coil of

The DXZone.com

coil of

67 links

Antennas : 40M : 40 meter Dipole Antennas
  • 40m Linear-Loaded Dipole - A short dipole wire antenna for 40 meters band. It is a folded dipole that do not make use of coils and can be used either in horizontal or inverted V configuration
    [ Hits: 1502 | Votes: 3 | Rating: 8.67 ]
  • 40m loaded dipole - This is an short dipole for 7 MHz. Total length of this dipole is just 10 meters, 33 feet. Missing lenght is balanced by a coil made of 49 turns of a 40mm diameter pvc pipe. The use of a choke balun is recommended, as always, to adapt the unbalanced coax cable to the balanced antenna, and to prevent RF feed back along the coax shield.
    [ Hits: 192 | Votes: 4 | Rating: 8.75 ]
  • Make a Compatct Dipole for 7 MHz - This article demonstrate how to build and mount a 40 meter loaded dipole using basic materials. This antenna reduce the overall length of an HF dipole through the use of loading coils.
    [ Hits: 215 | Votes: 0 | Rating: 0 ]
Antennas : 40M : 40 meter Vertical Antennas
  • A very efficient half size 40 meter Vertical Antenna - A vertical antenna project for the 7MHz made with some spare parts. Based on a broken 20 foot fishing pole, it is based on a good ground system made with radials and a capacitive hat done to increase the global radiation resistance of the antenna. A custom loading coil is also included in this project to perfectly tune the antenna to the CW portion of the 40 meters band.
    [ Hits: 735 | Votes: 4 | Rating: 8.5 ]
Antennas : 80M
  • 80m Shortened Dipole Antenna - This antenna just requires about 24m of free space instead of 41m that a normal half wave 80m antenna needs to hang up. The so called loaded dipole uses a coil in every dipole arm to electrically lengthen the mechanical too short dipole arms. Every coil has an inductivity of 120 microHenry.
    [ Hits: 152 | Votes: 0 | Rating: 0 ]
Antennas : Antenna Calculators
  • Coil-Shortened Vertical Antenna Calculator - You can shorten a vertical antenna by using a loading coil. This online calculator tells you how the amout of inductance your loading coil will need to have.
    [ Hits: 309 | Votes: 2 | Rating: 5.5 ]
Antennas : Dipole
  • 80m-40m Loaded Dipole - A dual band dipole antenna for 40 and 80 meters band. Total lenght of 26 meters, foreseen two coils at aprox 11 meters distance from center feed.
    [ Hits: 244 | Votes: 4 | Rating: 5 ]
Antennas : End-Fed
  • Multi-band End-Fed Antenna - An excellent guide to homebrewing multi band end-fed antennas. The article, embed several drawings including diagrams and detailed pictures, illustrating the basic funcionality of end-fed antennas. The author gives some basic hints on how to build a half size antenna for 80 40 to 10 meters and a 6 meter to 40 meter configuration. It is also well described how to build the impedance transformer and the loading coils for lower bands.
    [ Hits: 1100 | Votes: 6 | Rating: 4.5 ]
Antennas : End-Fed : End Fed Half Wave Antenna
  • End Fed Half-Wave Antennas - An interesting article on end fed half-wave wire antennas with a couple of original experiments. Author illustrate the role of the QRP matchbox, and a 40/20 meter antenna with a center stub making it a large bandwidth antenna for 40 and 20. Includes also an 80/40 end fed with the typical coil to make it available on 80 merts band.
    [ Hits: 287 | Votes: 2 | Rating: 10 ]
Antennas : J-Pole
  • Improving Gain of the Super J-Pole Antenna - The collinear J-Pole, often known as the Super-J, does improve the behavior over a regular J-Pole. there is an advantage when vertically combining 1/2 radiating sections to have a bit of separation between the half-wave end points. Get 0.8 dB more gain out of the trusty Super-J by replacing the traditional phasing stub with a long coil.
    [ Hits: 189 | Votes: 0 | Rating: 0 ]
Antennas : Multiband
