no crystal

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no crystal

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Antennas : Theory

  • Speedometers SWR Meters and Smith Charts - Have wondered why a Smith chart has such strange grid lines. Believe it or not, there is a logical progression from Speedometers to Smith charts that will make the Smith grid crystal clear.
    [ Hits: 479 | Votes: 1 | Rating: 5 ]
Manufacturers : Parts and Surplus Radio Equipment : HF Transceivers : Yaesu FT-897
  • Using Crystal Filters in FT-897D - Installing these filters is a big improvement in the quality of the rig of the Yaesu FT-897D
    [ Hits: 3388 | Votes: 4 | Rating: 5.5 ]
Shopping and Services : Cables and Connectors
  • Electronix Express - Online shop for all electronics needs. Cables, Buzzers all kind of electronic components capacitors, inductors, relays, resistors crystals transformers, hardware like knobs screws nuts and washers, opto electronics, diodes and transistors, soldering desoldering products, test equipmemt and tools
    [ Hits: 1065 | Votes: 2 | Rating: 8.5 ]
Technical Reference : Filters
  • Cheap Crystal Filter - An economical way of building an SSB filter. The circuit is for a filter with a 6 DB band width of roughly 2.2 KHz.
    [ Hits: 496 | Votes: 0 | Rating: 0 ]
Technical Reference : HF Radios
  • Stingray Marine Transceiver - Recently, at the Ballarat Hamfest, the author acquired an old Marine transceiver for just $10, charmed by its sturdy construction and waterproofing. Made by Findlay Communications in Sydney, this crystal-controlled transceiver had been dormant but was reinvigorated with minor fixes. A manual was sourced, and further repairs were made, including an ingenious crystal oscillator replacement using an Si5351a controlled by an Arduino. The refurbished radio, complete with a fresh coat of paint and added customizations, is now operational for 160m AM and 30m SSB. A successful and cost-effective restoration.
    [ Hits: 55 | Votes: 0 | Rating: 0 ]
Technical Reference : Test Equipment
  • Simple test equipment to build - A field strength meter, a crystal tester and a capacitance meter by Peter Parker VK3YE
    [ Hits: 1315 | Votes: 0 | Rating: 0 ]
Technical Reference : Test Equipment : RF Sweep Generator
  • Simple Hartley Sweeper - This sweeper built for a narrow bandwidth filter adjustment, use a simple 555 version sawtooth wave generator.
    [ Hits: 759 | Votes: 0 | Rating: 0 ]
Technical Reference : Test Equipment : Signal Generator
  • Germanium Noise Generator - This generator requires 100volts supply at 5mA. A 0 -5 mA meter inserted at J1 measures the crystal current.
    [ Hits: 367 | Votes: 0 | Rating: 0 ]
Technical Reference : Vector Network Analyzer
  • Measuring with a MiniVNA - Measuring technicques using a MiniVNA, author describes how to determine and unknown inductance, or how to determine an unknown capacitance, crystals, how determine insertion loss and directional attenuation of couples and power dividers, coax switches or even common mode chockes.
    [ Hits: 185 | Votes: 1 | Rating: 1 ]

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