This metal detector is of the older variety, however, very sensitive. It is not extremely temperature stable and as such will require that you allow it to adjust to the relative temperature in which you are using it. Beyond that, it is extremely sensitive and capable of detecting very small objects at a depth of at least 8 inches. The oscillators in this circuit operate just below the bottom end of the AM Broadcast Band at a frequency of 494 KHZ. Although this is a bit high for a BFO metal detector, it allows for the finding of very small objects such as small rings and coins

ADRESİ :http://bobsdata.com/metaldetector/index.html

Linkback: BFO METAL DEDEKTÖR

Thank you for your helping my friend.

thanks diamondbrillant but i dont advice bfo
pi system is much more sensitive than bfo
yo can try delta pulse (pi)
good working

allah allah tutmayın bizi türkler geliyor  dünyaya acılıyoruz arkadaşlar farkındasınız herhalde emeği gecen arkadaşlara minnetarım

tercümeleride yazılsa benim gibi ingilizce özürlüler anlar.adam bizi öptüde niyeti ne anlamayınca gücüme gidiyor.ben simdi japonca yazıssam kızarsınız dimi.