crystal radio

crystal radio

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• Icom 706MkIIG Frequency Calibration - Unlike older radios, the 706 uses only one crystal oscillator (called the Master Oscillator). All other frequencies in the radio (L.O., 3-4 I.F. stages, VFO, and CW-offset) are computer-derived from the Master Oscillator. This makes it relatively simple to frequency-align the radio, so that it agrees with the Frequency Display in all modes.
  [ Hits: 214 | Votes: 2 | Rating: 9 ]

• 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: 61 | Votes: 0 | Rating: 0 ]

• Crystalradio.net - Dedicated to the preservation, experimentation, and advancement of crystal radios
  [ Hits: 216 | Votes: 0 | Rating: 0 ]
• How a Crystal Radio Works - Basics of crystal radios receivers and basic working priciples
  [ Hits: 484 | Votes: 5 | Rating: 7.8 ]
• Crystal Radio Circuits - Collection of several Crystal Radio receiver circuits with schematics diagrams and pictures
  [ Hits: 637 | Votes: 1 | Rating: 10 ]
• VU2NAN Crystal Radio - VU2NAN Nandu's Crystal Radio Pages
  [ Hits: 287 | Votes: 1 | Rating: 8 ]
• UHF Crystal Radio - A simple UHF Crystal Radio wired up to check for reception of VHF/UHF signals in the vicinity of the shack.
  [ Hits: 720 | Votes: 5 | Rating: 7.6 ]
• A Simple Radio Receiver - A very simple experimental short wave radio receiver. This is basically just a crystal radio with two stages of transistor amplification afterwards made with scrap components.
  [ Hits: 346 | Votes: 2 | Rating: 9 ]

• 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: 186 | Votes: 1 | Rating: 1 ]

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