XPost: sci.military.naval, sci.space.shuttle, alt.conspiracy
XPost: sci.astro.amateur
Richard Casady drukte met precisie uit :
> On Fri, 12 Sep 2008 19:17:37 +0200, "Roger Conroy"
> wrote:
>
>>
>> "Richard Casady" wrote in message
>> news:48cd90c4.200892515@news.east.earthlink.net...
>>> On 23 Jun 2003 16:43:39 -0700, elisabeth00eder@hotmail.com (Elisabeth
>>> Eder) wrote:
>>>
>>>> The antenna is currently being configured to transmit BILLIONS of
>>>> watts [gigawatts] of microwave radio frequency energy
>>>
>>> Where are they getting the 13 000 000 HP to turn the generators?25 or
>>> so really big power plants? I don't think so?
>>
>> Richard
>> You forgot to factor in antenna gain.
>> The final RF stage output power is 3600kW; the antenna array gain is 31dB
>> which results in an ERP of 3981MW.
>
> The word was transmitt. The transmission is from the power source to
> the atmosphere. Nothing was said about beam density, it was
> transmitter output. Before the antenna, not after. No array is going
> to manufacture power from nothing. A watt is a unit of power, not
> intensity.ERP is pure fiction when discussing transmitter power which
> is always less than the ammount of electricity used. An antenna will
> not radiate more power than leaves the transmitter.
The antenna gain mentioned is from a directional antenna (a dipole,
reflector and director) a.k.a. Yagi. The 'antenna'-gain is compared to
an isotrope-antenna. The RF energy is not actually amplified, but
directed in one particular direction. This is also called 'gain'.
ERP also means 'Effective Radiated Power' (or something similar)
>
> BTW, it all ends up in the ionesphere whether the area thereof is
> large or small. You are attempting to overstate the ammount by a
> factor of 1000. Not one word was said about intensity, it, it was raw
> power. The kind that shows up on the electric bill.
>
> Casady
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