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Antena for 40 and 80 meters type W3DZZ
I had a dipole for 40 meters in inverted V, with twice 10.25 meters of 2.5 mm2 copper wire in section. I decided to transform it into a W3DZZ to be able to work also in 80 meters
post 28 Mar 2024
Antenna Multibands Links →
A Co-ax Trap Dipole For 40, 30 and 20 Meters
Another way to minimise the loss of an antenna using coax traps is to use the minimum length of coax needed to achieve resonance
Antena morgain 40/80M
This antenna reduced dimensions for 80 and 40 Meters
Antena dipolo Multibanda
This dipole antenna functions as a half wave dipole in the 40 and 20m bands. In the 80m band it is a shortened dipole and in the 15m band it is a 3/4 wave dipole when the 40m 7Mhz thread resonates at 15m 21MHz
Antenna tipo G5RV
L'antenna e' alimentabile anche con linea bifilare TV da 300 ohm, ma e' preferibile che l'alimentazione avvenga per il tramite uno stub in linea aperta
El Dipolo G5RV
The G5RV antenna is expected to be the most popular among fans. Maybe because of the characteristic of being able to work in different bands
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Another way to minimise the loss of an antenna using coax traps is to use the minimum length of coax needed to achieve resonance
This antenna reduced dimensions for 80 and 40 Meters
This dipole antenna functions as a half wave dipole in the 40 and 20m bands. In the 80m band it is a shortened dipole and in the 15m band it is a 3/4 wave dipole when the 40m 7Mhz thread resonates at 15m 21MHz
L'antenna e' alimentabile anche con linea bifilare TV da 300 ohm, ma e' preferibile che l'alimentazione avvenga per il tramite uno stub in linea aperta
The G5RV antenna is expected to be the most popular among fans. Maybe because of the characteristic of being able to work in different bands
23cm Yagi Antenna building Finished antenna at 1275 MHz SWR under 1:1.5 at resonant frequency
50 MHz preamp Gain 26dB with the BFG135 Preamps for 144 and 430 MHz, for 50 MHz, the BFG135a is a cheap transistor and in my view rather strong. It is not easily damaged by static discharge or RF power. FG connection
30 Volt Computer Power Supply Stack A bonus was that i discovered that these did not need a standby load connected to the supply to keep them running just apply mains power and close the Start lead to ground