[![radio][1]][1]

[FM Crystal Radio][2]

**L** -  4 turns #18 copper or silver wire, 12mm inside diameter, tapped at 2.5 turns

**Ant** - 7 inches of #18 bare copper wire

**C1** - 18 pf ceramic capacitor

**C2** - 50 pf air variable capacitor(? for 93.5MHz)

**D** - 1N34 diode or rock crystal

**R** - 150K resistor

1. how to tune [simplest fm][3] at 93.5MHz radio station by fixed value of C1(18pf), C2 ? (any formula would very helpful so that i can tune to any radio station)

2. can i use diode 1N4007 instead of 1N34 ?


  [1]: https://i.sstatic.net/epRz4.jpg
  [2]: http://solomonsmusic.net/FM_CrystalRadio.html
  [3]: http://electronics.stackexchange.com/questions/217083/simplest-fm-radio-receiver