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Jonor you are right, that small antenna works GREAT with small tags! Thank you man !!!
thanks.
I created my antenna with 6 laps and Cable 1.2mm . The voltage is too low ... but I read more or less well (25 % of the time correct reading ) .
As I can improve it ?
proxmark3> # LF antenna: 0.00 V @ 125.00 kHz
proxmark3> # LF antenna: 0.00 V @ 134.00 kHz
proxmark3> # LF optimal: 0.00 V @ 12000.00 kHz
proxmark3> # HF antenna: 3.00 V @ 13.56 MHz
proxmark3> # Your LF antenna is unusable.
proxmark3> # Your HF antenna is marginal.