Coil clips can be purchased on our accessories page. Please Note: Coils are not provided with coil clips. The currents inside a piece of coax are equal and opposite so their resultant magnetic fields are also equal, opposite and mostly cancel. The goal of the Choke Balun is to ensure no out of balance energy moves through it. Our TRSB (Triple-Ratio Switch Balun) is an excellent product for these applications (see our accessories section). Many balun designs convert impedances 1:1, 1:2, 1:4, 1:9 and up. In either the vertical (one coil) or dipole (2 coils) configuration it is necessary to use a balun with significant choking impedance to prevent RF feedback. In order to be able to have some tuning flexibility within the band it is recommended to use a small tuner at the transceiver. Our new long telescopic whips accomplish this (see our accessories section).īecause of the high-Q of the coils and the short overall length of the dipole antenna for the low bands, bandwidth is minimized. In the dipole configuration with 2 coils it is recommended to add additional length to the antenna to cover all of the 80m band and to increase bandwidth. Our counterpoise kit (see drop down box below) includes 66' of our teflon-coated, silver-plated copper wire (black color) wound on a kite line winder with brass adapter for quick attachment to the VersaTee. These coils are best utilized for medium DX contacts in a vertical configuration with single sloping counterpoise.
These are the new low band coils which perform on frequencies to 3.5 mhz.
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