[TowerTalk] Top Hat Calculator

[N6FD]

John is correct, there is an invisible Iframe embedded in the site.  My 
anti-virus software didn't warn me because I have Firefox set up to 
block such things.  I have notified Ari and the 4nec2 user community 
that this is there on the site.  Interestingly the server seems to be 
compromised as the Iframe address I got was for "bigpremiumfind.cn". So 
the site seems to be serving different malware addresses each time.
Thanks again John for the warning.
73,
Erich N6FD

John Kemker wrote:
> Folks, you might want to be careful before visiting this website.  It 
> has a virus/worm called "HTML:Iframe-Inf" which is an exploit to launch 
> invisible frames and distribute malware.  I confirmed this by using a 
> text-based utility called "wget" on a Linux machine, then opened the 
> file retrieved (index.html) with a text editor.  At the bottom is a line 
> that launches the invisible frame, pointing to a website called 
> "michaelsbestway2findalawyer.cn", which is the malware site.
>
> I have reports that some people's anti-virus doesn't report anything 
> bad.  That's why I went to a different machine (a Linux computer) and 
> downloaded the web page in a safe manner.  Visit the website at your own 
> risk.
>
> --JohnK
> 73 de W5NNH
> 10X 75371/M&M 117/SMIRK 6185/Six Club 285/TRA 2499/Norcross 228 F&AM
>
>
>
>
> N6FD wrote:
>   
>> I don't know of any specific calculator for top hat capacitance, but you 
>> should be able to model it easily in 4nec2.  Its free and available 
>> here: http://home.ict.nl/~arivoors/ <http://home.ict.nl/%7Earivoors/>  
>> It has proven to be accurate in comparison to both textbook examples and 
>> my real life antennas.
>> 73,
>> Erich N6FD
>>
>> Marc Willis wrote:
>>   
>>     
>>> Does anyone know if there is a top hat calculator out there? Appreciate the
>>> help Marc NC7M
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