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End Fed Half Wave Antenna Coupler
A dipole can be fed anywhere along its length. A centre feed gives around 70 ohm. A Windom type off centre fed dipole fed 38% along its length provides around a 200 ohm feed. The feed impedance at the very end of a half wave is thousands of ohms, usually somewhere between 2000 ohm to 5000 ohm
post 14 Jun 2024
Antenna End Fed Links →
End fed-Halfe-wave antenna
This type of antenna has same performance as a dipole, but requires only one single mounting point, which makes this concept ideal for portabel stations. Actual bandwith is more than 2 Mhz with VSWR better than 1:1,7
End fed half wave antenna EFHWA
Un solo filo,tagliato alla 1\2 onda della frequenza desiderata,alimentato ad un'estremita'
End-Fed Monobanda
E' consigliato l'uso dei toroidi in polvere di ferro anziche' in ferrite, almeno fino a circa 200-300 watts
End Fed Half Wave Antenna Coupler
A dipole can be fed anywhere along its length. A centre feed gives around 70 ohm. A Windom type off centre fed dipole fed 38% along its length provides around a 200 ohm feed. The feed impedance at the very end of a half wave is thousands of ohms, usually somewhere between 2000 ohm to 5000 ohm
End-Fed Wire Antenna
Ho costruito questa simpatica antenna dopo aver trovato un piccolo toroide cheassomiglia parecchio al T80
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This type of antenna has same performance as a dipole, but requires only one single mounting point, which makes this concept ideal for portabel stations. Actual bandwith is more than 2 Mhz with VSWR better than 1:1,7
Un solo filo,tagliato alla 1\2 onda della frequenza desiderata,alimentato ad un'estremita'
E' consigliato l'uso dei toroidi in polvere di ferro anziche' in ferrite, almeno fino a circa 200-300 watts
A dipole can be fed anywhere along its length. A centre feed gives around 70 ohm. A Windom type off centre fed dipole fed 38% along its length provides around a 200 ohm feed. The feed impedance at the very end of a half wave is thousands of ohms, usually somewhere between 2000 ohm to 5000 ohm
Ho costruito questa simpatica antenna dopo aver trovato un piccolo toroide cheassomiglia parecchio al T80
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