  • Short Multiband Dipole Array - A multiband shortened fan dipole. This page offers and online calculator that can be really useful if you plan to homebrew a multiband dipole for low HF bands and you don't have all needed space for the full lenght. It combines multiband dipole with loading coild for selected bands.
    [ Hits: 229 | Votes: 0 | Rating: 0 ]
Antennas : Portable
  • Balcony Mounted Buddistick Antenna by KP4MD - The antenna handles 250 watts and covers 40 through 10 meters, with an optional add on coil for 80 and 60 meters. The author in this pages includes an interesting video in which describes the antenna setup, and the importance of the shunting coil on lower bands like 40 and 80 meters. SWR curves diagrams are also included and demonstrate the influence on resonating frequency of the shunting coil.
    [ Hits: 279 | Votes: 3 | Rating: 10 ]
Antennas : Repair and Maintenance
  • Cushcraft R7000 Prob/Repair - Repairing a Cushcraft R7000 antenna featuring several problems, mostly concerning coils and the insulating parts of the antenna.
    [ Hits: 209 | Votes: 1 | Rating: 10 ]
Radio Equipment : HF Transceivers : Yaesu FT-817
  • The FT-817 Calibration Menu - One of the interesting features of the FT-817 is that many of the conventional calibration settings that would have, in the past, been done using manual adjustments of coils, capacitors, and potentiometers, are done via software.
    [ Hits: 128 | Votes: 0 | Rating: 0 ]
Software : Circuit Design
  • Coil Inductance and Q Calculator - Calculates inductance and Q for single-layer coils made of solid or Litz wire. Uses U.S. or metric dimensions. Can automatically maximize Q. Includes accuracy data. Runs in Windows.
    [ Hits: 255 | Votes: 0 | Rating: 0 ]
  • mini Ring-Core-Calculator - Calculate windings on ferrite cores - The program can be used to calculate inductors (coils) and their number of turns on ferrite cores, ferrite shells and air coils. These can be used for baluns, Ununs, bandpass filters, low pass filters, resonant circuits, and more. The technical specifications of the cores are already integrated in the program. Application is free and runs on Windows 32 bit versions only. To make it run on Windows 10 64 bit need to be unzipped in a single folder.
    [ Hits: 390 | Votes: 1 | Rating: 1 ]
  • Online Helical Coil Calculator - This online calculator will give as output the Inductance L of a coil, including the total lenght of the wire needed to wound the coil. As input, requires the Diameter, number of turns, wire diameter and turn spacing
    [ Hits: 341 | Votes: 7 | Rating: 5.71 ]
  • Online Coil Inductance Calculator - This online calculator will return the inductance of a coil. It will ask you the total number of turns, the total diameter of the coil and its lenght, from the first winding to the last. Obtaining the correct inductance in winding a coil can be easy if you already know how many turns are needed. Available in inched and centimeters,
    [ Hits: 104 | Votes: 0 | Rating: 0 ]
  • Amidon ferrite toroids calculator - Select the toroid by material type and dimension of the toroid, the desired inductance and you will get the numbers of turns
    [ Hits: 391 | Votes: 3 | Rating: 6 ]
Technical Reference : Coax Cables and Connectors
  • Ecoflex-15 Degradation - This article describes the problem detection on power loss events experienced during repeated usage of the Ecoflex-15 coax cable by members of the G3PYE contest minions and addressed to repeated coiling and uncoiling which has fractured the foil braid in numerous places.
    [ Hits: 175 | Votes: 0 | Rating: 0 ]

Not satisfied ? Lookup Google Custom Search Engine for coil of


Search coil of with: Yahoo!, DuckDuckGo , Bing

Search

Related Searches

Get our links, Everywhere!

Follow us on Social Networks
RSS Feeds The DXZone.com RSS feed

Sign up for daily Newsletter

Service provided by Google FeedBurner

Free for your Site

Add our gadgets to your site
Daily Top 10 links

Google Custom Search