Shunt feed tower 160 meters

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August undefined, 2024

WebDec 13, 2024 · 160 Meter Shunt Fed Tower System - Vertical Antenna. I wanted to use my tower as a vertical on 160 meters. The tower is an LM-470D motorized 70 foot crank-up … WebNov 15, 2024 · A shunt fed tower is pretty simple: run a wire parallel to the tower, attach it to the tower where the resistance part of the impedance is 50 Ω and use one (gamma …

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WebFeb 21, 2024 · Very nice. I just use the MFJ anylazer and tune for 50 ohm J+0 reactance ,or close as I can get. I like to keep the VSWR under 1.7:1 at the dip. Or return loss under 18. You will need a shunt coil at the feed for the lower frequencies. That antenna will be 12 ohms on 75 meters or something very low. Here is my experimental 160 meter loading coil. Web160 meters is +12 VDC, 80, 60, 30 meters is 0 VDC and 40 meters is -12 VDC. Base Loading Philosophy Since the series combination of the 160 meter loading coil and 160 meter shunt coil has a very high impedance at 60 meters and higher, it was simpler to just leave them in the circuit for all other bands. Drawings robins and day canterbury

How to shunt feed your tower - Simple Ham Radio Antennas

WebThe tower or mast should be 40 feet to 65 feet, and the more beams and stuff on the top, the more top loading it will have to help it work on 160 and 80 meters. The tower used for shunt feeding must be electrically conductive from top to bottom. http://wa0mhj.com/station.html WebSep 1, 2024 · The shunt is used to measure the current to the load. Power is the product of the voltage applied to a load and the current consumed by it. The shunt is low value resistor that may only be a small fraction of an ohm (depending upon the load current). This example is designed for currents up to 100A and so the value of the shunt may be just 500 ... robins and day chislehurst service

Base vs center loading a vertical antenna

Low-band verticals and how to feed them

WebFeb 23, 2024 · Since my antenna tower is grounded I searched for a way to shunt feed with a autotuner like a gammamatch. ... The shunt fed tower should work fine from 160m-40m. ... With a very similar configuration he … WebIn accordance with the present invention, a single shunt feed mechanism, including a single gamma section and a single impedance matching circuit, is employed to enable an antenna tower as an effective radiator in plural wave length bands without having to alter the upper tie point of the gamma section to the antenna tower. In one embodiment, the shunt feed … robins and day birmingham peugeotWebA second shunt, loads the system on 80m using a 25' top hat wire. The two hat wires are switched with a vacuum relay at the thrust bearing of the tower. I tuned the 160m with the … robins and day chelmsford service

"Web80/160m. Shunt Feed Tower. In the past Years i did many experimental Antennas dipoles, verticals, loops, one of that was a 160/80m. Shunt Feed Tower 85 feet high plus 7 bands … " - Shunt feed tower 160 meters

Shunt feed tower 160 meters

The G4AXP / VK6MC 160 meter Vertical Antenna - vk6.org

WebSince the beginning I decided to use it as a 160 m. ... So the equivalent cylindrical diameters of the four sections of my tower are the following: 1° : 6 meters from 130 cm to 110 cm. on side - 110 mm tubes : equivalent ... the most authoritative person on shunt feeding towers, said that the equivalent cylindrical method was not working ... WebFeb 17, 2005 · element to the boom when you shunt feed the tower on 160 meters. Certain types of baluns used on Yagis can be destroyed by shunt feeding the tower. If you use a balun using ferrite material (eg, W2DU, Hy-Gain, or Force-12) you may have to decouple 160-meter RF from reaching the balun, which is not easily done

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Web160 Meter Shunt vertical feed and tuner box on West tower. One of the capacitors is driven by a small 12 volt motor for QSYing. The 160M shunt vertical control box is the little box … WebMay 3, 2024 · Many radio amateurs shunt feed their towers as vertical antennas for the lower HF bands (160m-40m). Although the procedure appears clear-cut, there are several …

WebAny 160 meter mobile antenna will have very poor efficiency, perhaps as low as .3%. ... that antennas don't achieve gain in the usual sense. If you feed an antenna with 50 watts, ... (ground loss, shunt capacitance, etc.). The reason most antenna manufactures don't publish their Q ratings is simply because they're really low—in the 50 to 60 ... WebSep 21, 2024 · $\begingroup$ Top loading may be the cheapest way to get more current flowing over the entirety of the vertical radiator, with the added benefit of reducing the capacitive reactance you have to match. Think of the combination as simply bending a longer radiator. This can be as simple as a wire from the top of the "radiator" to a nearby …

WebMater'a'fact...that's my other option. The problem with shunt feeding the tower is all the wire antennas hanging from it. Two half wave, center fed 75 meter slopers and one half wave center fed sloper for 40. That and the tower is only 10 feet from the corner of the attached garage. I have some concerns about a 160 vertical and all that house ... http://www.redwaveradio.com/9_497d8ed56c249568_1.htm

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Webtower with 64 radials tuned with a shunt feed system. Lately, I have struggled to break a pileup or work a station when con-ditions were good. This should not happen. In the summer of 2024, I began re-searching a 5 element parasitic switchable vertical array for 160 meters. This paper outlines my basis for choosing this system robins and day chingford peugeotWebThe 160 meter success with a tower only 70 feet tall could easily be applied to a shorter tower for 80 meters. ... A shunt coil of about 100 microHenries at the feedpoint (67 turns … robins and day chislehurst citroenWebThe coil is 20 turns, #12 solid, 1 & 1/4 inch I.D. ( closet hanger dowel works great ) spread to 5" long, ( thats 4 turns per inch ). One end to feed point, other to ground. Clip lead from ground taps up the coil to adjust the inductance used. Eight turns works perfect for 40m, and 4 turns for 20m. Mind you, this is on a wagon - results will ... robins and day chiswick citroenhttp://www.iv3prk.it/user/image/..-txant.prk.pdf robins and day citroenWebK2YWE's Small Space 160m Antenna - KC2TX 160-80m. Coaxial Receiving Loop - KE4UYP's Top feed linear loaded 80m. 160m. - KQ6XA's Low Bands Antennas Project - Low Bands Antennas for 160/80 m. - NS8O's 160m. L antenna - PI4CC Battle Creek Special-OK1RR's Battle Creek Special - VE2DPE's 160m. Inv. Vee - W1QC's 160m. Shunt Feed Tower - … robins and day chiswick used carsWebApr 25, 2024 · This shows the method for shunt feeding a tower. Using two different analyzers I show how to find the 50 Ohm point on the tower to achieve a 1:1 SWR match. ... robins and day chiswick peugeotWebThe tower or mast should be 40 feet to 65 feet, and the more beams and stuff on the top, the more top loading it will have to help it work on 160 and 80 meters. The tower used for … robins and day chiswick reviews