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Double 5/8 Flower Pot Antenna
Constructing the antenna using RG59 75 OHM solid dielectric cable and bringing the feed co-axially down through the bottom element as below
post 12 Jun 2024
Antenna for UHF VHF Links →
Antenne halo 144MHz
The antenna support serves as a coaxial antenna supply line
Antenne pour le portable 145mhz
Antenna squelette (skeleton) is neither more nor less than a QUAD antenna, except that in our case it is rectangular
Antenne slim jim 144mhz
Given its very average rigidity it will advantageously be suspended from a polyamide cord stretched between two supports a few meters rom the ground, the feeder coaxial RG 58 freely
Half-Wave Flower Pot Antenna
The 2m Half-Wave version of the antenna. To construct the antenna, first select a suitable length of grey 25mm
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The antenna support serves as a coaxial antenna supply line
Antenna squelette (skeleton) is neither more nor less than a QUAD antenna, except that in our case it is rectangular
Given its very average rigidity it will advantageously be suspended from a polyamide cord stretched between two supports a few meters rom the ground, the feeder coaxial RG 58 freely
The 2m Half-Wave version of the antenna. To construct the antenna, first select a suitable length of grey 25mm
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