Hits 

Shortened 7Mhz Dipole


To construct each side of the antenna proceed as follows. Cut a 10.25 metre length of 24/0.076 insulated wire, and a 160 mm length of 40 mm o.d plastic tubing
post 28 Jan 2024
Shortened 7Mhz Dipole

Antenna 40 Meter Links

75



Dipolo rotativo a caricamento lineare per i 40m
40m 7.150MHz ed ha una larghezza di banda con ROS 1:1.5 di 150KHz, e' realizzato con due canne da pesca in VTR da 7 metri l'una 14 metri totali di dipolo

For 40m I am also working on a 40m 4 Square
Started building a new groundmounted 80m 4 square

Helically wound two element 40 mt yagi
The HW-40 is scaled down to 28 percentof full size

Noise reduction on 40m
Radiation from power lines, data lines and so on in the antenna, I tried to cut into this noise and for this I inserted two common mode inductors in the power line


Take off angle of horizontal antenna

Take off angle of horizontal antenna For horizontal polarization, the electric field will move sideways on a horizontal plane, while for vertical polarization it will oscillate up and down on a vertical plane

A remote antenna switch

A remote antenna switch An abiding dislike for bundles of cables running on the exterior of my house, so a remote antenna switch seemed like a good idea

5 element yagi antenna for 28.5 Mhz

5 element yagi antenna for 28.5 Mhz Gamma match will be made with a 1/2 "aluminum tube and a 75 cm coaxial piece of RG8 without sock and sheath inside the tube