TRAP-dipole - the W3DZZ antenna for 40 and 80 meter band - updated nov. 2010
HOW TO....
Before you start, bee sure
that you know exactly where you would hang the dipol.
I hang it in the tower up 9 meter, and the ends is inverted to about 4,5 meter
over ground
with an angel
about 140 Deg. in feedingpoint.
I have added a BALUN in the feedingpoint to match 50 Ohm's COAX-feeder.
Feb. 2011: I made TRAPS to extent the antenne with 160 meter band.
Makinge the TRAP's
Resonans on Homemade SpectrumAnalyser:
A clean HI-Q COAX-resonator made after the program: Coaxial Trap Design, by Tony Field (VE6YP), (582 Kbytes)
Freq.Marker:
7.05 MHz
GRID:
10 db / 50 KHz div.
Measuring VSWR at 3.6 MHz
CALIBRATING the Cable:
Measuring
the TRAP-Dipole:
|
Measuring VSWR at 7.0 MHz
CALIBRATING the Cable:
Measuring
the TRAP-Dipole:
|
|
Good Luck
VY 73 de OZ6YM, Palle