This is a very simple FM receiver which build based on one transistor only. No chip or another active component. The output is connected to earphones, you need an amplifier circuit if you want to listen the radio with a loudspeaker.
| Part designator | Part description |
| C1a,C1b | 10 pf, 50 v, ceramic disc capacitor |
| C2 | 22 pf, 50 v, ceramic disc capacitor |
| C3 | RF tuning capacitor |
| C4 | 330 pf, 50 v, ceramic disc capacitor |
| C5,C8 | 0.001 uf, 50 v, ceramic disc capacitor |
| C6 | 0.22 uf, 50 v, film capacitor |
| C7 | 0.0047 uf, 50 v, ceramic disc capacitor |
| C9 | 22 uf, 16 v, electrolytic capacitor |
| D1 | TL431AIZ voltage control Zener (shunt regulator) |
| EPH1 | High impedance earphone |
| L2 | 22 uh RF choke |
| Q1 | 2N4416A JFET transistor |
| R1 | 470K, 1/4 w, resistor |
| R2, R3 | 1K, 1/4 w, resistor |
| R4 | 10K, 1/4 w, resistor |
| R5 | 1M, 1/4 w, resistor |
| R6 | 100 ohm, 1/4 w, resistor |
| S1 | Small SPST switch |
| screws for C3 | screws for mounting C3 (2 needed) |
| nylon screw | #4 nylon screw used for tuning C3 |
| battery connector | mini battery snap |
L1 determine the frequency of the radio, acts as the antenna, and is the primary adjustment for super-regeneration. Although it has many important jobs, it is easy to construct. Get any cylindrical object that is just under 1/2 inch (13 mm) in diameter. A thick pencil or a magic marker or large drill bit work just fine. #20 bare solid wire works the best, but any wire that holds its shape will do. Wind 6 turns tightly, side-by-side, on the cylinder, then slip the wire off. Spread the windings apart from each other so the whole coil is just under an inch (2.5 cm) long. Find the midpoint and solder a small wire for C2 there. Mount the ends of the wire on your circuit board keeping some clearance between the coil and the circuit board.
More instruction how to build this circuit, visit this page
The circuit is very simple, I will try it.
Circuit Diagram pls can u explain this receiver . thanks
there is no need external antenna for this circuit. The L1 is act as an antenna, it should be enough to catch the FM signal.
Does this really work cause i dont see any antennain it or any kind of reciever
can someone explain this receiver?
please upload mini project on to construct FM transmitter and FM Recevier It is very imp. to GTU B.E. Electronics and communication Student. I think u Providethis facility as soon as possible. thank you
i love this circuit good job but try and create more circuits like this one