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Helically wound two element 40 mt yagi
The HW-40 is scaled down to 28 percentof full size
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![Helically wound two element 40 mt yagi](images/cat1824.jpg)
Antenna 40 Meter Links →
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
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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
Started building a new groundmounted 80m 4 square
The HW-40 is scaled down to 28 percentof full size
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
![Antenna switch arduino for icom IC-7300](/../antype/ch45/images/antenna-switch-arduino-for-i-com-ic-7300.jpg)
Antenna switch arduino for icom IC-7300 A solution built around an arduino nano and one of the readily available four relay switching boards