Re: T2FD THE FORGOTTEN ANT.

Monday, February 28 2005

He's referring to my article on the T2FD (Tilted, Terminated Folded Dipole)
on the hard-core-dx.com site:
http://www.hard-core-dx.com/nordicdx/antenna/wire/t2fd.html

This is a tried-and-true nonresonant antenna design, known for its low noise
receiving characteristics and even impedance over a wide frequency range.
The resistor (opposite the feedpoint) is a critical component for achieving
good results with the T2FD. Some have called the T2FD a "squashed
rhombic"... another antenna design that includes a resistor to operate
properly. The popular Beverage antennas (such as I use these days) also need
a terminating resistance if you want to reduce signals and QRM off the back
side.

There is a Barker & Williamson (B&W) commercial version of this antenna
suitable for transmitting, and it is rated 2kw PEP. The cost is around $ 350
US, and it is suitable for 1.8 to 54 MHz use. See:
http://www.bwantennas.com/ama/fdipole.ama.htm I don't know what B&W has
done to achieve a patent on this, but it is essentially a T2FD antenna.

Guy Atkins
Puyallup, WA USA


> -----Original Message-----
> From: J999w/at/aol.com
>Re: T2FD THE FORGOTTEN ANT.
> dipole. I want to purchase them that will be heavy enoug for use with a linier amp. /jerry
>
> Resistors in an antenna?
> That doesn't sound good.
>
> jw, k9rzz


Adding to Guy Atkin's reply you might also wish to study antennas such as
the K9AY, EWE, Flag/Pennant, and KAZ.
Granted, they are primarily used for reception (which is what HCDX deals with), but some
radio amateurs have tried, and are trying, to use some of these for transmitting. Cebik
is partly dealing with this on his site:
http://www.cebik.com/wire/t2fd.html
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Hermod Pedersen, HCDX Web Editor