Powerful type minute sound hearing transmitter for a long time
KT-800


Outline
  • KT-800 is high performance and strong power tapping transmitter for a long time use.
  • Four dry cell U3 batteries are used and if a alkali battery is used, the battery life to be 3 days and a half. With oxide battery is useful for 5 days. Lithium battery is useful for 7 days in operation continuously.
  • The particular circuit to supply voltage steadily is built by which the power to release wave is no problem just before the battery life is completely exhausted even the voltage of the battery is low down on the way.
  • The available distance is 300-600 meters but, it may be shorter in the place where many houses and buildings are crowded.
  • The (KUR-400) and conventional one for UHF band types sold in the market are available However, an exclusive receiver must be used when to catch a very low voice in whisper. Conventional one has a problem to hear due to noise makes by itself.
  • If Yagi Antenna is used for a receiver, a receivable distance will be prolonged by about 1.5 times.
  • Prolonged automatic recording is made to the recorder of a commercial sound perception starting system.
Directions
  • Since there is a space which removes the screw which has stopped the lid with the attached driver, is made to slide the lid at the point of the thumb, removes it, and puts a battery into an inside, a battery is put in for direction there to prevent mistakes, and a lid is carried out. A lid will be stabilized if the screw is also fastened. An electric wave will be sent if the switch in a lid and opposite side is put into ON direction. The rest is only established in a suitable place.
  • The antenna is the screw formula of a screw. An electric wave is transmitted having stood efficiently [ direction ] perpendicularly. In the inside of a building, and the place where the house builds and is crowded, how to transmit an electric wave becomes bad and a receivable distance becomes short. Notification distance will become short especially if it is in the state where an antenna adheres to a metal plate etc. Please separate an antenna centimeters [ several ] or more from a metal thing, and install it. Notification distance will become extremely short if it puts into inside, such as a metal box. As for notification distance, as for an antenna, 1 / the 4lambda strait wire becomes good somewhat from a helical antenna.
  • Automatic recording can also be carried out to the recorder with the commercial voice starting recording function using the recording code of attachment in an exclusive receiver (KUR-400). When you make it automatic recording, please be sure to carry out a check of operation. It checks whether make sound with pocket radio etc., an electric wave is made to send, there is no noise in a receiver, and it is finely audible. The recording code of receiver attachment is put with after that in the earphone terminal of a receiver, and the external microphone terminal of a recorder, it sets to sound starting, and a recording button is pushed. When there is no sound, please be sure to check whether the recording of a recorder has stopped. Since it is the mechanism recorded only when sound has been noticed, when required, it can be heard collectively later.
  • If the newest digital recorder is used, more than 10 hour can be recorded continuously, and moreover, it can take in and save and reproduce in a personal computer.

Specification of KT-800
    Minute sound hearing transmitter for a long time.
    Moduratin system Narrow-band frequency modulation
        (maximum frequency deviation +- 10Khz)
    Battery voltage 6V (dry cell U3 x4)
    Consumption current About 20mA
    Continuation use time About 80 hours
    High frequency output About 20mW
    Dispatch frequency Three kinds
        A channel 398.605Mhz
        B channel 399.455Mhz
        C channel 399.030Mhz One either
    Sprias Less than [ -50db ].
    Antenna 1/ 4 lambda form memory type strait wire (18cm) with a screw ,or
          helical antenna with a screw (option)
    Outside size 68mm long, 65mm wide, height 20mm
    Operating temperature -10 degrees C ~ 50 degree-C
    Weight About 105g (A battery is included. )
Notes
  • Be careful of the polarity of a battery to prevent mistakes absolutely. If a switch is turned ON by mistake, internal apparatus is damaged, and if it damages, there is danger of emitting smoke.