[![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]: https://electronics.stackexchange.com/questions/217083/simplest-fm-radio-receiver