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.

3567247745 - Broad Band Terminated Dipoles (BBTD, T2FD)
+3

FLEX PGXL Linear Amplifier RFI Kit - Single/Dual I/O Options

RFI-LA-FLEX-1
$59.95
In stock
1
Product Details
MPN: RFI-LA-FLEX-1 or RFI-LA-FLEX-2
RFI Suppression Range (MHz): 1-100 MHz

PURPOSE

These kits are designed to choke common mode currents going into or exiting from your amplifier cables.Filters are supplied for the RF In, RF Out, Relay Cable/control lines, and AC power line.Use of the filters often helps cure SWR problems between amp exciter and amp and between amp and antenna tuner or direct to antenna.The AC 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.

USE

Standard kit for amplifiers with single input, single output, relay keying and AC input

Deluxe Kit for amplifiers with dual inputs/outputs, frequency/keying control lines

KIT INCLUDES

Filter Type

Usage

Standard Kit

Deluxe kit

F240 Ring (1.4” ID)

RF Exciter input

1

2

Snap On (1/2” ID)

Ethernet, PTT control

2

2

Snap On (1” ID)

RF Output

1

2

Snap On (1” ID)

120/240 VAC Input

1

1

Total Filters

5

7

INSTALLATION GUIDELINES

Standard Kit - Part# RFI-LA-FLEX-1

RF Input:Ring Filter (1.4” ID) – 5-9 turns of RG-58/8X size through center

RF Output:Snap On Filter (1” ID) – 3 turns of coax cable through center

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

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

AC Power:Snap On Filter (1” ID) – 3 turns of power cord through center

Deluxe Kit - Part# RFI-LA-FLEX-2

RF Input (2)Ring Filter (1.4” ID) – 5-9 turns of RG-58/8X size through center

RF Output: (2)Snap On Filter (1” ID) – 3 turns of coax cable through center

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

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

AC Power:Snap On Filter (1” ID) – 3 turns of power cord through center

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

Save this product for later
Display prices in: USD

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