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Radio bug

May 17, 2010 Electronics / Bugs for wiretapping 81 744 26

I propose a simple radio microphone circuit with a range of up to 30 meters. The signal can be received on the radio (cell phone, player or on a regular, etc.) If everything is assembled correctly works without settings.

The circuit uses only one transistor of the kt315 series (the store costs no more than 5 rubles) any microphone will do, I used the XF-180. It was attached with a player.

The coil contains 7 turns, I used 0.45mm, after you solder the coil, it is advisable to fill it with glue so that the turns do not move.
I think the length of the antenna you pick up the longer, the farther.
For food, you can use the crown.
The very idea of this microphone is that when it is received, the receiver does not hiss.

Enjoy eavesdropping.

come back

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Comments (26)

#1 mirex0123 Guests August 7, 2010 21:15
0

Tell me what the designations are in the scheme 36 12 8.2 0.1 and the very first thing is there without a designation! There are no such capacitors !!!!!!
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#2 NOTFRONT Guests August 7, 2010 22:37
1

The designations are all correct !!! 36 12 8.2 are capacitors with capacitance in PICOFARADES !, And 0.1 is in MICROFARADES!
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#3 mirex0123 Guests August 7, 2010 23:12
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and the turns on which rod should be wound ??
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#4 mirex0123 Guests August 7, 2010 23:12
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and the turns on which rod should be wound ????????????????????????????? ??? мм мм мм мм mmmm
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#5 NOTFRONT Guests August 8, 2010 08:24
0

coil - frameless
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#6 mirex0123 Guests August 8, 2010 21:15
0

or rather, from what material?!?!? I've been disassembling the old power supply from the computer, there are coils there! here there is a round rod I do not know what it is made of! will he go?!?!?!?! and how to determine the thickness of the wire?
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#7 [) eNiS Guests August 12, 2010 8:21 p.m.
0

on the rod from a regular gel pen
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#8 SVL Guests October 26, 2010 10:20 PM
0

healthy crap
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#9 Kiler Guests November 9, 2010 11:21
1

And in what range does this cockroach work?
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#10 serdj95 Guests March 3, 2011 15:01
0

I'm interested too!?
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#11 NOTFRONT Guests March 3, 2011 18:34
1

88-110 MHz, depending on how you configure.
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#12 serdj95 Guests March 3, 2011 18:42
0

Thank!
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#13 Tyger Guests May 6, 2011 15:52
0

But what is it on the diagram for the designation of 1000 it is microfarads or picofarads and in the beginning also that it is there without a designation next to the battery. And another such question is there is a 160 volt 0.1-millifarad Conder, can they replace the given Conder in the diagram, and if there is no Conder picofarads, what can I replace them in advance thanks. !!
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#14 NOTFRONT Guests May 6, 2011 16:29
0

1000 picoFarad. There is no battery in the diagram! 1000 pF at 0.1 uF cannot be replaced.
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#15 raar Guests May 20, 2011 18:46
0

what kind of capacitor after the terminals from the battery is there the rating is not indicated but on the picture of the finished bug
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#16 NOTFRONT Guests May 20, 2011 19:16
1

from 1000 pcF to 1 uF.
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#17 raar Guests May 20, 2011 19:28
1

without it, the circuit will not work? and can I put a variable in its place?
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#18 raar Guests May 20, 2011 20:55
2

I set 0.1 microfarads at what frequency will it broadcast?
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#19 NOTFRONT Guests May 20, 2011 21:31
1

what nonsense are you talking about ?! If you do not understand electronics, then better leave this thing!
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#20 Rybak27 Guests May 27, 2011 14:46
1

Everything will work. Look for your signal on the FM band.
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#21 cat Guests February 19, 2012 23:45
1

dear ones. Sorry, but I didn’t understand a bit, where on the left on the diagram is the output for plus and minus, power or not? If not, what is there? And if so, what kind of food?

[b] cat [/ b] For this you need to learn how to use your eyes, others will not help you ....
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#22 Artyom Guests August 18, 2013 20:36
1

And if I put not 1000, but 4000 will work
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#23 askar1107 Guests January 10, 2014 19:29
0

what is the resistor on top? what is the face value?
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#24 askar1107 Guests January 10, 2014 19:30
0

tank is not indicated on the left
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#25 xenon2707 Guests May 17, 2015 21:45
0

Gathered on the breadboard from the old TV. The first time a bug did. After 20 minutes I was able to catch at a frequency of 108.
I had a very weak signal, but still was)
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#26 Pirate_Radio_Pushka_87.7FM Guests May 31, 2018 10:26 p.m.
1

You need 20 turns per coil to operate in the HF band and the range will increase by at least 50 kilometers.
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