Transmitter connection with a telephone circuit parallel
PM-880


Outline
  • It installs in a telephone wire and detection is made impossible to various kinds of equipments which discover a transmitter.
  • This model is connected in parallel with a line. Since the voltage of a telephone wire is detected and it operates, only while using the telephone, the transmitter itself operates with the power supply of a built-in battery. Only when a telephone is used, a switch enters automatically. Since other models detect the current of a telephone wire and operate, although it is discovered by various line type detectors, this model is not discovered by any means.
  • Only while using the telephone and being, the electric wave of UHF is sent. In response to the electric wave, all the contents of the conversation of a telephone can be heard with a receiver.
  • Since it is small, it can also be used by the ability hiding in a rosette box and telephone.
  • For receiving, the receiver (KUR-400) of exclusive use and the receiver of commercial many channel receiver is used.
  • A receivable distance is about 150m.
  • It can be heard in the place about 1km away using relay equipment (RP-300A).
  • It can record automatically by exclusive automatic recorder (KKCR-360) or by using the recording code of exclusive receiver(KUR-400) attachment to the recorder with a commercial voice starting recording function. Since it can be collectively heard when later required, it is very convenient.
Directions
  • The lock of the root is removed, the telephone wire inserted in the rosette box is drawn out, and PM-880 are inserted in the receiving window of a rosette. The removed telephone wire is inserted in any of PM-880, or one receiving window. After attaching, it checks whether telephone surely operates. It can check by the ability of the sound which takes the receiver of telephone to it and is called "tuhu" to be heard.
  • When the line detector is installed, using the clip code of this device attachment, two portions of the line of some nakedness of the target telephone wire are added, and it connects. As for a detector, a line will react, if an instant is also cut.
  • Since there are three kinds of channels when hearing it with a receiver, it is not audible unless the channel is correct. The attainment distance of an electric wave is 30 or about 150m. It changes according to the situation of the place to install and the place to receive. In a building, distance becomes short.
  • Exchange of a battery opens a crevice in the whole little by little with the edge of a cutter etc., and pulls and opens it in the junction portion of a back lid with the finger of both hands later. Polarity is put in to prevent mistakes. And it presses down so that there may be no crevice between junction portions, and a lid is carried out. Since the capacity of a battery is large, it has even use of about 1 hour per day more than half a year.
  • For receiving, it uses an exclusive receiver (KUR-400). Commercial UHF band Although a multi-channel receiver can also be used, tone quality is bad or receiving distance becomes short.
  • When you make it automatic recording, please be sure to carry out a check of operation. It changes into the state where the weather report etc. is heard, there is no noise in a receiver, and it checks whether it is finely audible. After that, a receiver and a recorder are connected in recording code of receiver attachment, and the recording button of a sound starting system is pushed. Subsequently, it checks whether a telephone is hung up and the recording of a recorder has stopped. If the newest IC recorder is used, a part for 10 hours can be recorded continuously, and what was moreover taken in and saved in the personal computer can also be reproduced and heard.
  • In the case of a premise, please surely use an exclusive automatic recorder (KKCR-360) for a decipherment of a telephone number. In the case of a commercial recorder, it may be undecipherable enough.
Specification of PM-880
        Transmitter connection with a telephone circuit parallel
            (it sends electric wave only at the time of telephone use)
        Moduratin system Narrow-band frequency modulation
            (maximum frequency deviation +- 10Khz)
        Used battery Lithium battery 3V (CR123A)
        Consumption current About 8mA (at the time of telephone use)
        Continuation about 200 hours
        Dispatch output of an electric wave 3mW or less
        Dispatch frequency Three kinds
            A channel 398.605Mhz
            B channel 399.455Mhz
            C channel 399.030Mhz One either
        Connection code with terminal
        Outside size 45x40x22mm
        Weight About 30g (include battery)
Notes
  • This device cannot be used for a business phon. Although an obstacle is not generated at all in a circuit, when you use, please use on the responsibility of yourself not to become infringement of privacy.
  • Please do not attach a magnet in a main part. An electric wave does not become weak or it stops coming out..