Originally posted by CDI
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I wanted to somehow verify the operation of the various stages, I worry about the non-detection in all metal and do not know if it depends on the incorrect phase shift (20 degrees).
it happens that the pin 6 U1 I measure 4volt pp targhet detects and performs discrimination mode but not detected in all mode.
if instead perfected the nulling for 400millivolt to pin6 U1 detects all metal but does not detect it discriminates so discrimination
or should one or the other goes, I read somewhere that the phase difference must be 180 degrees, is the problem?
sorry for the bad English !!
coils TX 6mH RX 6.6mH
thank you
John
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