Radio Frequency Circuits

  1.    AM Receiver

  2.    MW Active Antenna by David Sayles

  3.    Q- Multiplying Loop Antenna ( David Sayles )

  4.    4 Band Double Tuned Preselector ( David Sayles )

  5.    ZN414 Portable AM Receiver

  6.    SW Receiver using the ZN414

  7.    2 Transistor FM Transmitter

  8.    FM Transmitter by David Sayles

  9.    FSM Field Strength Meter

  10.  Simple Field Strength Meter

  11.  4 Transistor Transmitter by Paul K Sherby

  12.  FM Transmitter with Opamp by Kamram Ahmed

  13.  UHF TV Preamplifier

  14.  ATL3 Loop Antenna by Graham Maynard

  15.  Surveillance Transmitter Detector

  16.  AM Transmitter

  17.  6 x 6 Antenna Loop by Graham Maynard

  18.  2 Transistor Transmitter by Rob

  19.  MPF102 FM Receiver by Patrick Cambre

  20.  SW RF Pre-Amplifier

  21.  Band 2 Preamplifier

  22.  Bipolar Regenerative receiver by Ramon Vargas

  23.  Crystal Controlled Oscillator by Ramon Vargas

  24.  Short Wave Regenerative Receiver by Ramon Vargas

  25.  FM transmitter by David Celestin

  26.  Automatic Repeater by Miroslav Adzic

  27.  MK484 AM Receiver by Chad Castagana

  28.  TV Transmitter by David Kwaku Celestin

  29.  The Modern Armstrong Regenerative Receiver (in PDF Format) by Ramon Vargas

  30.  30 Watt VHF Amplifier by David Celestin

  31.  Antenna Tuning Unit

  32.  Sensitive DX TRF Receiver external link to Husnu Kokturk's web site

  33.  49MHz Walkie Talkie Circuit External Link

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Content sourced from Zen Schematics