Topband: Matching Transformer

[Joe Subich, W4TV]

> Au contrair!  See work by N6LF, which strongly suggests 
> that there are resonance effects, especially with only 
> a few radials. 

The only resonance effects occur when the radial system is 
insufficient to provide a proper return.  No matter the 
length of the radials, when there are enough radials that 
the spacing between the ends is less than the 0.03 wave 
rule of thumb.  A four or eight radial system is never 
going to behave a non-resonant (on/in ground system).  


> -----Original Message-----
> From: Jim Brown [mailto:jim at audiosystemsgroup.com] 
> Sent: Sunday, December 28, 2008 4:20 PM
> To: lists at subich.com; herbs at surfvi.com
> Cc: AD5VJ Bob; topband at contesting.com
> Subject: RE: Topband: Matching Transformer
> 
> 
> On Sun, 28 Dec 2008 12:27:17 -0500, Joe Subich, W4TV wrote:
> 
> 
> >> Here it is:......a ROG or radial on ground (attached only to
> >> the tower ground) gains some length due to the VF laying on 
> >> earth.....this allows for shorter radials that appear to be 
> >> at RF longer. 
> 
> >Radials on the ground are not resonant.  In that application
> >you don't care about resonance as they are simply a device 
> >for collecting the return currents and increasing conductivity 
> >in the ground.  Quite simply, with on/in ground radials, it is 
> >the area they cover that is important ... not whether they are 
> >resonant. 
> 
> Au contrair!  See work by N6LF, which strongly suggests that there 
> are resonance effects, especially with only a few radials. 
> 
> 73,
> 
> Jim K9YC
> 
>