THRU-THE-EARTH RADIOLOCATION
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    • Basic-1 & Basic2 Radios
    • Locating Ground Zero
    • DQ Radiolocation Receivers
    • Class-E Underground beacon for DQ receivers >
      • Best Inductance Equation
    • SSB voice Transverter
    • The Single-Wire Ultraphone
  • Technical Articles
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Low Frequency Radio and Single-Wire Phone Links

  • Build a wide-range RLC meter using your computer sound card, almost for free.
  • Low Frequency transmit & receive antennas, loops, losses, measure ERP, toroid inductor & transformer design
  • NSS communications & Electronics Section
  • Dave Gibsons Radiolocation page
  • Paul Jorgensons Cave Radios including HF Thru-The-Earth
  • The Nicola-3 earth-current voice cave radio
  • Cave radio and Electronics Group of the BCRA
  • Natural VLF Radio
  • Long Wave Club of America
  • SAQ operational high power 17.2kHz mechanical CW transmitter
  • All about the new 2200 and 630meter ham bands
  • National Speleological Society
  • All about the Michiephone Single Wire Telephone
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