Hits
End-Fed Wire Antenna
Ho costruito questa simpatica antenna dopo aver trovato un piccolo toroide cheassomiglia parecchio al T80
post 22 Feb 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
63
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
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