[TowerTalk] Fw: modeling insulated DE (correction)

[Pete Raymond]

sorry but the file format got messed up
73 Pete N4KW

----- Original Message ----- 
From: "Pete Raymond" <n4kw at infionline.net>
To: <towertalk at contesting.com>
Sent: Sunday, February 18, 2007 3:08 PM
Subject: modeling insulated DE using YO


>I have been attempting to model an insulated driven element (DE) for a 5el 
>Yagi using YO, and not sure if I am using the correct procedure.  The YO 
>manual does not address an insulated driven element.  I am converting from 
>a "T" Match to a Hairpin Match and thus the insulated DE.  I am getting 
>conflicting results for the shorting arm distance which leads me to 
>wondering if there is a problem with my procedure or the software.
>
> After developing the taper schedule for the antenna elements, in the DE 
> line I place a 0 (zero) in the column under the correction factor used for 
> the mounting plate that is used for the remaining elements.
> The DE line now looks like this
>               1.9000    1.2500     1.0000      0.7500    0.500
> 87.945      0.0      30.000     57.000      57.000     60.600
>
> I used a zero as the mounting plate is not taken into account since the DE 
> is insulated from the boom.
>
> Is this the correct method to use when modeling an insulated DE.
>
> 73 Pete N4KW
>