to calculate the
length of a half-wave dipole antenna:
L= 468/f
L = total length of dipole per band in feet; and
f = frequency in MHz.
Illustrated above is KC6WDK's simple multiband dipole antenna for 80 and 40
meter operation. The 40 meter section also permits use on 15 meters. The
sections are separated by 2' at the far ends of the 40 meter elements. The
antenna is made from scrap lengths of insulated wire with the ends twisted
together. The 50-ohm RG-58 coax is coiled at the feed point to form a broadband
choke balun which prevents antenna currents from flowing back into the
transmission line.
Despite the scrounge-and-improvise construction and although only 12 feet off
the ground, this antenna performs very well.
***HOME***
***RECEIVER***
***Q-MULTIPLIER***
***2-BAND VFO***
***500mW TRANSMITTER***
***3W 2-BAND TRANSMITTER***
***15 METER CONVERTER***
***15 METER VXO-TUNED TRANSMITTER***
***FIELD STRENGTH METER***
***WATTMETER***
***CRYSTAL TESTER***
***SUPPLIERS***