Radio Circuits and Schematics
Please Note:
This section includes receiver, transmitter, and antenna circuits, field strength and antenna tuner schematics. All circuits are listed alphabetically on the Circuit Index page and in date order on the update page. All contributors are listed on the credits page.

If you have problems try my help page first. Most circuits on this site use SI Notation. Due to large volumes of email, I regret that I can only answer questions about circuits on my site.

For help or to contribute please email me
  1. AM Receiver
  2. MW Active Antenna
  3. Q- Multiplying Loop Antenna
  4. 4 Band Double Tuned Preselector
  5. ZN414 Portable AM Receiver
  6. SW Receiver using the ZN414
  7. 2 Transistor FM Transmitter
  8. FM Transmitter
  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 blog
  33. 49MHz Walkie Talkie Circuit External Link
  34. Medium Wave DX Receiver external link (broken being rebuilt) to Duncan's in New Zealand
  35. 136 KHz Receiver by Claudio Pozzi, IK2PII
  36. 40 Meter Popcorn Superhet Receiver by VE7BPO
  37. Long Range FM Transmitter by Viswanathan Prakash
  38. Tracking Transmitter
  39. MSF Receiver Direct Conversion Receiver by Rodney Byne
  40. Stereo FM Transmitter
  41. MiniWhip An active antenna for VLF to Shortwave external link to website of Roelof Bakker, PA0RDT
  42. SW Regenerative Receiver by Ramon Vargas
  43. Germanium Transustor Crystal Receiver by Chad C
  44. Multi Frequency AM Transmitter
  45. Hybrid Regenerative AM BCB Receiver by Ramon Vargas
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