Need shematic of white's BC4

[jroux]

HI all,
I've a problem with my beachcomber 4, it not work very fine, max depth in air test is 10cm for a coin of one euro.
Impossible to have the shématic on google, i phone to white's company but any helps from them
It's possible to improve the performances with some regulations on the pcb or on the coil.
Thank you in advance for any answer

[Carl-NC]

The BC4 is a very old detector and 10cm on a Euro may be all it can do, I don't know for sure.

[jroux]

Ok thanks, i also think.