Feeder Radiation
When you connect centre fed antennas, like dipoles, Vs, triangles, yagis, rhombics, loops and so on, to coaxial cable, unless care is taken, it is not difficult to end up with feeder radiation.
Category Archives: Articles
Here you can find articles I’ve cached, that are no more available in the net or are very rare to be found. Where possible credit will be given to authors.
Folding the Dipole Antenna
About folded dipole antennas
Magnetic Longwire Baluns
Do these things do exactly what they say they do – or are they total hogwash? Have you seen the ads? This device will match your long wire to your receivers 50 ohm input? Firstly a long wire on HF would be on 28 MHz longer than 120 foot and on the lower bands it just
160m Antenna – Inverted L
Another antenna added from the antenna plan is a 160 meter ¼ wavelength inverted L. A 130 foot length of 12 gauge PVC covered stranded wire slopes up from the ground system to the 40 foot level of the 45 foot tall fiberglass flagpole (about 60 feet of wire length) and then proceeds about 70
The gamma match
The Gamma match is the most used matching device used for yagi beams. What it does is: A Yagi almost never has an impedance of 50 ohms. In other chapters i told that Gain, bandwith, F/B etc. all relate to eachother these figures are never all high at one point. A well designed yagi has
Kenwood KPG-46 programming cable
Kenwood KPG-46 Programming Cable Suitable for the following radios: Kenwood TK-71 TK-81 serie Kenwood TK-7302 / TK-8302 NX-700 de Kenwood / NX-800 Series Kenwood TM-271E Component List: C1 470?f 16v. C2 47?f 16v. C3 a C6 10?f 16v. IC1 MAX 232. REG1 78L05.
Windom Antenna 10-80
A windom antenna for 10 to 80 meters band – a design by PU1LHP
A 40m Vertical Antenna
A Vertical Antenna for 7 HMz
DX Century Club First post-WWII Countries List
Postwar Countries List Official List for ARRL DX Contest and the Postwar DXCC From QST, February 1947, pp. 49 – 50 MANY of the DX men have been at a loss to appraise accurately their postwar DX accomplishments because the last revised Countries List was made up back in 1939 and, since that time, many
Coaxial Dipole Antenna by WB4CPO
A coax atenna project by WB4CPO from the late 80s that can be considered a double bazooka antenna. Type of coax needed — RC 58/U or RC 8/U. RC 58/U is the best. Use the same type coax for antenna and feed line. Maxium legal power can be used on the RG 58/U without fear