j mount

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j mount

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Antennas : 2M
  • 146MHz 5/8 Ground Plane Antenna - 146MHz 5/8 ground plane tower mounted antenna. The antenna was largely based information and analysis provided by the RSGB's. VHF UHF Manual, fourth edition by G.R.Jessop, G6JP
    [ Hits: 3442 | Votes: 16 | Rating: 4.01 ]
  • 100 grams VHF yagi - A portable VHF home-made Yagi-Uda antenna, that is extremely easy to build and very cheap. Moreover this antenna, while dismounted is just 1 meter long, and the total weight is just 100 grams.
    [ Hits: 2517 | Votes: 9 | Rating: 6 ]
Antennas : 40M : 40 meter Delta Loop Antennas
  • 7 MHz Alumium Delta Loop - An inverted triangle Delta Loop Antenna for the 40 meter band made with aluminium pipes, each element is 14,2 meters including a home made aluminium mount.
    [ Hits: 1304 | Votes: 6 | Rating: 6.67 ]
Antennas : 6M
  • Six Meter Quad Turnstile Antenna - Simple 6 Metre DX Antenna based on an article by LB Cebick in QST May 2002 on a Quad Turnstile antenna. This antenna is basically two full wave loops mounted at right angles fed 90 degrees out of phase to produce an omni-directional horizontally polarized pattern
    [ Hits: 701 | Votes: 2 | Rating: 9.5 ]
Antennas : 80M
  • Frame Antenna for 80m - A frame antenna for the 80 meters band, built to be folded and to be easy to be mounted and dismounted. This antenna is suitable for indoor and QRP use, bandwidth is just 10kHz and should be observed a proper distance while transmitting due to high voltage.
    [ Hits: 726 | Votes: 5 | Rating: 8.8 ]
Antennas : Antenna Calculators
  • Center-Fed Wire Dipole Antenna Tuning Calculator - Ever need a way to estimate the amount of wire to add to or remove from a center-fed wire dipole antenna to achieve resonance at a desired frequency? This article help to determine correct wire lenght.
    [ Hits: 1005 | Votes: 7 | Rating: 2.86 ]
Antennas : Collinear
  • 7dB VHF Collinear Antenna - This project is about a cheap way of building a colinear antenna for VHF 145MHz, and having about 10dB more gain than that little 1/4-wave magmount
    [ Hits: 4739 | Votes: 15 | Rating: 6.41 ]
Antennas : Four Square
  • 80m 4 square antenna - A project for a ground mounted 4 square antenna by DM9EE
    [ Hits: 585 | Votes: 3 | Rating: 6.33 ]
Antennas : J-Pole Antennas : Masts and mounts
  • Homemade antenna mount - Homemade Jeep Tailgate Antenna Mount for use with a Swing Out Tire Carrier
    [ Hits: 949 | Votes: 0 | Rating: 0 ]
Antennas : Mobile Antennas : Quad
  • Swiss Quad Portabel, DH1PLY - A portable swiss quad antenna project made with components and parts that can be dismounted, in German
    [ Hits: 746 | Votes: 0 | Rating: 0 ]
Antennas : Theory
  • VHF/UHF Antenna mounting - Mounting antenna close each other. Distance calculations and tips on setting up antennas by KB9VBR
    [ Hits: 749 | Votes: 2 | Rating: 4 ]
Antennas : Vertical
  • The 10/15/20 Meter Trap Vertical Antenna - This antenna project came out very nice. It's a rugged homebrew multi-band trap vertical antenna that works the 10, 15, and 20 meter amateur radio bands. The antenna can be mounted on the ground or on a mast. Mounted on the ground the antenna has a low take off angle for working DX. If mounted on a mast the antenna will acheive both a low angle as well as another radiation lobe that has a much higher take off angle.
    [ Hits: 4152 | Votes: 14 | Rating: 6.08 ]
Antennas : WiFi
  • Linear Focus Parabolic Wifi Antenna - This antenna can be made in a couple of hours and involves a fair amount of measuring, cutting, bending, and bolting metal.
    [ Hits: 3443 | Votes: 5 | Rating: 4.4 ]
Manufacturers : Power Supply
  • SEC America, LLC - offers Rack Mountable DC Power Supplies, OEM Power Supplies, and Communication Series Desktop Power Supplies for a wide range of uses, including powering radio equipment.
    [ Hits: 322 | Votes: 0 | Rating: 0 ]
Operating Modes : QRP
  • IN3ECI - QRP Operations - Italian station operating mostly in QRP Mode, contain some interesting QRP projects for portable antennas and antenna mounts.
    [ Hits: 458 | Votes: 2 | Rating: 9 ]
Shopping and Services : Accessories
  • Gamber Johnson - Rugged docking stations and vehicle mounts
    [ Hits: 316 | Votes: 0 | Rating: 0 ]
Technical Reference : Antenna Rotator
  • Homemade Antenna Rotator Controller - The Antenna Rotator Controller is unique in that it senses, displays, and controls to the earth's true magnetic field. The compass sensor, mounted in a waterproof enclosure, is attached to the mast and sends its signal to a microcontroller
    [ Hits: 2621 | Votes: 3 | Rating: 6.33 ]
Technical Reference : Radio Direction Finding
  • 2M Programmable Fox-Or Transmitter - The 2 metre fox-or transmitter is a small low power transmitter which mounts in a small plasic pipe and runs off two AA batteries. The board measures just 12mm by 70mm.
    [ Hits: 1064 | Votes: 2 | Rating: 1 ]

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