Please Remember:
New circuits are updated regularly and listed in date order on the update page. If you have problems try my help page and remember that most circuits on this site use SI Notation. Due to the volume of email that I receive each day, I regret that I can only answer questions about circuits featured on my site. You may find the Circuit Index useful.

For help or to submit a circuit 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 web site
33. 49MHz Walkie Talkie Circuit External Link
34. Medium Wave DX Receiver external link 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 Receiverby Rodney Byne
40. Stereo FM Transmitter