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How many radials does the
vertical antenna really need?
Another common question is Does it matter if I lay the radi-als on the ground surface instead of burying them? This is a practical consideration because it's often much easier to lay out the radials on the surface
post 14 Oct 2024
Antenna Vertical Links →
A Modified Petlowany Antenna
It is essentially a very short dipole with spiral-wound coils at each end
Antena vertical
Outside of the wave traps there is nothing difficult in the construction of this antenna; the traps are of homemade construction and we will use a simple ingenuity to make them
Vertikal Dipole 10-40m
The modelled inverted-V antenna is full size and will have a higher efficiency than a shortened horizontal dipole. If we consider a full size 1/4 wavelength
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It is essentially a very short dipole with spiral-wound coils at each end
Outside of the wave traps there is nothing difficult in the construction of this antenna; the traps are of homemade construction and we will use a simple ingenuity to make them
The modelled inverted-V antenna is full size and will have a higher efficiency than a shortened horizontal dipole. If we consider a full size 1/4 wavelength
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
Voice Recorder Gestito dall'integrato in questione ed offre la possibilità di registrare più messaggi per una durata massima di un minuto con buona fedeltà di riproduzione