wire length

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wire length

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Antennas : 160M
  • 22 Antennas for the 160 Meter Band - 22 Different Wire Antennas for the 160 Meter Band, Random Length Radiator Wire, delta loop, loop antennas, off-centered antennas, sloper, dipoles, Z antenna, Zepp and Clothesline Antennas
    [ Hits: 764 | Votes: 1 | Rating: 1 ]
  • The 160M No Excuses Homebrew Vertical - This antenna is designed for stations having a difficult time putting a decent signal on 160M from small or CC&R d lots. It is a 24.5 ft. vertical antenna, made from three 10 ft. PVC sections bolted together, and half wavelength of antenna wire helically wound around the PVC sections.
    [ Hits: 402 | Votes: 0 | Rating: 0 ]
Antennas : 20M : 20 meter Dipole Antennas
  • Vertical Dipole Antenna for 14 MHz by G3PND - An home made vertical dipole antenna made with simple material. The antenna has a total length of aproximately 16 feet. In this article appeared on June QST 2019, the author explain how he reached the optimal confirugation changing and adjusting the lower part of the antenna, trimming and spacing correctly the copper wire. PDF File to downloas
    [ Hits: 1216 | Votes: 3 | Rating: 4 ]
Antennas : 6M : 6 meter J-Pole Antenna
  • J-Pole Antenna for 50 MHz - This J-Pole is mounted on a fishing rod. The radiator L1 is an isolated copper-wire with a length of 281,5 cm while the quarter-wave matching sector L2 is made with 450-Ohm-Wireman-cable
    [ Hits: 220 | Votes: 0 | Rating: 0 ]
Antennas : 80M
  • 80M Grounded Half Loop - The grounded half loop describe in this article is basically a half wave length wire on 80 Meters
    [ Hits: 1115 | Votes: 1 | Rating: 1 ]
Antennas : Antenna Calculators
  • Helical Antenna Design Calculator - Helical antennas invented by John Kraus give a circular polarized wave. They are one of the easiest to design. Find a tube with a circumference equal to one wavelength, and wrap wire in a helix spaced a quarter wavelengt
    [ Hits: 2155 | Votes: 15 | Rating: 6.41 ]
Antennas : Baluns
  • 1:49 Transformer - This 1:49 transformer is used with wires any multiple of 1/2 wavelength. This is not a matching network, it's a wideband transformer and it has some advantages compared to LC matching
    [ Hits: 2468 | Votes: 25 | Rating: 5.84 ]
Antennas : Delta loop
  • Delta Loop for HF - Planning and modelling Delta Loop antennas for all the ham radio HF bands include calculated wire lengths at each mid-band
    [ Hits: 2046 | Votes: 5 | Rating: 5.8 ]
Antennas : Four Square
  • TX Four Square Antenna - A 220-ft tower that has five catenary lines, each about 500 feet long. Four of these lines, running NE, SE, SW, and NW support four 1/4-wavelength wire verticals used in a 160-meter four-square antenna.
    [ Hits: 787 | Votes: 0 | Rating: 0 ]
Antennas : Homebrewing Techniques
  • Wire Antenna Design Lengths - The Classic Numbers for All Types of Wire Antennas at HF. Wire antennas need to be made a bit long and cut to resonance. They are affected by height above the ground and surrounding objects. In order to get an idea of the right place to start, certain formulas are generally accepted.
    [ Hits: 325 | Votes: 1 | Rating: 7 ]
Antennas : Loop
  • Full Wave Loop Dimensions - This article contains the measurements for building a full wave loop using wire and length of 1/4 Wave Coax Matching Transformer
    [ Hits: 1088 | Votes: 3 | Rating: 7 ]
  • Vertical Full Wavelength Loop - Consider installing a stealth vertical loop antenna if you live in a place with no antenna restrictions. Full wave loop wire antennas allow you to be on the air without installing evidente external aerials.
    [ Hits: 456 | Votes: 1 | Rating: 8 ]
  • 40m Loop Antenna - This project is a full wavelength, horizontal, loop antenna for the 40 metre Amateur Radio band, built using insulated copper wire in a diamond shape, supported by egg insulators, tethered to 4 masts, each 6.5m high
    [ Hits: 192 | Votes: 0 | Rating: 0 ]
Antennas : Stealth
  • Balcony Vertical HF Antenna - The simple balcony vertical HF antenna made with plastic fishing pole. Just along the pole I install copper wire in 7 meter length. Then was installed ATU. It was used home brew tuner. For each band was used one counterpoise in length 0.8 x lambda/4
    [ Hits: 236 | Votes: 0 | Rating: 0 ]
Antennas : Towers
  • Antenna Mast Guying for Amateur Radio Antennas - Article based on ROHN engineering specification that will guide on proper guying heights and guy lengths when guying ham radio antenna masts. It will help you determine ahead of time the proper length of guy wires and the distance from the base of the mast to the anchor points
    [ Hits: 311 | Votes: 3 | Rating: 7.67 ]
Antennas : Tuners
  • F5RDS remote antenna tuner - An home made remote antenna tuner project that with a 6 meter random wire and two radials of about the same length, can tune from 40 to 10 meters without any issue.
    [ Hits: 346 | Votes: 2 | Rating: 2 ]
Antennas : Wire
  • Long wire antenna random wire - About longwire antennas, technically to be a true longwire an antenna needs to be at least one wavelength long, but common use of the term by Hams is for any random wire length that is end fed.
    [ Hits: 1316 | Votes: 2 | Rating: 4 ]
  • Random Wire Antenna Lengths - An interesting article on random wire antennas, and how to choose the optimal lenghts for multiband operations.
    [ Hits: 1206 | Votes: 5 | Rating: 8.2 ]
  • Long Wire Antenna for portable operations - With the view to establish a quick and easy multi-band antenna deployment for portable and camping operations a simple long wire antenna with an earth or earth plus counterpoise arrangement with a 9:1 voltage unun including a tuner or simply with a tuner is one possible solution. With the 9:1 voltage unun and wire lengths suggested in the below tables the antenna should present non extreme impedances for all HF amateur band frequencies. This page is far from complete and represents the ongoing investigation into this type of antenna. Experiments to date seem to have raised more questions than obvious answers.
    [ Hits: 789 | Votes: 13 | Rating: 8.69 ]
Technical Reference : Vector Network Analyzer
  • miniVNA PRO Modifications - The mini Radio Solutions miniVNA PRO is the only affordable vector network analyser (VNA) I know of that offers remote wireless operation. This is very interesting because it allows to measure the input impedance of HF antennas installed at height without having to deal with coax cable lengths, baluns nor common mode suppression chokes. However, to render the miniVNA PRO truly field proof, it requires a number of significant modifications.
    [ Hits: 135 | Votes: 5 | Rating: 7.8 ]

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