Flower Pot Vhf
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. 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.
Dual Band Half Wave Flower Pot Antenna Ham Radio Antenna Ham Radio Antenna
Welcome I have described on this website a number of VHFUHF antennae which have become known as the Flower Pot antennae.
Flower pot vhf. 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. Neste vídeo eu ensinarei como montar uma antena FLOWER POT VASO DE FLORES Dual Band VHF e UHF de baixo custo e excelente desempenho.
The 58λ radiator uses a 02λ shorted co-ax phasing stub to resonate the 58λ element. Also new uniden vhf. This calculator is used to determine the length of each element of the flower pot antenna.
VSWR plot at 145250 MHz top section 455 mm and the braid section is 445 mm. This antenna should not be confused with an in-phase 58λ over 58λ collinear. This experimental version is an extension of the basic Half Wave Flower Pot Antenna.
The arrangement is shown in the sketch below. Version made for mounting on a telescopic pole. Bagi teman teman yg ingin lebih jelas silahkan masuk ke websi.
25mm Conduit Minimum 1metre. Nylon line 500mm Al-foil. Why SWR significantly changes with adding 10-30 meters of coax in presence of RFI choke.
Inner conductor 455 mm and braid section 445 mm. 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. Live bait tank approx 10l and 80l esky.
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. 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. 2m and 70cm FlowerPot Antenna.
1 person likes this. My father Les G6SXB uses one when he goes caravaning so here it is the. The Double 58 is a natural extension of the Single 58 and uses a 58λ element for both the top and bottom radiators.
Like most antennas mount the flowerpot high and clear they work well. Antena ini dibuat berdasarkan spesifikasi penciptanya yaitu Mr. Experimental Dual Band High Gain Flower Pot Antenna.
The flowerpot works well as a scanner antenna for VHF and UHF listening. 1 1315 od 33401. New Blige and bait tank pumps.
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. That includes the upper radiator lower radiator also the length of the cable that will be wound on the PVC pipe. John VK2ZOI dari Australia.
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. Double 58 Flower Pot Antenna. Half-Wave Flower Pot Antenna The diagram below shows the basic arrangement of the 2m Half-Wave version of the antenna.
12 inch which is 0840 or 21336mm both type pipe. 34 od 1050 2667mm. Both sand and reef anchors.
Berdasarkan permintaan penonton maka saya memberikan tutorial pembuatan Antenna Flower Pot lengkap dengan skema dari VK2ZOI. 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 double 58 is a co-axially fed variation of the 1¼ wave vertical dipole shown in the adjacent diagram.
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. 2m flower pot antenna center frequency 145250 MHz. Modificações feitas por PU2PIS a partir do vídeo do Andrade Tutoriais.
The design is by John VK2ZOI who has excellent documentation and a step-by-step construction guide on his website here. This option is ideal for the backpack portable or an addition to the emergency 2m Go-box. With the addition of some tinfoil and sticktape it can double as a 70cm colinear.
Semoga bermanfaat de YC2YIZ. Begingroup The dual-band basic Flower Pot page.
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