Hits
Antenna delta loop 10 metri
Antenna multibanda realizzata con due canne da pesca in fenolico lunghe 7 metri
post 14 Mar 2024
Antenna 10m 28 Mhz Links →
10-Meter Vertical
The length of the vertical wire to 17 ft 4 in and I had a SWR of 1.1 to 1 at 28.200 MHz.I had good SWR of 1.4 from 28.000 to 29.000 MHz
3 Element 28 MHz Yagi
By adjusting the length of the Gamma match and the series capacitor, the VSWR can be adjusted to 1.1:1 at 28.4 MHz
3 element yagi for 28Mhz
Design Frequency: 28.300 MHz, Usable Bandwidth: 600 kHz, Gain: > 7.5 dBi, Front/Back ratio: > 20 dB
3 y 4 Elementos 10 Mts
The macth range has a total length of 70 cm, from the connection point on the coaxial plug, to the end of the range rod
4 Element a V for 10 Mts
Una grande copertura di banda con basso ROS
35
The length of the vertical wire to 17 ft 4 in and I had a SWR of 1.1 to 1 at 28.200 MHz.I had good SWR of 1.4 from 28.000 to 29.000 MHz
By adjusting the length of the Gamma match and the series capacitor, the VSWR can be adjusted to 1.1:1 at 28.4 MHz
Design Frequency: 28.300 MHz, Usable Bandwidth: 600 kHz, Gain: > 7.5 dBi, Front/Back ratio: > 20 dB
The macth range has a total length of 70 cm, from the connection point on the coaxial plug, to the end of the range rod
Una grande copertura di banda con basso ROS
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