rf toroid

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rf toroid

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Antennas : Baluns

  • DIY isolation transformers - Article about isolation transformer construction to perform optimal impedance matching. Winding the FCP isolation transformer, includes interesting table for Winding Turns and Lengths and Core Configurations for T300 T200 T400 toroids
    [ Hits: 316 | Votes: 0 | Rating: 0 ]
  • Choking balun for 160-30 meter band - Choking balun for lower HF and MF bands. (1.8MHz - 10MHz). Requiring a choking balun to isolate the potential RF pick up on the coax cable as it runs past equipment such as computer within the radio room at lower HF and MF frequencies a simple method of winding RG58 coax onto a Powdered Iron Toroid Core was constructed.
    [ Hits: 196 | Votes: 3 | Rating: 6 ]
Antennas : Feed Lines : Choke
  • How to evaluate Choke performance - If you want to build your own common mode choke, this article explains how to measure the efficiecy of your choke before using it. In the examples has been used Amidon FT240-31 toroids.
    [ Hits: 209 | Votes: 1 | Rating: 8 ]
  • RF Choke with Bifilar Windings - This article presents an RF Choke featuring an 11-bifilar turn winding of #14 house wire on a Fair-rite FT240-31 toroid. The choke is enclosed in a 3D-printed case from Thingiverse, though this may pose thermal concerns at higher power levels. With SWR concerns up to 30MHz, the author plans to employ two series chokes at the rig input for improved performance. This choke offers versatility for portable use, with potential mismatch resolution using an antenna tuner. Further testing is anticipated upon the arrival of new cables.
    [ Hits: 85 | Votes: 0 | Rating: 0 ]
Manufacturers : Baluns
  • Amidon Inc. - Ferrite Toroids. Iron Powder Toroids. Ferrite Beads. Split Cores. Cable clamp-ons. Balun Cores. W2FMI Baluns and Ununs. Inductive components for EMI Suppression and RFI Suppresion, power supplies, HAM radio.
    [ Hits: 2081 | Votes: 4 | Rating: 5.75 ]
Manufacturers : Electronic Components
  • Communication Coil - Communication Coil, Inc. designs and produces custom, high reliability Filter Networks, RF Coils, Chokes, Inductors, Baluns, Toroids and Power Magnetics for communications
    [ Hits: 806 | Votes: 0 | Rating: 0 ]
Shopping and Services : Accessories
  • DX-Wire - German internet shop for difficult-to-find components, which are used by radio amateurs. Antenna parts, masts and mounts, cables connectors, wires, rf-chockes, toroids cores, twin-lead, teflon -strand, insultators
    [ Hits: 4201 | Votes: 6 | Rating: 6.67 ]
  • Ham Goodies - Amateur Radio goodies for not only the Shack, but also a range of outdoor/portable kit. Ferrite toroids, RTL SDR, Un-uns and Baluns for antennas and RF Filters. Based in the UK.
    [ Hits: 144 | Votes: 0 | Rating: 0 ]
Technical Reference : Amplifiers
  • HL1INF RF Amplifiers - Circuits, pictures and data about toroids, tubes and home made power amplifiers
    [ Hits: 2430 | Votes: 1 | Rating: 10 ]
Technical Reference : Components : Toroids
  • Ferrite information - Ferrite Toroidal Cores, Magnetic Properties of Ferrite Materials, EMI - RFI Suppression Design Considerations, Ferrite Beads, Ferrites for RFI Ferrite Cores for RFI Suppression by CWS ByteMark
    [ Hits: 13699 | Votes: 4 | Rating: 5 ]
  • RF Toroid Calculator - This RF Toroid Calculator provides graphical calculator used to determine the inductance and other parameters of ferrite and powdered-iron toroids. It simplifies the process of selecting the appropriate toroid for use in radio frequency (RF) circuits
    [ Hits: 102 | Votes: 2 | Rating: 10 ]
Technical Reference : HF Radios
  • BITX QRP RTX - An easy to build 6 watts SSB transceiver for 14MHz. BITX is an easily assembled transceiver for the beginner with very clean performance. Using ordinary electronic components and improvising where specific components like toroids are not available, It has a minimum number of coils to be wound.
    [ Hits: 101 | Votes: 0 | Rating: 0 ]
Technical Reference : Radio Frequency Interference : Noise Reduction
  • Common-mode chokes Measurements - Common-mode chokes are useful solutions for RFI reduction. Winding a few turns of coaxial cable on the FT 240-31 toroid can reduced the noise below the received noise floor. In this article author measure different chokes
    [ Hits: 155 | Votes: 1 | Rating: 8 ]

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