[R-390] Antenna...folded dipole...

Tue, 16 Dec 2003 09:47:20 -0600

Well it looks like you guys had already figured this out....I am just a few
days behind on my email...

Sorry about that!

Cecil...
----- Original Message ----- 
From: "Cecil Acuff" <[email protected]>
To: "Kenneth G. Gordon" <[email protected]>; "Dave Faria"
<[email protected]>
Cc: <[email protected]>
Sent: Tuesday, December 16, 2003 9:40 AM
Subject: Re: [R-390] Antenna...folded dipole...

> Maybe he's building a T2FD....doesn't it use a terminating resistor...and
if
> it is to be used for transmitting as well it may need to be of a large
> wattage?
>
> Just reading between the lines a bit...may be waaaay off base!
>
> Cecil....
> ----- Original Message ----- 
> From: "Kenneth G. Gordon" <[email protected]>
> To: "Dave Faria" <[email protected]>
> Cc: <[email protected]>
> Sent: Monday, December 15, 2003 5:08 PM
> Subject: Re: [R-390] Antenna...folded dipole...
>
>
> > On 15 Dec 2003 at 10:56, Dave Faria wrote:
> >
> > > GM list.  I want to build a Folded Dipole antenna for my station.  I
> > > can wind the balun but, cannot find a suitable terminating resistor.
> > > Can anyone point me to a source for a non-inductive 400ohm or 800ohm
> > > resistor 300 watt??  I can build a combination of resistors to meet
> > > the resistance and wattage if necessary.
> >
> > No folded dipole I have ever seen in antenna books or other
> > literature, or that I have built, ever needed a terminating
> > resistor. If you plan to use this antenna with an R-390, my
> > understanding is that the R-390's input impedance is already
> > 300 ohms, balanced, and a properly built folded-dipole exhibits
> > 300 ohms impedance, balanced, at the resonant frequency.
> >
> > Of course, the folded dipole is resonant only around one
> > frequency or band, so you would have to have several
> > depending on what bands you intend to listen to.
> >
> > Terminating resistors are only needed for antennas such as
> > rhombics, Beverages (sp?),  and the like, not for a folded-dipole.
> >
> > Ken Gordon W7EKB
> > _______________________________________________
> > R-390 mailing list
> > [email protected]
> > http://mailman.qth.net/mailman/listinfo/r-390
>
>
> _______________________________________________
> R-390 mailing list
> [email protected]
> http://mailman.qth.net/mailman/listinfo/r-390
>