[TowerTalk] Carolina Windom, etc.

[Gary Schafer]

If it is 1.2:1 at the shack it is also 1.2:1 at the antenna. The impedance
may be transformed but the swr will not be.

73
Gary  K4FMX

> -----Original Message-----
> From: Jim Jarvis [mailto:jimjarvis at optonline.net]
> Sent: Friday, September 07, 2007 10:10 PM
> To: Gary Schafer; towertalk at contesting.com
> Subject: RE: [TowerTalk] Carolina Windom, etc.
> 
> 
> Well, yes, Gary, that's true.
> 
> But suppose it's 1.2:1?  is that because it's 1.2:1 at the
> antenna, or because whatever wierd impedance is presented at the
> feedpoint is transformed to something close to r50 j0?
> 
> Jim/n2ea
> 
> -----Original Message-----
> From: Gary Schafer [mailto:garyschafer at comcast.net]
> Sent: Friday, September 07, 2007 11:00 PM
> To: 'Jim Jarvis'; towertalk at contesting.com; areidmaertz at sio.midco.net
> Subject: RE: [TowerTalk] Carolina Windom, etc.
> 
> 
> 
> 
> >
> > A half wave, more or less in the clear, will radiate
> > just fine.  What you measure as vswr at the shack end of
> > the feedline reflects impedance transformation in the
> > transmission line.  Seeing 1:1 at the end of 500' of line
> > doesn't tell you a damned thing about the antenna match,
> > or system loss.  Nor does 8:1, although that surely raises
> > questions about what's wrong.
> 
> Seeing 1:1 swr at the shack means that the swr at the antenna is also 1:1
> (provided you don't have excessive feedline loss). Swr will be the same
> anywhere on the line.
> 
> 73
> Gary  K4FMX
> 
> 
>