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I recently bought a proxmark from hackable-devices, but my antenna sucked. I then bought an HF antenna from proxmark3.com. The antenna characteristics are:
proxmark3> hw tune
#db# Measuring antenna characteristics, please wait.
proxmark3>
# LF antenna: 0.00 V @ 125.00 kHz
# LF antenna: 0.00 V @ 134.00 kHz
# LF optimal: 0.00 V @ 12000.00 kHz
# HF antenna: 7.77 V @ 13.56 MHz
# Your LF antenna is unusable.
I try to get a read on the card and this happens:
proxmark3> hf 14a reader
read failed: could not detach kernel driver from interface 0: No data available(-19)!
Trying to reopen device...
[proxmark3 resets]
My Proxmark3 came flashed with this firmware:
proxmark3> hw version
#db# Prox/RFID mark3 RFID instrument
#db# bootrom: svn 442 2010-06-04 05:42:52
#db# os: svn 442 2010-06-04 05:42:54
#db# FPGA image built on 2009/12/ 8 at 8: 3:54
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