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Antenna Halo 144 Mhz
The antenna support serves as a coaxial antenna supply line
post 30 Jun 2024
Antenna for UHF VHF Links →
The simplest FM antenna
The J-pole antenna, is a vertical omnidirectional transmitting antenna used in the shortwave frequency bands
ntenna HB9CV 3 elementi 402 MHz
Il guadagno di quest'antenna e' sufficiente per la caccia in fase finale
UHF Portable Yagi AntennaThis four elements Yagi for 430-440Mhz, to use it this summer in portable operation
Diamond F23 Antenna FailureProblem the Diamond F23 antenna to the top of the a small disc ceramic capacitor
2m and 70cm Colinear Flowerpot antenna
Is an end-fed half wave antenna for 2m made from nothing more than RG58 coax and 25mm PVC pipe. With the addition of some tinfoil and sticktape, it can double as a 70cm colinear
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The J-pole antenna, is a vertical omnidirectional transmitting antenna used in the shortwave frequency bands
Il guadagno di quest'antenna e' sufficiente per la caccia in fase finale
Is an end-fed half wave antenna for 2m made from nothing more than RG58 coax and 25mm PVC pipe. With the addition of some tinfoil and sticktape, it can double as a 70cm colinear
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