Flower Pot Vhf
Why SWR significantly changes with adding 10-30 meters of coax in presence of RFI choke. 2m and 70cm FlowerPot Antenna.
Resultado De Imagem Para Antena Flower Pot
Version made for mounting on a telescopic pole.
Flower pot vhf. Begingroup The dual-band basic Flower Pot page. Would the 34 pvc pipe is as closed as we can come to in the USA is there any different in the dimensions the one I trying to build is. 1 1315 od 33401.
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. Live bait tank approx 10l and 80l esky. 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.
Neste vídeo eu ensinarei como montar uma antena FLOWER POT VASO DE FLORES Dual Band VHF e UHF de baixo custo e excelente desempenho. 25mm Conduit Minimum 1metre. VSWR plot at 145250 MHz top section 455 mm and the braid section is 445 mm.
The Double 58 is a natural extension of the Single 58 and uses a 58λ element for both the top and bottom radiators. The 58λ radiator uses a 02λ shorted co-ax phasing stub to resonate the 58λ element. Double 58 Flower Pot Antenna.
Nylon line 500mm Al-foil. 2m flower pot antenna center frequency 145250 MHz. The arrangement is shown in the sketch below.
New Blige and bait tank pumps. Half-Wave Flower Pot Antenna The diagram below shows the basic arrangement of the 2m Half-Wave version of the antenna. Modificações feitas por PU2PIS a partir do vídeo do Andrade Tutoriais.
Inner conductor 455 mm and braid section 445 mm. With the addition of some tinfoil and sticktape it can double as a 70cm colinear. The double 58 is a co-axially fed variation of the 1¼ wave vertical dipole shown in the adjacent diagram.
34 od 1050 2667mm. Bagi teman teman yg ingin lebih jelas silahkan masuk ke websi. Higher gain is achieved by adding an additional half wave element at the fundamental frequency 2m coupled by a half wave phasing line to drive both half-waves in phase.
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 flowerpot works well as a scanner antenna for VHF and UHF listening. This experimental version is an extension of the basic Half Wave Flower Pot Antenna.
Also new uniden vhf. That includes the upper radiator lower radiator also the length of the cable that will be wound on the PVC pipe. Experimental Dual Band High Gain Flower Pot Antenna.
In summer months the base can be used as a flower pot Makes an excellent conversation piece year round 100 recycled Hot water heater tanks Includes wood as shown Call Frank on today and be warm tonight under the stars. Welcome I have described on this website a number of VHFUHF antennae which have become known as the Flower Pot antennae. Berdasarkan permintaan penonton maka saya memberikan tutorial pembuatan Antenna Flower Pot lengkap dengan skema dari VK2ZOI.
This calculator is used to determine the length of each element of the flower pot antenna. What is the best type of feedline for a base UHF VHF ground plane antenna with a distance of around 50-75 feet of coax. This antenna should not be confused with an in-phase 58λ over 58λ collinear.
Half-Wave Flower Pot Antenna 2M or 2m70cm Dual Band Image 1 the Basic VHF 2M Design This is the basic 2m Half-Wave antenna using grey 25mm conduit to build a Dual Bander with 70cm capability - Continue the steps from Page 4. 12 inch which is 0840 or 21336mm both type pipe. 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.
The ZOI Flowerpot is an end-fed half wave antenna for 2m made from nothing more than RG58 coax and 25mm PVC pipe. My father Les G6SXB uses one when he goes caravaning so here it is the. Both sand and reef anchors.
John VK2ZOI dari Australia. This option is ideal for the backpack portable or an addition to the emergency 2m Go-box. Antena ini dibuat berdasarkan spesifikasi penciptanya yaitu Mr.
Like most antennas mount the flowerpot high and clear they work well. Semoga bermanfaat de YC2YIZ. 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 design is by John VK2ZOI who has excellent documentation and a step-by-step construction guide on his website here. 1 person likes this.
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