| Antena MFJ-1779B |
| To jest zwykły jednopasmowy dipol, a tytułowe pasma 80-40m to chwyt reklamowy. Antenę należy przyciąć do długości odpowiadającej pożądanemu pasmu. Wystarczy zajrzeć do manuala: "The MFJ-1779B one-half wavelength, single-band, dipole is a center-fed antenna that can be tuned for operation on any frequency between 80 meters and 40 meters. (3.5-7.3 MHz)" "Decide on the center frequency of operation. The table below has approximate lengths for each band. Column A gives the approximate lengths of the entire antenna. Column B gives the length of each side of the dipole. The lengths can also be determined by using the following formula. This formula will give the length of the ½, wavelength dipole. This must be divided by two in order to get the length of each side of the dipole. 468/frequency (MHz)=1/2 wavelength 3. Attach a coax to the antenna and place it in the desired location. Be sure to leave enough rope so the antenna can be lowered for adjustment. Raise the antenna into is normal operating position using a strong nylon rope. Check Band A B 80 134 ft 67 ft 40 67 ft 34 ft 30 47 ft 24 ft " Bogusław sp7ivo |