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Last Updated
03/31/2019
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Detailed entries for one subject from the INDEX TO HOW TO DO IT INFORMATION. |
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TELEPHONE LISTENING & RECORDING DEVICE sa TELEPHONE ANSWERING MACHINE x TELEPHONE RECORDING DEVICE xx TELEPHONE Telephone line grabber. This listening circuit can be called from a remote phone so you can intercept phone conversations or monitor room activities. Est. cost: $100 (kit). Tele monitor lets you keep an audible record of your telephone conversations. This device activates a recorder when the phone is picked up. Est. cost: $25 Induction pickup coil for recording or amplifying telephone conversations. The 008 Tele-Spy, a device which is connected to a telephone line. When the device is turned on, it will answer the telephone before it rings and enable the caller to hear every sound in the room for a specified length of time, and then break the circuit. Phone beeper. Device emits an audible beep every 15 seconds. Needed to comply with FCC regulations for recording telephone conversations. This battery powered device has five transistors. Est. cost: $10. Telephone line grabber. This listening circuit can be called from a remote phone so you can intercept phone conversations or monitor room activities. Telephone projects for the hobbyist. (1) Tele-Guard allows you to detect a listening device (bug) or an open telephone extension. (2) Telephone hold button. (3) Telephone melody ringer. Circuit for a "telephone bug" which is wired into a telephone circuit and allows you to eavesdrop on a ordinary FM receiver. Telephone transmitter lets you monitor a phone call on any transistor radio. Switch turns on a tape recorder whenever the telephone is off-hook. Unlock the mystery of voice/remote activation circuits. Expand the usefulness of portable cassette recorders with these circuits. (1) Extended-play circuit slows down the rate of tape travel. (2) Sound-activated tape switch starts recorder when sound is detected. (3) Telephone auto-record circuit records telephone calls coming in and going out from the same phone line. The Frustrator. Phone device thwarts would-be telephone pitchmen and other annoying callers, but lets through calls you want to receive. The ringing phone is answered with silence, but voice or Touch-Tone signals are heard on a speaker. You have 30 seconds to decide to "answer" the phone yourself. Tattle Tale. A unique home or office intruder and emergency monitor that you phone to find out if all is well. Can be used to monitor up to three emergency situations (breakin, fire, flood, heating/cooling failure, etc.). Telephone transmitter. Connected in series with a phone line, this device "steals" power from the phone line and transmits both sides of a conversation to an FM radio. Est. cost: $10 (kit). Interface circuit for attaching a cassette recorder to the phone line draws operating power from the telephone line itself. This recorder starts whenever a phone is taken off hook or whenever an answering machine is activated. Used to capture all telephone conversations. Tele monitor automatically activates a recorder to keep a log of all calls, incoming or outgoing. Est. cost: $25. Telephone accessory circuit will trigger any tape recorder to take messages. Telephone circuit parade. (1) Neon lamp acts as a ring indicator. (2) Telephone recording control will activate a tape recorder any time the phone is taken off hook. (3) Telephone indicator (tester) will tell when a phone is off hook, the dialing method used, and which digit was pressed or dialed. Build an audio interface for your telephone to record conversations with the highest possible audio quality. Est. cost: $15 (kit). Build a telephone transmitter. Listen-in on telephone conversations on any FM radio. Transmits both sides of a conversation to an FM radio tuned to between 90 and 95 MHz. Est. cost: $10 (kit). Telephone pickup coil slips over the receiver. Build this remote telephone ear. Lets you monitor sounds in your home or office when you call your telephone from a remote location. Record/play telephone accessory. Switch will turn a tape recorder on when receiver is lifted. Use it to record phone conversations and to play back the recording. Circuit that turns on a cassette recorder whenever the telephone rings so you can tape your calls. | |||||||||
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