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.
SignalPen(TM)
Our device, in the style of a pen. A portable device that you hold at the end of the pen to detect any RF signal source in close proximity without a battery. It uses RF electromagnetic field as a power source to light up an indicating light. Simple tool/instrument to locate or troubleshoot any RF source from handheld transceiver, mobile radios, or base station and radio repeaters. This device also detects a high voltage AC power line from 15kV and above, also a handy tool for electrician. Just store in shirt pocket like your other pens!
Self-Powered RF Detection Light (No Battery Needed)
Product Dimensions: The size of a pen
Specifications: 60 Hz to 1.2 GHz
For Optional Models: 2.4 to 6 Ghz Min. to Max.
RF Powered Detection: Milliwatts to Kilowatts
Proximity Detection: Wireless: 0.5 in to 3 ft
Capable of in-circuit detection from 20 mW. 30 seconds at 100W
Warranty: 3 years warranty no matter what, except:Intentional breakage and tampering of device
USER MANUAL
Likewise Termination Resistor values vary from 500-1250 ohms and we have a good selection shown HERE: