Simple FM Receiver (DIY/Learning)

Simplest possible FM receiver board, useful for learning or as an easy DIY project

Notes:

• Q1/Q2 must be BF199 RF transistors
• The combination of R1+R2 should be around 12k. 2 positions are provided for extra flexibility, if you don't have a 12k resistor you can choose for example: R1=10k R2=2k
• L1 (represented by an inductor in the 3D image) should be a coil of 5 turns made from copper wire of small diameter
• As the antenna it's possible to use a short piece of wire, the exact length is not critical but can be "tuned" by starting with a long wire and cutting it if necessary