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.

1153643678 - Broad Band Terminated Dipoles (BBTD, T2FD)
+3

Icom A120 VHF Aircraft Transceiver RFI Kit - 2 Noise Reduction Filters

RFI-ICOM-A120
$19.95
In stock
1
Product Details
MPN: RFI-ICOM-A120
Type: NEW
Country/Region of Manufacture: United States
Filter Power Rating (PEP watts): = Cable Rating
RFI Suppression Range (MHz): 1-300 MHz
# Ferrite Filters: 2
Enclosure Size (inches): n/a
Typical Use:: DC power, Antenna Coax

BUY THIS KIT NOW TO SOLVE YOUR RFI PROBLEMS! WORKS WITH MANY BRANDS OF COMMERCIAL VHF RADIOS INCLUDING ICOM A120, A220, A220T.

Quick installation - immediate RFI/noise reduction. No radio mods required.

This kit will help reduce or eliminate:

1. Radio Frequency Interference (RFI) to electronic devices including instrumentation and GPS systems.

2. RFI from other electronic devices such as switching power supplies, LED instrument and cockpit lights, battery chargers, GPS and computer systems which generate common mode currents on your radio interface or coaxial antenna feed lines.

3. These filters help reduce SWR problems between transceiver and antenna. The DC power line filter helps keep common mode current out of the power line which could cause interference to other devices connected to the same power source.

These chokes use a ferrite core material that is effective in suppressing RFI from transmitters and receivers experiencing a high noise floor in the 1-300 MHz range.

The ferrite split bead filters are easy to use, don’t require modification of the protected equipment and work in almost all cases, even when plug-in filters fail.

Kit Includes 2 noise reduction split bead (they snap on like a clam shell) filters for coax and AC/DC power/ standard 15 Pin connector cable. 3/4" whole ID - just wrap 2-3 turns of coax cable thru 1 bead and 2-3 turns of the DC power/15 Pin cable thru the other split bead. Does not affect signals carried by the cables, only the common mode interference noise is suppressed.

For additional RFI suppression, use a feed line choke at the antenna feed point to suppress common current on the coax feed line during TRANSMIT and a CMNF-500-50 coax noise filter at the radio end of the coax to reduce common mode noise during RECEIVE.

If you use a linear amplifier use a Palomar Engineers amplifier RFI kit for additional RFI interference suppression.

Visit our website for all your RFI needs!

Note: A120 radio pictured NOT included.

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: