Vs: [HCDX] T2FD dimensions

["Vesa-Jussi Rinkinen" <vesa-jussi.rinkinen@xxxxxxxxxxx>]

Hi Patrick and others,
I built a T2FD a couple of weeks ago and I've been very satisfied with it.
On tropical bands it has proven to be as good as a long wire of 260 metres,
which I use as a reference antenna. In fact I don't see any difference 
between them on tropical bands. Very positive point is that T2FD 
provides a fair audibility on higher frequencies (above 15 MHz) in the 
late night, while with a normal wire antenna those bands are 
usually almost dead.

The dimensions of my antenna are:
>From the feedpoint to the end: 12,13 metres.
Spreaders:  0,747 metres (made of wood, varnished against the weather)
The overall length of the antenna element: 50,0 metres.
Resistor: 390 ohm, 2-watt.

The lowest useable frequency in this application is 4.0 Mhz. After a test
period of two weeks it seems to cover all bands above this fq. On the
90 metre band the noise level is higher. Funny thing is that you can also
pick up some (weak) signals even on medium wave, but so far I could 
not find out the exact radiation pattern for the medium wave band. 

The upper support of my T2FD is at the height of 10 metres 
and the lower one at 2 metres.

Please drop me a line if you need more information.

73's
Vesa-Jussi Rinkinen
Jarvenpaa
FINLAND



> A lot of people on the list seem to use T2FD's, Im curious as to the

>dimensions everyone uses and what bandwidth and performance they get from
>their antennas. Also what termination scheme everyone uses.
>
>Thanks,
>         Patrick
>
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