TopBand: Elevated Radials

[km1h @ juno.com]

On Wed, 18 Mar 98 16:07:29 -0500 John Kaufmann <kaufmann@ll.mit.edu>
writes:
>At 03:38 PM 3/18/98 EST, you wrote:
>>C'mon John....you said nor explained  nothing. 
>>Does NEC-4xx  accurately model on or near ground radials or not?? 
>With
>>your MIT - MITRE involvement I think that you can answer this. 
>>The bottom line for me is...do I want to spend hours dragging out 
>wires
>>for under 1dB improvement...OR can I expect up to 5-6dB for my sweat?
>>
>>
>
>I have no inside information on NEC-4 nor have I used it, so I cannot 
>pretend 
>to answer the question of whether NEC-4 does what you want.  All I am
>saying is
>that the author of the widely used EZNEC software (which is 
>essentially NEC-2 
>with a user-friendly interface) has his doubts about whether the 
>software can 
>correctly model elevated radials, despite what is said in the 
>literature.
>If he 
>doesn't trust it, would you?  

I have not heard him say that....others I will have to discount as
heresay. After all he is fully aware of this reflector and the
discussion. That also does not answer the NEC-4xx questions. 
73  Carl   KM1H




>
>As much as we engineers like to rely on computers (and I'm as "guilty" 
>of
>this as 
>anyone), they are good only if they accurately model what happens it 
>the real 
>world.   In my work, we ultimately verify everything by building or 
>testing
>in the 
>lab or in the field.  When the field data says something different 
>than the
>computer 
>does, then it's time to re-examine the models.  My opinion is that we 
>are
>in that 
>situation now and until it is sorted out, I'm going to stick with lots 
>of
>radials on 
>the ground.
>
>73, John W1FV
>

_____________________________________________________________________
You don't need to buy Internet access to use free Internet e-mail.
Get completely free e-mail from Juno at http://www.juno.com
Or call Juno at (800) 654-JUNO [654-5866]


--
FAQ on WWW:               http://www.contesting.com/topband.html
Submissions:              topband@contesting.com
Administrative requests:  topband-REQUEST@contesting.com
Problems:                 owner-topband@contesting.com