Palomar Engineers Fan Dipole kit for 80 and 40 meters. Choose 500, 1500 or 5000 watts PEP option. 135 feet wide for 80 meters and 66 feet wide for 40 meters. For best results install so end are 5 feet apart and as high as possible.
Dipole wire kits come assembled to selected balun - just add coax and raise with paracord and use our pulleys for ease of installation. Keep each dipole end approximately 36 inches minimum apart if possible. Adjust 80 meter length first and then 40 meter length as there will be some interaction with each other.
You can also add additional option dipole kits. Just add to cart in addition to this antenna. Be sure to space ends 3-5 feet away from the other dipoles. Tune the lowest frequency first, then next highest, etc.
If you want different band combinations, choose the dipole wire kits needed and then select the Bullet-1B-500, CB-1-150EB or CB-1-5000EB for 500/1500/5000 watts rating.
You can have more than 2 bands on a fan dipole, just select an additional band using our convenient Dipole Wire Kits!
A simple ferrite ring filter on the DC power line can help suppress the RFI noise affecting the victim device or keep the DC power cord from acting as an antenna and radiating RFI into other victim devices. This kit is also useful on laptop computer supplies, routers, cable modems, wireless phone charges, etc.
Installation is quick and easy: Just wrap the DC power cord through the center of the ring filter as many times as you can and reinstall. For best results with long DC power lines, use one at the ring filter at the wall wart end (to prevent the wall wart power supply from using the DC line as an antenna) and another at the DC plug end (to prevent the electronics in the powered device from using the DC power cord as an antenna). Typical installation is shown below:
The filter suppresses RFI in from .1-100 MHz. Inside diameter is 3/4 inch/19 mm.
Since most households and office environments have multiple wall warts we offer the Wall Wart RFI Filter kit in bulk quantity packages.
Known RFI Generators include Roku/Sling-TV power adapter - Interference heard in the AM broadcast band and harmonics. Also many ethernet Cable/DSL modems, cell phone chargers, computer power adapters have the same issue: using the AC or DC side of the power supply as a radiating antenna. RFI solution is to use a linear power supply, change adapters or wall wart ferrite filters