Single Transistor FM Receiver

[Tony Mac]

hello friends,.
can I ask what proper diameter and number of turns in the coil for base and collector (http://www.prism.gatech.edu/~jpalmer30/electronics/simplevhf.html) if I use 20pf variable capacitor in order to adjust frequency from 88Mhz to 108 Mhz?,. Thank You.,

 

[Arouse1973]

This looks a bit strange to your norm. But it looks like a regen receiver, the basic types are a bit old fashioned. This is because the feedback used to to radiate back out the antenna unless you had some buffer on the input. I dont know the correct answer but I would try 4 turns of say 0.5 to 1mm insulated wire around a pencil. Give that a try.
Adam