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 is a generic linear amplifier RFI kit for AC powered amplifiers. Works on many popular amplifiers including:
ACOM 600, 1000, 1500, 2000, etc - all models
ALPHA models – all AC models including 76, 77, 78, 86, 87A, 89, 91B, 99, 274, 374, 8100, 8406, 8410, 9500
AMERITRON models – all AC models including AL80A, AL80B, AL82B, AL572, AL800, AL800H, AL811, AL811H, AL1200
HEATHKIT models – all AC models including SB200, SB201, SB220, SB221, SB230, HA10, HL2200, SB1000
HENRY RADIO models – all AC models including 1K, 2K, 3K, 4K, 5K, 8K
KENWOOD models – all AC models including TL922, TL922A
DENTRON - all models
All AC powered rigs like B&W, Collins, Command, Dentron, Drake, Gonset, Hallicrafters, Hammarlund, Hunter, Icom, Palomar, Palstar, QRO, SBE, Swan, Tokyo Hy-Power, Yaesu and many military and commercial HF amplifiers.
Included are the following chokes and installation guidelines:
RF Input: F240 toroid – 5-9 turns of RG-58 size coax through center
RF Output: FSB-1 (Big Clamp on) – 3 turns of RG-8 size cable
Relay Cable: FSB-1/2 – multiple turns through choke – ½” diameter hole
AC Power Line: FSB-1 (Big Clamp on) – 3 turns through center
Likewise Termination Resistor values vary from 500-1250 ohms and we have a good selection shown HERE: