Broad Band Terminated Dipoles (BBTD, T2FD)

Broad Band Terminated Dipoles (BBTD), Tilted Terminated Fold Dipoles (T2FD) and Balanced Termination Folded Dipole BTFD) antennas can be designed to cover a large range of frequencies between 1.8 30 MHz.  Longer length antennas generally provide better low frequency efficiency but take up a larger footprint of land.   One BBTD that has worked well at the AK6R antenna farm is shown below.  Many other designs are available and can be found at www.HFLINK.COM as well as other internet sites.  Your mileage may vary using this antenna, but as a general coverage antenna for ham and shortwave broadcast, the simplicity can’t be beat even though an individual dipole on a specific band may out perform this broad band dipole.  Palomar Engineers has all the parts you need to build this antenna, so why not give it a try?

BBTD at AK6R 1024x726 - Broad Band Terminated Dipoles (BBTD, T2FD)

 

Depending on the source of the antenna design, different value baluns are specified.  Our Bullet(TM) baluns in ratios of 9:1, 12:1 and 16:1 are excellent for this type of antenna as they are broadband from 1.8-61 MHz and will take up to 500 watts PEP.

1033440042 - Broad Band Terminated Dipoles (BBTD, T2FD)
+3

50:800 ohm (16:1) CUBE™ Unun 3-43 MHz - 1KW/2KW PEP

CU-16-1000SS
$129.95
In stock
1
Product Details
Country/Region of Manufacture: Made in USA
Type: Unbalanced output
Input ohms/Output ohms: 50 to 800
Frequency Range < 2:1 SWR (MHz): 1KW: 3-43, 2KW: 3-31
PEP Power Rating (watts): 1000/2000
Insertion Loss (dB): < .2
Input Connector: SO-239
Output Connector(s): Eyebolt
Transformer Topology: broadband binocular core
Hardware Type: Stainless Steel
Enclosure Size: 4" x 4" x 2"
Weight (pounds): 3
Antenna Compatability: end fed

16:1 Ununs are useful between coax and long wires with a load impedance near 800 ohms like a beverage antenna. Shortwave listener antennas also can benefit with the 16:1 unun and it may provide a better match than 9:1 ununs – this means quieter noise levels and stronger signals so you can hear distance stations easier. Output is eyebolt/output on top, ground/counterpoise on side.

Choose 1KW/2KW PEP power option depending on needs.

Custom versions available. 16:1 also available as Balun output.


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Display prices in: USD

Likewise Termination Resistor values vary from 500-1250 ohms and we have a good selection shown HERE: