Flower Pot Antenna Calculator
Brass terminal block to support the weight of the antenna against a section of cutting board made as a mounting block. Half Wave Flower Pot Antenna Vk2zoi - Sch40 pvc has a different velocity factor to grey upvc and as such my antenna needed some pruning.
Linear Loaded Short Dipole Klaus Lita Linear Radio Antenna Ham Radio
2m flower pot antenna center frequency 145250 MHz.
Flower pot antenna calculator. John replied quickly with three detailed articles about his antenna and extracted a. The flower pot antenna IS a half wave dipole and is center fed just as the 12 wave dipole shown in the video. Start by removing the braid from the top section exposing the inner conductor.
RigExpert 600 MHz Antenna Analyser VSWR results. Flower Pot Antenna a Dual-Band 20m and 10m portable Antenna. VSWR Plot 136 to 156 MHz.
Flower Pot RF Choke. Leave the dielectric insulator. Wawasan Tentang Elektronika Half-Wave Flower Pot Antenna The diagram below shows the basic arrangement of the 2m Half-Wave version of the antenna.
I saw the VK2ZOI Flower-Pot Antenna mentioned on the ARNSW website so I wrote to John Bishop and asked for his documentation on the antenna. The Single 58 version of the Flower Pot simply substitutes a 58 wave-length section for the top quarter wave of the basic half wave antenna design. The 58λ radiator uses a 02λ shorted co-ax phasing stub to resonate the 58λ element.
Here is a link to his webpage with instructions for making several of his designs. It had been about 10 years since I used 2 metres actively. 1920x1080 px Nomons Flower Pot Antenna Calculator - Ham radio antenna the flower pot antenna a stealth antenna that you can hide in a plant pot dual band high gain flower pot antenna.
You will note the bottom half braid section of the coaxial dipole antenna is considerably shorter than a 14 wave length most likely due the velocity factor of the cable. VSWR Plot 142 to 150 MHz. Inner conductor 455 mm and braid section 445 mm.
David G6ENN enjoys cycling so decided to try push bike mobile with a Flower Pot Antenna. Its a portable dual-band antenna working principally on 10 meters but also close to the 30 meter band. Heres a link if you want construction details of the two metre version.
A flowerpot few meters of rg58 cable and a variable capacitor. Here we do not count the number of turns because it will vary depending on the diameter of the PVC pipe used to wind the cable. Ive found a.
Flower Pot Antenna. Half of the FPA dipole is the 14 wave wire center conductor of the coax the other half of the dipole is the 14 wave of coax shield. 6M10M Dual-Band Mobile Antenna Ideas.
145MHz x 3 435MHz thats 2M to 70cm or VHF to UHF The modification involves placing a coax phasing sleeve of aluminium foil around the outside of conduit. First construct the 2M antenna then. TV Parts Shortwave Listeners Antenna for a portable AMFM Shortwave Radios.
Single 58 Flower Pot Antenna Substitutes a 58 wave-length section for the top quarter wave of the basic half wave antenna design. If you would like to repeat my experiment you will first need a big plastic flower pot around 70cm high 60 top diameter and 30 cm base diameter. I figured it was time to get back into the band.
David G6ENN has been busy building a 6m Half Wave Endfed. They are end fed coaxial dipoles with an interesting design to make them dual band and colinear for increased gain. A few years ago a made one of VK2ZOIs dual band flowerpot antennas.
Nomons Flower Pot Antenna Calculator - For example how the current flow to form a radiation. First results encouraging with David working through GB3UM and hearing the Beacon GB3BAA on 50016 MHZ. To construct the antenna first select a suitable length of grey 25mm conduit as a minimum 1m but if you make it longer you will have more room below the coil to attach to your antenna support.
Dual Band 2m 70cm Pvc Antenna Resource Detail The Dxzone Com - Film prezentujacy wykonanie anteny wg projektu vk2zoi. Half Wave Flower Pot Antenna Vk2zoi - Ham radio antenna the flower pot antenna a stealth antenna. Flower Pot 2 metre aerial.
Double 58 Flower Pot Antenna Extension of the Single 58 and uses a 58λ element for both the top and bottom radiators. Its compact light economical and doesnt need any radial. This one weighs 80 grams and is more compact.
I was surprised how well it worked and a few others tried it and found it worked very well. VSWR Plot 126 to 166 MHz. G4NSJ - Flowerpot coaxial dipole antenna.
9 turn choke on a 27 mm diameter form. An interesting point is to compare the lengths specified by John against the formula for a 14 wave element at 52 MHz 1370 mm long 30052 x 095 x 025 137metres. Its an ongoing experiment but so far seems to work well.
That includes the upper radiator lower radiator also the length of the cable that will be wound on the PVC pipe. 6m Flower Pot Antenna. The picture above is Davids Static mobile setup.
Kenwood TH-D7AG Dual-Band DATA HT. The video below shows the construction of a coaxial dipole for the aircraft band. 2m 144 MHz coaxial dipole or known elsewhere as a flower pot antenna.
The arrangement is shown in the sketch below. Six metre coax antenna The original flowerpot antenna weighed 255 grams. This calculator is used to determine the length of each element of the flower pot antenna.
The half wave 2M version of the Flower Pot antenna is easily modified to a dual band antenna for operation on a band that is the approximate third harmonic of the fundamental resonance. On the other hand if you prefer the antenna to be centered at 1462 MHz change the element lengths to 450 mm top section and.
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