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Endfed per 17-20-30-40 metri
Una veloce multibanda E.F.W.H.A. dedicata ai piccoli quadri banda come il mio FT857D
post 16 Jun 2024
Antenna End Fed Links →
The J-Pole or Half-Wave Zepp Antenna
The Half-Wave Zepp is an end-fed half-wave antenna. That is, it is a piece of wire one-half wavelength long with the feedline connected at one end
The versatile end-fed wire
A length of one quarter wavelength ie 20 metres on the 80 metre band is commonly suggested. Though such antennas do work, an extensive ground system or counterpoise is required for best performance
End fed portable
Questa e' un'antenna filare End Fed lunga 16,2 metri e alimentata tramite un trasformatore a toroide UNUN con rapporto 9:1
End fed 6 - 40 Meter Multiband HF Antenna
End fed HF antenna The end fed feature adds portable convenience, but does present another issue.The problem with an end fed half wave antenna is that the antenna presents high impedance
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The Half-Wave Zepp is an end-fed half-wave antenna. That is, it is a piece of wire one-half wavelength long with the feedline connected at one end
A length of one quarter wavelength ie 20 metres on the 80 metre band is commonly suggested. Though such antennas do work, an extensive ground system or counterpoise is required for best performance
Questa e' un'antenna filare End Fed lunga 16,2 metri e alimentata tramite un trasformatore a toroide UNUN con rapporto 9:1
End fed HF antenna The end fed feature adds portable convenience, but does present another issue.The problem with an end fed half wave antenna is that the antenna presents high impedance
PIC-Keyer This project describes the construction of a real "QRP" keyer with a small microcontroller PIC 16F84, with slightly modified hardware also PIC16F62
RF Inductance Calculator Mean diameter of the air core coil, measured from conductor centre to conductor centre include the wire insulation thickness, if any
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