Proxmark3 community

Apt-Get

Contributor

Registered: 2015-12-23

Posts: 111

Proxmark 3 v2 Elechouse Antenna Voltage Issue to make note of.

Just a heads up to those who have a PM3 v2 From elechouse.

on the PM3 v2 when you mount the Antennas like this i would get this reading from hw tune
# LF antenna: 45.10 V @   125.00 kHz         
# LF antenna: 20.35 V @   134.00 kHz         
# LF optimal: 46.20 V @   123.71 kHz         
# HF antenna: 27.51 V @    13.56 MHz         
Displaying LF tuning graph. Divisor 89 is 134khz, 95 is 125khz.

cannot do anything to small tags. proxmark read and writes Barely Worked..
now look at setup #2

after moving the antennas like this I get these readings.
# LF antenna: 35.20 V @   125.00 kHz         
# LF antenna: 23.51 V @   134.00 kHz         
# LF optimal: 35.89 V @   126.32 kHz         
# HF antenna: 27.47 V @    13.56 MHz         
Displaying LF tuning graph. Divisor 89 is 134khz, 95 is 125khz.

Now my tags detect, read, and write just fine!!
There must be enough Interference with the Board or the bend in the cable to make a difference in the voltage.
Basicaly 45v is too loud to write tags, Especially small ones like keyfobs.
Get it under 36v and i have not had any issues.

Thanks for the tip Marshmellow!

Theo

Contributor

Registered: 2016-03-11

Posts: 3

Re: Proxmark 3 v2 Elechouse Antenna Voltage Issue to make note of.

Hi,

I'm very interested by your configuration, but unfortunately I can't see the picture.

Am I the only one ?

Thanks

lockakey

Contributor

Registered: 2015-10-10

Posts: 22

Re: Proxmark 3 v2 Elechouse Antenna Voltage Issue to make note of.

Id love to see the picture too, im having the same issue

osys

Contributor

From: Nearby

Registered: 2016-03-28

Posts: 62

Re: Proxmark 3 v2 Elechouse Antenna Voltage Issue to make note of.

@Apt-Get I have the same issue, can you please share the picture among forum members. Thank you!

timififilger

Contributor

Registered: 2012-08-28

Posts: 17

Re: Proxmark 3 v2 Elechouse Antenna Voltage Issue to make note of.

let me see the picture too!

osys

Contributor

From: Nearby

Registered: 2016-03-28

Posts: 62

Re: Proxmark 3 v2 Elechouse Antenna Voltage Issue to make note of.

See this topic