coax form

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coax form

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Antennas : 160M
  • G3YXM Small Loop - This simple antenna is capable of remarkable results on 160, 80 and 40 metres. Forming a triangle from around 50 feet of satellite TV coaxial cable, the top of the triangle can be as low as 15 feet, and the lower side just high enough to prevent a passer by hanging themselves
    [ Hits: 3759 | Votes: 2 | Rating: 9 ]
Antennas : Baluns
  • Transmitting Baluns - One of the most popular Ham-lore rumors is a balun's performance can be tested or evaluated by grabbing the coax and watching for an SWR change. This is probably one of the worse test-rumors circulating
    [ Hits: 3295 | Votes: 2 | Rating: 9.5 ]
  • QRP Magnetic longwire balun with VHF-splitter - This Magnetic Longwire Balun (MLB) makes it possible to efficiently use a coaxial lead-in cable with all forms of longwires, T-forms or other types of wire antennas, without the need for an antenna tuner.
    [ Hits: 3085 | Votes: 3 | Rating: 7 ]
  • Magnetic longwire baluns 1:9 - This Magnetic Longwire Balun (MLB) makes it possible to efficiently use a coaxial lead-in cable with all forms of longwires, T-forms or other types of wire antennas, without the need for an antenna tuner.
    [ Hits: 3584 | Votes: 4 | Rating: 6.75 ]
  • Magnetic Long Wire UnUn 9:1 - An impedance transformer (9:1) to feed a high impedance long wire (~450 ohm), down to a 50 ohm unbalanced coaxial input.
    [ Hits: 1929 | Votes: 4 | Rating: 7 ]
  • QRP Magnetic longwire balun with VHF-splitter - This Magnetic Longwire Balun (MLB) makes it possible to efficiently use a coaxial lead-in cable with all forms of longwires, T-forms or other types of wire antennas, without the need for an antenna tuner.
    [ Hits: 753 | Votes: 2 | Rating: 6 ]
Antennas : Baluns : 4 to 1 balun
  • The Guanella 1:4 balun - A cost effective current-mode 1:4 balun can be constructed from two lengths of coax, two ferrite rods, some electrical tape, cable ties, a length of PVC water-pipe and some connectors. This form of 1:4 current-mode balun is named after G. Guanella.
    [ Hits: 3636 | Votes: 1 | Rating: 10 ]
Antennas : Feed Lines
  • Line Loss Calculator - Types of coax-cable with rf attenuator calculator, line loss calculator form includes an antenna gain calculator. This coax loss calculator can help you on choosing the right cable for your antenna sysmte.
    [ Hits: 876 | Votes: 3 | Rating: 6.67 ]
Antennas : Feed Lines : Choke
  • Homebrew RF chocke - Magnetic Longwire Balun - RF Choke to prevent hf currents on the feedline. This Magnetic Longwire Balun (MLB) makes it possible to efficiently use a coaxial lead-in cable with all forms of longwires, T-forms or other types of wire antennas, without the need for an antenna tuner.
    [ Hits: 3410 | Votes: 3 | Rating: 10 ]
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 ]
Antennas : Quad
  • Assembly of the Lightningbolt Quad - One of the best antenna values on the market is the LightningBolt Quad. At about half the cost of a tri-band yagi, you get five band coverage with a single coax feedline and excellent performance from a light, low wind load antenna.
    [ Hits: 3748 | Votes: 10 | Rating: 6.8 ]
Antennas : Theory : Impedance matching
  • Matching with one-twelfth-wavelength feed line - Matching with a half wave or wuarter wave coaxial cable is pretty well known, but an existing 1961 system to do that with two one-twelfth-wavelength transmission lines.
    [ Hits: 540 | Votes: 1 | Rating: 10 ]
Antennas : Traps
  • CoaxTrap - This program let you design of antenna trap using length of coaxial line wound as solenoid on a coil former.
    [ Hits: 5521 | Votes: 10 | Rating: 3.7 ]
  • Bootstrap coax traps for antennas - Analysis of an antenna trap where a coil is formed of a length of coax cable, the outer conductor of one coax end is tied to the inner conductor of the other coax end, and the remaining connections form the terminals for the trap.
    [ Hits: 1356 | Votes: 2 | Rating: 9 ]
Antennas : Windom
  • The FD4 (FD3) Windom Antenna  pop - The 4-band Fritzel model FD4 is a special version of a Windom antenna. It is a half-wave long on the lowest frequency, and is fed from a coax cable through a transformer inserted in the wire at one-third from one end
    [ Hits: 53300 | Votes: 95 | Rating: 5.42 ]
Manufacturers : Antennas : Marine
  • Southwest Antennas - High-performance rugged antennas and RF accessories such as magnetic mounts, RF coaxial gooseneck adapters, LNAs, BDCs, for law enforcment, military, maritime and video markets.
    [ Hits: 243 | Votes: 0 | Rating: 0 ]
Radio Equipment : Contest Hardware
  • Top Ten Devices - Automatic band decoder, six way antenna relay, band reject coaxial stubs and more. Top Ten Devices is a two-man company formed in 1991 by N3RD and W2VJN.
    [ Hits: 1574 | Votes: 0 | Rating: 0 ]
Software : Antenna analysis
  • ERP Calculator Plus - ERP Calculator is an Amateur Radio software utility designed to perform a side-by-side comparison of two Ham Radio antenna systems. ERP Calculator comes pre-programmed with data files including published data for several popular brands and types of coax cable as well as several popular antenna system brands and models. ERP Calculator displays values of ERP, Antenna Power Gain, Antenna Feed point Power, Antenna System Gain in dB, Antenna Gain in dBd, SWR Attenuation in dB, SWR Power Attenuation, Coax Loss in dB, and Coax Power Loss
    [ Hits: 3001 | Votes: 9 | Rating: 5.11 ]
Technical Reference : Coax Cables and Connectors
  • Coaxial Cable & Power Handling - This calculator can be used to estimate the attenuation (dB loss), power handling capability, and transmission efficiency for some of the more popular Wireless Communications and MIL Spec cables at the frequency of interest
    [ Hits: 1181 | Votes: 8 | Rating: 8.17 ]
  • Coax Cable impedance - How to calculate impedance of unknown coaxial cable with a simple formula.
    [ Hits: 247 | Votes: 1 | Rating: 8 ]

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