It should be, but the 'rule makers' way-back-when in their infinite wisdom
decided that dipoles were easier for the humdrum public to visualise so
defined ERP as being relative to a perfect dipole.
As it is difficult to make dipoles at high frequencies (actually it is a lot
wasier easier, but... Never mind) ERP there was defined as being relative to
isotropic. So...
Below 1000MHz ERP is defined as being realitive to a dipole, above 1GHz ERP
is defines as being the same as EIRP.
Its just a matter of semantics. I fell into this trap and queried the ERP
limits when 50MHz was first introduced several decades ago. 50MHz requires
EDRP, so the actual maximum RF power could be more than would be needed for
an isotrope.
Andy G4JNT/G8IMR (still lurking)
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of captbrian
Sent: 10 October 2006 03:13
To: [email protected]
Subject: LF: Re: Re: erp eirp - bluff
Then why isn't ERP called EDRP ?
eg EIRP, EMRP, EDRP ......s'obvious innit.?
----- Original Message -----
From: "James Moritz" <[email protected]>
To: <[email protected]>
Sent: 09 October 2006 21:56
Subject: LF: Re: erp ierp - bluff
> Dear Bryan, LF Group,
>
> >< snip >>
> Cheers, Jim Moritz
> 73 de M0BMU
>
> (BTW, it is EIRP, not ierp)
>
>
>
>
> > G3GVB/ Bryan
> >
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