SIMPLEST RADIO

Introduction:-

.DONT BE WONDERING HOW COULD I GET SUCH A SIMPLE ONE,JUST OBSERVE THIS CLOSELY THIS IS ENVELOP DETECTOR

The circuit is very simple with only 5 parts, but performs very nicely when used with the right size antenna

Diagram:-



click on the image for better view...................

Parts:-

Part	Total Qty.	Description	Substitutions
C1	1	Tuning Capacitor (See Notes)
D1	1	1N34 Germanium Diode
L1	1	Loopstick Antenna (See Notes)
SPKR1	1	Crystal Earphone
MISC	1	Wire, Board, Wire For Antenna, Knob For C1

Notes:-

1. C1 and L1 can be bought, or salvaged from an old AM radio (which is where I got mine). You may need to experiment with the connections on L1 in order to get the best (or any) signal.
2. You may or may not need the ground connection. I never use it and the radio usually works fine without it.
3. The bigger the antenna, the more stations you pick up and the louder you hear them. On my radio, I get about 10 stations, 3 of which are very loud in the earphone. Of course, not everyone has room for a 60' antenna...
4. A 47K resistor in parallel with the earphone will help properly load the detector