j type

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j type

46 links

Antennas : 2M
  • J-Pole Antennas for 2 Meters  pop - This paper describes two types of 2 meter J-Pole antennas, one made of copper pipe and a roll-up J-pole made of TV twin lead. The figures give the details of the dimensions, components and construction.
    [ Hits: 29267 | Votes: 8 | Rating: 7.37 ]
Antennas : 40M
  • JA7KPI Windom antenna for 40-80 - The total length of this antenna is 41m, height is about 11m, and diameter of element is 2mm. JA7KPI modified this antenna originally used as Inverted-V type of 80m band Dipole. Works on 40 - 80 meters band with acceptable swr.
    [ Hits: 7709 | Votes: 8 | Rating: 6.25 ]
Antennas : Baluns
  • Les baluns - About different baluns types. Samples and schematics for several ratios baluns in french
    [ Hits: 1666 | Votes: 0 | Rating: 0 ]
Antennas : Beverage
  • Beverage Antenna Construction - Types of beverage wires, choose best supports and insulators, multiple antennas at one feedpoint, all well documented with photos and exaustive explanation.
    [ Hits: 15515 | Votes: 9 | Rating: 8.45 ]
Antennas : Homebrewing Techniques
  • Antenna Design Lab by N4UJW - Design and build your own Hf thru Vhf antennas.Contains pictures, plans, parts list of very popular ham antennas along with experimental types.
    [ Hits: 6573 | Votes: 11 | Rating: 7.09 ]
Antennas : Loop
  • N6RK Loop Antennas - An improved feed network for loop-type receiving antennas article published in NCJ October 2009 issue
    [ Hits: 943 | Votes: 0 | Rating: 0 ]
Antennas : Portable
  • Portable HF Antenna for the field day - This article describes a project of asymmetrical hatted vertical dipole, a portable antenna that can be used for field day operations, sota, campings or even for fixed installations. This is a freestanding 20-10m antenna that is really easy to build, easy to tune and relatively easy to carry.
    [ Hits: 1642 | Votes: 2 | Rating: 7.5 ]
Antennas : Rhombic
  • Rhombic Antennas - Description and simulation of two types of rhombic antennas, using the software 4Nec2: the simple bi-directional and the terminated directional rhombic antenna
    [ Hits: 839 | Votes: 1 | Rating: 10 ]
Antique Radios : Repair and Restoration
  • BoatAnchor Manual Archive - BAMA - The manuals in this archive are available to all who enjoy working on and restoring old tube type amateur radio equipment and short wave receivers. Hundreds of boatanchor manuals
    [ Hits: 21505 | Votes: 90 | Rating: 7.8 ]
Manufacturers : Antennas : HF : Small & Stealth Antennas
  • EH Antenna Systems - Provide information relative to a new antenna concept. AM Broadcast antennas and amateur radio prototypes
    [ Hits: 12903 | Votes: 86 | Rating: 5.45 ]
Radio Equipment : HF Transceivers : Yaesu FT-857
  • Yaesu FT-857 Jumpers - Schematic of Yaesu FT-857 main board original jumpers based on different radio type
    [ Hits: 1287 | Votes: 1 | Rating: 1 ]
Shopping and Services : Antennas
  • Radio Oasis - Ham radio shop in South Salem, NY, dealer for Alinco, LDG, Cable X-perts, Jetstream and several antenna types and makers
    [ Hits: 661 | Votes: 0 | Rating: 0 ]
Shopping and Services : Electronic Components
  • ASAP Semiconductor - Electronic Component Distributor - ASAP Semiconductor is wholesale electronic component distributor in USA. We supply all types of electronic components like semiconductors, capacitors, resistors, diodes and many more
    [ Hits: 343 | Votes: 1 | Rating: 10 ]
Software : Macintosh
  • Beam Aim - Draws a world map centered on your QTH. Type in a DX station's call sign to get the beam aim azimuth and distance to the station.
    [ Hits: 1955 | Votes: 8 | Rating: 3 ]
Software : Propagation
  • GeoAlert-Extreme Wizard - GeoAlert-Extreme Wizard maintains updated geophysical indices and displays the information in a friendly - at a glance - manner. GeoAlert-Extreme Wizard features a Global Maximum Usable Frequency, MUF, map that creates and manages predictions from the VOACAP engine. Displayed geophysical indices include: solar wind Bz component, speed and pressure, current WWV type indices and predicted solar flux, planetary A-Index and probability of major storms at middle latitudes for the next day.
    [ Hits: 1723 | Votes: 3 | Rating: 7.67 ]
Technical Reference : Filters
  • Mode J Desense Filter - This type of filter can be used in a Mode J satellite station (uplink on 2m, downlink on 70cm) to reduce the problem of the uplink signal desensing the receiver
    [ Hits: 1156 | Votes: 2 | Rating: 5 ]
Technical Reference : Homebrew
  • QRP AM(cw) Transmitter for 10 meters - In this project, you will make a simple low-power broadcast-type circuit, using a crystal oscillator integrated circuit and an a collector modulated AM oscillator.
    [ Hits: 1239 | Votes: 2 | Rating: 10 ]
Technical Reference : Morse Keys
  • Adjusting Morse Keys and Paddles - These instructions use simple, generally familiar examples of equipment types and are designed to help you find the adjustment that suits you best. If you are looking on how to adjust a morse key, bencher key, paddle or straight morse key, here you will find all instructions.
    [ Hits: 1677 | Votes: 0 | Rating: 0 ]
Technical Reference : Power Meter
  • KD1JV Digital SWR / Power Meter - This small, light weight digital SWR and power meter uses an Atmel AVR Butterfly demo board and a Stockton type directional coupler.
    [ Hits: 1404 | Votes: 3 | Rating: 4 ]
Technical Reference : Radio Frequency Interference
  • Intermodulation - Intermodulation distortion, commonly known as Intermods, is a type of interference that can occur in any non-linear junction.
    [ Hits: 541 | Votes: 1 | Rating: 10 ]

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