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#1 2011-08-29 20:47:34

moebius
Contributor
Registered: 2011-03-10
Posts: 206

LF antenna and enclosure

I'm looking for an LF antenna (pcb one with cable like .com site) and an enclosure. For you to know, i'm from argentina. I can tranfer the payment via paypal.

Thanx!

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#2 2011-10-21 14:09:02

laser
Contributor
Registered: 2011-06-23
Posts: 24

Re: LF antenna and enclosure

Hi, moebius

We have made LF antenna using the pcb provided by author J.Westhues, we only alter the adaptor(USB adaptor). and thanks jose from spain, he help me alter the adapt connector.
13 dollars pcs.(including LF antenna and a adaptor,usb to mini 4pin)


8b1d9686-a062-434c-a4e9-88ddc4655494.jpg
ffbe2af4-9f07-4aaf-bd92-0cac7c1fa5ce.jpg
6c443a1c-46d5-4997-902c-6e530400c146.jpg
1bf35c47-428d-4bd3-a1dd-8ddeb470d72e.jpg
2728250d-4f24-4317-abdb-c6e16b35cec8.jpg
914433dc-9a61-4354-a00c-68d5e7e60a71.jpg
1b1915f0-8188-403e-90a2-020573a77c05.jpg
a7d36a8b-6f37-440b-9d96-46571e42e000.jpg
2bc9acea-700f-4399-89aa-b504d82c657e.jpg
309976ab-a54f-407f-a07a-712eb9e1510c.jpg
654e053a-c5c2-4349-9f92-0879db63678c.jpg
40a4cc83-008a-48a0-b556-4b40db4dd290.jpg

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#3 2011-10-21 14:19:35

thefkboss
Contributor
Registered: 2008-10-26
Posts: 198

Re: LF antenna and enclosure

laser wrote:

and thanks jose from spain, he help me alter the adapt connector..

you are welcome

laser is a very good seller.
everything is correct, very fast the delivery, great prices.....
always answer my emails.


is a great seller

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#4 2011-10-22 18:06:17

moebius
Contributor
Registered: 2011-03-10
Posts: 206

Re: LF antenna and enclosure

thefkboss wrote:
laser wrote:

and thanks jose from spain, he help me alter the adapt connector..

you are welcome

laser is a very good seller.
everything is correct, very fast the delivery, great prices.....
always answer my emails.


is a great seller

no doubt!

and very good stuff!

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#5 2011-10-23 12:43:02

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

Re: LF antenna and enclosure

40a4cc83-008a-48a0-b556-4b40db4dd290.jpg
Your antenna's voltage is low. It should be more than 20 volts for good LF antenna.

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#6 2011-10-23 18:40:15

jonor
Contributor
Registered: 2009-09-17
Posts: 97

Re: LF antenna and enclosure

With my antenna I have this voltage:

proxmark3> hw tune
#db# Measuring antenna characteristics, please wait.


# LF antenna: 41.09 V @   125.00 kHz
# LF antenna: 27.93 V @   134.00 kHz
# LF optimal: 41.22 V @   130.43 kHz
vivat wrote:

Your antenna's voltage is low. It should be more than 20 volts for good LF antenna.

Maybe the capacitor on this proxmark3 not are in resonance with the antenna. In my proxmark3 I added 100pF in parallel to the original capacitor and I increased the voltage from 37V for 125 KHz and from 20V for 134KHz

Last edited by jonor (2011-10-23 18:42:06)

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#7 2011-10-23 19:56:04

Bugman1400
Contributor
Registered: 2010-12-20
Posts: 132

Re: LF antenna and enclosure

I'd be careful with too high a voltage. Remember what the antennae feeds into. Now check the rating of that device.

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#8 2011-10-24 18:26:11

spinoinside
Member
From: Italy
Registered: 2010-02-06
Posts: 14

Re: LF antenna and enclosure

jonor wrote:

With my antenna I have this voltage:

proxmark3> hw tune
#db# Measuring antenna characteristics, please wait.


# LF antenna: 41.09 V @   125.00 kHz
# LF antenna: 27.93 V @   134.00 kHz
# LF optimal: 41.22 V @   130.43 kHz
vivat wrote:

Your antenna's voltage is low. It should be more than 20 volts for good LF antenna.

Maybe the capacitor on this proxmark3 not are in resonance with the antenna. In my proxmark3 I added 100pF in parallel to the original capacitor and I increased the voltage from 37V for 125 KHz and from 20V for 134KHz

Can i see a photo of the antenna ???
thanks

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#9 2011-10-24 22:34:03

jonor
Contributor
Registered: 2009-09-17
Posts: 97

Re: LF antenna and enclosure

antenna.jpg

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