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.

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Chameleon Antenna Tuner CHA URT1, 1.8-54 MHz, 16K memories, 125W SSB, POTA, SOTA

SKU CHA URT1
$399.00
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Chameleon Antenna Tuner CHA URT1, 1.8-54 MHz, 16K memories, 125W SSB, POTA, SOTA
Product Details

CHA URT1 (Universal Remote Tuner 1)

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The CHA URT1 is a remote outdoor tuner for almost any type of antenna and any brand or model transceiver. The CHA URT1 is unique in that it can be used for coaxial cable or wire fed antennas. This wide-range tuner will match wire antennas, such as a vertical, random wire antenna, or a long wire antenna. It can also be used with coaxial-fed antennas, like an Inverted “V” or dipole. Also, the CHA URT1 does not need a transceiver-specific control cable, so it works with any brand or model of transceiver. The rugged Tuner Unit is weatherproof and designed to be permanently installed outdoors at or near the antenna feed point, so loss due to high SWR on the feedline is avoided.

The CHA URT1 covers 1.8 – 54.0 MHz and has 16,000 memories for quick recall and tuning with previously used settings. It can match any antenna with an impedance of 5 to 1,500 Ohms within seconds and can handle up to 125W SSB Phone & CW, 100W SSB Phone & CW on 50 MHz, 60W all other modes (see specifications). The CHA URT1 consists of two units: a Coupler Unit and the Tuner Unit. The Tuner Unit is in a rugged weatherproof housing and contains the antenna matching network and controller. It is normally installed outside at or near the antenna feed point. The Coupler Unit contains the operator controls and status indicators. It uses a bias-T circuit to send power and control signals to the remote Tuner Unit over the connecting coaxial cable, so there is no need to order or install a separate transceiver-specific control cable. The Coupler Unit is not weatherproof and must be installed inside near the operator and transceiver.

IF YOU'RE INSTALLING A LIGHTNING ARRESTOR INLINE WITH THE CHA URT1 YOU'VE TO USE: Morgan RF Systems M-303U-PP coaxial arrestor

Our tuners use latching relays. Once the tuner is tuned the relay's latch and power is turned off. It saves on battery drain. The tuned frequency will be stored in memory. When you change frequency or bands you need to apply power and energize the tuning process again. If the frequency is in memory the tuning process will be quick!

WE RECOMMEND TO INSTALL A RFI CHOKE SUCH AS THE MC-1-500 AT THE FEED POINT OF THE TUNER.

Consist of:

1 X Universal Remote Tuner 1

1 X Coupler Unit

1 X 12V Hardwire Power Cord

2 X U-Bolt Attachment Brackets and Hardware

2 X U-Bolt(1/4" x 1-3/4" x 3")



Specifications

  • Frequency Range: 1.8 to 54.0 MHz
  • Power Handling:
  • HF: 125W SSB/CW
  • 6M: 100W SSB/CW
  • All other modes: 60W
  • Tuning Power Range: 0.5 - 15W
  • Tuning Time: 5 seconds for full tune: 0.1 Second for memory tune.
  • Memory: 16,000 frequencies
  • Power Supply: 12-14 DC, 1A
  • Temperature Range: Approximately 14°F (-10°C) to 140°F (60°C)
  • Turner Unit Dimensions: 8.8 X 5.1 X 1.8 inches (223mm X 130mm X 45mm)
  • Tuner Unit Weight: 38.8 oz (1100g)
  • Coupler Unit Dimensions: 5.0 X 4.1 X 7 inches (128mm X 105mm X 43mm)
  • Coupler Unit Weight: 14.1 oz (400g)
  • Current consumption: 500mA or less
  • Magnetic latching relay. Once the tuner is tuned the relay's latch and power is turned off. It saves on battery drain. The tuned frequency will be stored in memory. When you change frequency or bands you need to apply power and energize the tuning process again. If the frequency is in memory the tuning process will be quick !

Optional:

1 X 12V power supply

1 X 3ft of 50 Ohm stranded center conductor RG-8X with PL-259 Connectors

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