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.

4016353875 - Broad Band Terminated Dipoles (BBTD, T2FD)
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FLEX TUNER GENIUS RFI Kit - SO2R/3 Antenna Option

RFI-AT-FLEX-TG
$89.95
In stock
1
Product Details
MPN: RFI-AT-FLEX-TG or RFI-AT-FLEX-TG3
RFI Suppression Range (MHz): 1-100 MHz

PURPOSE

These kits are designed to choke common mode currents going into or exiting from your Tuner Genius cables. Filters are supplied for the RF Input (s) RF Outputs, DC power and LAN input. The DC power line choke helps keep common mode current out of the power line which could cause interference to other devices connected to the same power line if not suppressed. The LAN cable choke keeps any RFI off the LAN cable input.

USE

RFI-AT-FLEX-TG Standard kit for tuners with SO2R option and RFI-AT-FLEX-TG3 for tuners with 3 antenna outputs option (1X3).

Note if you use other cables into the tuner such as PTT or otherwise, use FSB31-1/2 snap on ferrites for these lines and wind 2 or more turns thru center if possible. These ferrites sold separately.

KIT INCLUDES

Filter Type

Usage

SO2R Kit

3 Antenna Kit

Snap On (1/2” ID)

DC Power

1

1

Snap On (1/2” ID)

Ethernet/LAN input

1

1
FSB31-1
 RF Output
 2
 3
FSB31-1
 RF Input
 2
 1

Total Filters

6

6

INSTALLATION GUIDELINES

SO2R Kit - Part# RFI-AT-FLEX-TG (2 Inputs, 2 Outputs)

RF Output:Snap On Filter (1” ID) – 3 turns (1/2" cable) or 6 turns (1/4" cable) of coax cable through center for each output - Use 1 for channel A and one for channel B Output

RF Input Snap On (1" ID) - 3 turns (1/2" cable) or 6 turns (1/4" cable) of coax cable through center for each input - Use one for channel A and one for channel B Input

Ethernet Cable:Snap On Filter (1/2” ID) – multiple turns through center

DC Power:Snap On Filter (1/2” ID) – 2 or more turns of DC (+ and -) power cord through center

3 Antenna Kit - Part# RFI-AT-FLEX-TG3 (3 Antennas, 1 input)

RF Output:Snap On Filter (1” ID) – 3 turns (1/2" cable) or 6 turns (1/4" cable) of coax cable through center for each output

RF Input Snap On (1" ID) - 3 turns (1/2" cable) or 6 turns (1/4" cable) of coax cable through center for TX input

Ethernet Cable:Snap On Filter (1/2” ID) – multiple turns through center

DC Power:Snap On Filter (1/2” ID) – 2 or more turns of DC (+ and -) power cord through center

Also make sure you connect a good RF ground to the tuner ground post.


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