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

[Kenneth G. Gordon]

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