Simple Phone Tap

Author	Views	Views Today	Rank	Comments
Derek Tombrello	95,071	112		71

This circuit is extremely simple, therefore there is less chance of any problems. It can be placed anywhere on the phone line and it will record any conversation on any phone on that line.

Please note: I have received several emails saying that this circuit will not work and that it may hold your line off hook and to me it looks like it will (it would put quite a load on the phone line). For some, it has worked fine. Build at your own risk.

Schematic

Parts

Part Total Qty. Description Substitutions

R1 1 470 Ohm 1/4 Watt Resistor

R2 1 1K 1/4 Watt Resistor

R3 1 100K 1/4 Watt Resistor

R4 1 6K 1/4 Watt Resistor

C1, C2 2 0.01 uF 100V Ceramic Capacitor

K1 1 24VDC Reed Relay

MISC 1 Wire, Headphone Plugs, Phone Plug Or Alligator Clips

Notes

Email Derek Tombrello with comments, questions, etc.

To use the circuit, simply connect it in series to the phone. Then plug in the recorder. It will start recording when the phone is picked up.

The values of R1 and R2 may have to be adjusted, depending on the characteristics of the phone line it is connected to (they vary). If the R1+R2 combination is increased sufficiently (try 2.47K) then the circuit can be connected in parallel with the line, thus covering all attached devices. (Thanks to Mark Wright for the suggestion).

T.A. Betts offers this suggestion for getting this problematic circuit working: "If you drop the resistors and add a 2.2uF capacitor the line will not stay off hook. It blocks the DC from the moniter position."

Related Circuits

Ringing Phone Light Flasher, Phone Busy Indicator, FM Telephone Bug, Cut Phone Line Detector, Simple Phone Tap, Telephone Hold Button, Telephone Recorder, Remote Telephone Ringer

Comments

gypsey Simple Phone Tap Thursday, July 24, 2008 2:14:34 PM

I WOULD LOVE TO KNOW WHY MY MAN HAS A SECRET CELL .HE HAS 3,BUT I ONLY KNOW HE HAS 2.I WOULD LOVE TO TAP IT.PLEASE HELP..

anonymous Phone/Car/Cell-phone Tap Thursday, July 24, 2008 7:33:59 AM

I am afraid that my soon-to-be Ex-husband is taping my home/cell phone and also bugging my apartment and car. How can I find out which ones he has a tap on? Upto how far of a distance any tap would work

anonymous Simple Phone Tap Monday, July 14, 2008 6:21:02 AM

How can u check if your phone is tap

prarthnaanonymous Simple Phone Tap Wednesday, June 18, 2008 8:29:25 PM

Derek...I need to tap a landline number in Mumbai. I amnot a techie so wont be able to do it on my own. It is the last option I have to save my relationship. Can u please help me somehow?

anonymous Simple Phone Tap Thursday, June 12, 2008 7:58:45 AM

i live in the middle east...i have worked on quiet a couple of these interfaces. Would like to know if this interface would keep my phone off-hook? since i live in UAE i cant risk blowing up my buildings telephone fuse box, its better if someone gives me a feedback asap. THANKS ALOT =) . Would appreciate any sort of help =)

anonymous Simple Phone Tap Wednesday, June 04, 2008 4:38:45 PM

i think i was tapped b4 but have now changed my phone to a basic samsung phone without bluetooth can i still b tapped?

anonymous Simple Phone Tap Sunday, June 01, 2008 11:57:39 AM

is there a 800# to call to see if your phone is tapped???

NANI Simple Phone Tap Monday, May 19, 2008 1:50:06 AM

THE PHONE TAP IS VERY USE FULL TO US

anonymous Mobile Phone Tap Sunday, May 11, 2008 5:23:32 AM

well i was talkin 2 my frnd over d fone.i was abt to reply to a question wen i heard sum1 cough,quite a loud one.now i know its not me nor my frnd but a peculiar voice.so r der any possibilities of my or my frnds fone being tapped? plz reply..Thanks..
(Editor's notes: First of all, it's spelled: -talking -friend -the -phone -about -when -someone -are -there -friends -please Second, no. )

tarzan mobile phone tap Wednesday, April 23, 2008 10:03:08 AM

want to tap themobile phone which is not mine .plz do tell me the method of how to tap the moble phone through he inter net or i will give u the mobile phone number u can tap the mobile phone and can send in the recordings through the internet in my e- mail and iwill copy it done in the cd and plz do help me out and tell me how to copy the recordings in my cd.urgently waiting for your help.plz do help me out .thanx.

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gypsey	Simple Phone Tap	Thursday, July 24, 2008 2:14:34 PM
I WOULD LOVE TO KNOW WHY MY MAN HAS A SECRET CELL .HE HAS 3,BUT I ONLY KNOW HE HAS 2.I WOULD LOVE TO TAP IT.PLEASE HELP..
anonymous	Phone/Car/Cell-phone Tap	Thursday, July 24, 2008 7:33:59 AM
I am afraid that my soon-to-be Ex-husband is taping my home/cell phone and also bugging my apartment and car. How can I find out which ones he has a tap on? Upto how far of a distance any tap would work
anonymous	Simple Phone Tap	Monday, July 14, 2008 6:21:02 AM
How can u check if your phone is tap
prarthnaanonymous	Simple Phone Tap	Wednesday, June 18, 2008 8:29:25 PM
Derek...I need to tap a landline number in Mumbai. I amnot a techie so wont be able to do it on my own. It is the last option I have to save my relationship. Can u please help me somehow?
anonymous	Simple Phone Tap	Thursday, June 12, 2008 7:58:45 AM
i live in the middle east...i have worked on quiet a couple of these interfaces. Would like to know if this interface would keep my phone off-hook? since i live in UAE i cant risk blowing up my buildings telephone fuse box, its better if someone gives me a feedback asap. THANKS ALOT =) . Would appreciate any sort of help =)
anonymous	Simple Phone Tap	Wednesday, June 04, 2008 4:38:45 PM
i think i was tapped b4 but have now changed my phone to a basic samsung phone without bluetooth can i still b tapped?
anonymous	Simple Phone Tap	Sunday, June 01, 2008 11:57:39 AM
is there a 800# to call to see if your phone is tapped???
NANI	Simple Phone Tap	Monday, May 19, 2008 1:50:06 AM
THE PHONE TAP IS VERY USE FULL TO US
anonymous	Mobile Phone Tap	Sunday, May 11, 2008 5:23:32 AM
well i was talkin 2 my frnd over d fone.i was abt to reply to a question wen i heard sum1 cough,quite a loud one.now i know its not me nor my frnd but a peculiar voice.so r der any possibilities of my or my frnds fone being tapped? plz reply..Thanks.. (Editor's notes: First of all, it's spelled: -talking -friend -the -phone -about -when -someone -are -there -friends -please Second, no. )
tarzan	mobile phone tap	Wednesday, April 23, 2008 10:03:08 AM
want to tap themobile phone which is not mine .plz do tell me the method of how to tap the moble phone through he inter net or i will give u the mobile phone number u can tap the mobile phone and can send in the recordings through the internet in my e- mail and iwill copy it done in the cd and plz do help me out and tell me how to copy the recordings in my cd.urgently waiting for your help.plz do help me out .thanx.