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?
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.
This RFI kit was created to suppress RFI issues with your cable tv box interference. This kit was created out of necessity from a ham using high power antennas near the cable TV box. The use of the ferrite filters completely eliminated the RFI issue allowing the ham to enjoy the use of the cable TV system while using the ham radio system.
The ferrite filters are selected to suppress RFI from 1 to 300 MHz. The filters are easy to install, don’t require modification of the protected equipment and work in almost all cases. See product picture for suggested filter use.
What is included in the kit?
The RFI-CABLETV kit contains a snap on filter for the AC power cord, the HDMI/Video output cable and the and coax cable TV input cable.
You get three 1/2" ID snap on RFI filters and an installation manual.
You need 1 RFI-CABLETV RFI kit for each cable TV box afflicted with RFI.
For additional protection of the video monitor use the RFI-HDTV RFI kit which suppresses RFI coming into the AC power line into the HDTV.
Likewise Termination Resistor values vary from 500-1250 ohms and we have a good selection shown HERE: