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#1 2011-04-08 18:02:49

vivat
Contributor
Registered: 2010-10-26
Posts: 332

How to build LF antenna?

I was trying to build LF antenna for 2 times. I have used ~100 loops of 0.125 mm emanuel cable.
26403453.th.jpg

Here is tune output:

>> Started prox, built Sep  5 2009 16:26:21
>> Connected to device
> tune
#db# Measuring antenna characteristics, please wait.


# LF antenna:  6.04 V @   125.00 kHz
# LF antenna:  5.77 V @   134.00 kHz
# LF optimal: 41.49 V @   260.87 kHz
# HF antenna:  0.06 V @    13.56 MHz
# Your HF antenna is unusable.

What is wrong? I have built my HF antenna without problems.

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#2 2011-04-16 15:08:36

vivat
Contributor
Registered: 2010-10-26
Posts: 332

Re: How to build LF antenna?

Well. 3rd try was succesfull, I have used another emanuel cable, 0.13 mm; ~ 100 loops.

>> Started prox, built Sep  5 2009 16:26:21
>> Connected to device
> tune
#db# Measuring antenna characteristics, please wait.


# LF antenna: 19.07 V @   125.00 kHz
# LF antenna: 41.09 V @   134.00 kHz
# LF optimal: 41.09 V @   133.33 kHz
# HF antenna:  0.06 V @    13.56 MHz
# Your HF antenna is unusable.

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#3 2014-02-09 10:45:34

gaucho
Contributor
From: France
Registered: 2010-06-15
Posts: 428
Website

Re: How to build LF antenna?

which is the diameter? the width? the height? (a,b,c in the datasheet that you linked on this thread http://www.proxmark.org/forum/viewtopic.php?id=1110 )
could it be that your first attempt failed bacause of the way you placed the wire?

Last edited by gaucho (2014-02-09 10:47:35)


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