Flower Pot Antenna Calculator

May 31, 2021 Post a Comment

A flowerpot few meters of rg58 cable and a variable capacitor. Brass terminal block to support the weight of the antenna against a section of cutting board made as a mounting block.

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Start by removing the braid from the top section exposing the inner conductor.

Flower pot antenna calculator. TV Parts Shortwave Listeners Antenna for a portable AMFM Shortwave Radios. I figured it was time to get back into the band. Flower Pot Antenna a Dual-Band 20m and 10m portable Antenna.

Its an ongoing experiment but so far seems to work well. 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. 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.

VSWR Plot 126 to 166 MHz. This calculator is used to determine the length of each element of the flower pot 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.

6m Flower Pot Antenna. 2m flower pot antenna center frequency 145250 MHz. 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.

First construct the 2M antenna then. Single 58 Flower Pot Antenna Substitutes a 58 wave-length section for the top quarter wave of the basic half wave antenna design. Its compact light economical and doesnt need any radial.

That includes the upper radiator lower radiator also the length of the cable that will be wound on the PVC pipe. David G6ENN enjoys cycling so decided to try push bike mobile with a Flower Pot Antenna. This one weighs 80 grams and is more compact.

The arrangement is shown in the sketch below. 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. The picture above is Davids Static mobile setup.

The video below shows the construction of a coaxial dipole for the aircraft band. Here is a link to his webpage with instructions for making several of his designs. Half Wave Flower Pot Antenna Vk2zoi - Sch40 pvc has a different velocity factor to grey upvc and as such my antenna needed some pruning.

The flower pot antenna IS a half wave dipole and is center fed just as the 12 wave dipole shown in the video. Flower Pot 2 metre aerial. David G6ENN has been busy building a 6m Half Wave Endfed.

It had been about 10 years since I used 2 metres actively. Six metre coax antenna The original flowerpot antenna weighed 255 grams. 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.

A few years ago a made one of VK2ZOIs dual band flowerpot antennas. 2m 144 MHz coaxial dipole or known elsewhere as a flower pot antenna. Heres a link if you want construction details of the two metre version.

Leave the dielectric insulator. 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. The 58λ radiator uses a 02λ shorted co-ax phasing stub to resonate the 58λ element.

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. G4NSJ - Flowerpot coaxial dipole antenna. RigExpert 600 MHz Antenna Analyser VSWR results.

9 turn choke on a 27 mm diameter form. Flower Pot RF Choke. Its a portable dual-band antenna working principally on 10 meters but also close to the 30 meter band.

Nomons Flower Pot Antenna Calculator - For example how the current flow to form a radiation. VSWR Plot 136 to 156 MHz. Ive found a.

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. John replied quickly with three detailed articles about his antenna and extracted a. I was surprised how well it worked and a few others tried it and found it worked very well.

Dual Band 2m 70cm Pvc Antenna Resource Detail The Dxzone Com - Film prezentujacy wykonanie anteny wg projektu vk2zoi. 6M10M Dual-Band Mobile Antenna Ideas. 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.

They are end fed coaxial dipoles with an interesting design to make them dual band and colinear for increased gain. Flower Pot Antenna. VSWR Plot 142 to 150 MHz.

Wawasan Tentang Elektronika Half-Wave Flower Pot Antenna The diagram below shows the basic arrangement of the 2m Half-Wave version of the antenna. Double 58 Flower Pot Antenna Extension of the Single 58 and uses a 58λ element for both the top and bottom radiators. 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.

Half Wave Flower Pot Antenna Vk2zoi - Ham radio antenna the flower pot antenna a stealth antenna. Inner conductor 455 mm and braid section 445 mm. Kenwood TH-D7AG Dual-Band DATA HT.

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. First results encouraging with David working through GB3UM and hearing the Beacon GB3BAA on 50016 MHZ.

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