Scott Douglas [email protected] >> Mike Cantwell [email protected] >> >> For policy questions, send mail to: >> >> Jim Bacher: [email protected] >> David Heald: [email protected] >> >> All emc-pstc postings are archived and searchable on the web at: >> >> http://www.ieeecommunities.org/emc-pstc >> >> >> >> > > - > ---------------------------------------------------------------- > This message is from the IEEE Product Safety Engineering Society > emc-pstc discussion list. Website: http://www.ieee-pses.org/ > > To post a message to the list, send your e-mail to [email protected] > > Instructions: http://listserv.ieee.org/listserv/request/user-guide.html > > List rules: http://www.ieee-pses.org/listrules.html > > For help, send mail to the list administrators: > > Scott Douglas [email protected] > Mike Cantwell [email protected] > > For policy questions, send mail to: > > Jim Bacher: [email protected] > David Heald: [email protected] > > All emc-pstc postings are archived and searchable on the web at: > > http://www.ieeecommunities.org/emc-pstc > - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to [email protected] Instructions: http://listserv.ieee.org/listserv/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas [email protected] Mike Cantwell [email protected] For policy questions, send mail to: Jim Bacher: [email protected] David Heald: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
