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Article #280Re: Consumer Reports: iPhone 4 - Not recommended
From: Jeff Liebermann
Date: Mon, 19 Jul 2010 05:17
Date: Mon, 19 Jul 2010 05:17
27 lines
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2944 bytes
On Mon, 19 Jul 2010 05:03:01 +0000, Larry <noone@home.com> wrote: >> <http://www.motorola3watts.com/product_info.php?products_id=34> >12 watts ERP, actually. I have a 6dbd, not i, antenna for it. Too bad the FCC doesn't offer a reward for turning in over-power violators. <http://www.hallikainen.com/FccRules/2010/22/913/> The ERP of mobile transmitters and auxiliary test transmitters must not exceed 7 Watts. If it's the typical mobile antenna, the official gain is about 5dBi. Drop about 1dB for coax losses, and you have 4dBi gain. 3 watts * 2.51 = 7.54 watts EIRP (close enough). Incidentally, your 12dBi yagi is probably legal, but not with a 3 watt bag phone. The typical modern cell phone belches about 100mw maximum. 0.1 watts * 10^(13/10) = EIRP 0.1 watts * 20 = 2.0 watts EIRP -- Jeff Liebermann jeffl@cruzio.com 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558
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