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QRO No Tuner Multiband Dipole
One of the last upgrades to the dipole before experimenting with high-power tuning was to change the 300 ohm window line to 600 ohm ladder line. The higher-Z open-wire lines experience less loss overall, which means that they can operate at higher SWR than the lower-Z lines for a given loss value
post 06 Jun 2024
Antenna Multibands Links →
Antenna multiband 10,20,40mt
Bi-directional radiation perpendicular to the strands of the doublet Impedance from 50 to 75 ohms depending on the angle of the reverse V
Antenna Half Sloper Multiband 1.8, 3.5, 7, 14, 21, 28 MHz
I made about 25,000 QSOs on it mainly in international contests - in 1.8, 3.5, 7, 14, 21, 28 MHz bands. The antenna also works effectively in WARC bands
Antenna multibanda windom
Questa semplice antenna multibanda lavora su tutte le gamme HF, dai 3.5 ai 30 MHz, incluso le bande WARC
Antena Windom pro pasma 160 a 80 metru
Build an antenna for 160 and 80 m no tuner antenna
Antena Dipolo corto sin trampas para 80-40 y 15 Mts
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Bi-directional radiation perpendicular to the strands of the doublet Impedance from 50 to 75 ohms depending on the angle of the reverse V
I made about 25,000 QSOs on it mainly in international contests - in 1.8, 3.5, 7, 14, 21, 28 MHz bands. The antenna also works effectively in WARC bands
Questa semplice antenna multibanda lavora su tutte le gamme HF, dai 3.5 ai 30 MHz, incluso le bande WARC
Build an antenna for 160 and 80 m no tuner antenna
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