Simple Phone Tap


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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

This the Schematic of the Simple Phone Tap

Parts

Part
Total Qty.
Description
Substitutions
R11470 Ohm 1/4 Watt Resistor
R211K 1/4 Watt Resistor
R31100K 1/4 Watt Resistor
R416K 1/4 Watt Resistor
C1, C220.01 uF 100V Ceramic Capacitor
K1124VDC Reed Relay
MISC1Wire, Headphone Plugs, Phone Plug Or Alligator Clips

Notes

  1. Email Derek Tombrello with comments, questions, etc.
  2. 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.
  3. 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).
  4. 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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