LF: Re: 500 ERP calculation Spreadsheet

["Gary - G4WGT" <g4wgt@tiscali.co.uk>]

Hi Alan,

I have downloaded the new version ERP2 & it will not run correctly with my 
MS EXCEL, also tried to open it on the web site & still no joy, my previous 
version on my PC still runs OK.
73

Gary - G4WGT - IO83qp

----- Original Message ----- 
From: "Alan Melia" <alan.melia@btinternet.com>
To: <rsgb_lf_group@blacksheep.org>
Sent: Sunday, April 29, 2007 6:33 PM
Subject: LF: 500 ERP calculation Spreadsheet


> Hi All, this geriatric ol' twit made another mistake !! Thanks to Peter
> G3VVT who bother to check my answers again Kraus ( I cant argue against 
> that
> !!) another small error has surfaced. It is to do with the "form-factor"
> which should have been squared because it refers to the real height of the
> vertical which is squared in the equation for Radiation Resistance. As it
> happens it make a very small difference to most people who have a top 
> length
> of equal or greater than the height because then the FF is close to unity
> ( and unity squared is unity !!) However I did issue another sheet to a 
> few
> who were working with no top load, it is on aerials like this the error is
> most relevant. Fortunately it reduces the Radiation resistance and allow 
> you
> to run even more aerial current before exceeding the -10dBW !! The new
> version is now loaded to my web site
> http://www.btinternet.com/~alan.melia/programs.htm
> And I will add a reference to enable the other version (ERP2.xls) to be
> downloaded.
>
> Sorry pardon, just crank the current up a bit !!
> Cheers de Alan G3NYK