Minute sound hearing transmitter of the external needle microphone
KT-400N

Outline
  • The small, efficient hearing transmitter of the outside needle mike with the lead line.
  • It penetrates there if there are 2milli hole (1.5 externals millis of the needle) and the conversation of the next room flies by the electric wave if it sets it up because needle (injection needle) mike has ten-centimeter length of the needle. The option and there is an injection needle of 20 centimeters (\3,000), too.
  • The tone quality correction circuit by which tone quality becomes the best with the injection needle installed is built into. If the injection needle is detached, tone quality becomes amusing.
  • Because ALC (automatic volume adjustment circuit) is built into, it is possible to hear it from the faint sound to a large sound at the same level.
  • Because the lithem battery is used, it differs from the dry battery, and it operates in an always steady state regardless of an external temperature or the use time (in the tolerance).
  • The battery longevity uses continuously and is about three. Continuous use on about the 30th that uses battery adaptor AD-T is possible.
  • The distance range of the electric wave is from 100 to 200m. When Yagi Antenna is used for the receiver. The distance range is extended to 1.5 times. The distance range shortens in a place that builds by in the building and the house and is crowded.
  • UHF band multi channel receiver that is special receiver (KUR-400) or on the market is used for the reception. Please use a special receiver when you hear a faint voice like the whispery voice etc.Because the noise that the receiver puts out is a lot of, it is possible to hardly catch it with a multi channel receiver on the market.
  • It is possible to record to the recorder of a musical sensitivity wisdom start method on the market for a long time automatically.
Directions
  • The slide is done thumbing ahead, and because it detaches, and there is space that puts the battery (lithium CR2) internally, the battery is put there and the lid is done doing the lid of the case. It is noted that it doesn't make a mistake in the battery polarity.
  • It sets it up in the place where it wants to hear the needle mike. When the switch on the side of the case is turned on to a red point, the electric wave is sent. The main body is only put on a suitable place now.
  • Setting up vertically transmits the antenna and the electric wave is transmitted efficiently. How to transmit the electric wave worsens in a place etc. that build by the house in the building and are crowded, and the distance that can be received shortens. The distance range shortens especially in case of the state that the antenna sticks to a metallic board etc.Please set up the antenna several centimeters or more apart from the metallic objects. It puts in a metallic box etc. , and the distance range shortens extremely. 1/4ƒÉ straight line becomes the antenna than a helical antenna and the distance range becomes good somewhat.
  • Automatically, it is possible to record to the recorder with a voice start recording function on the market by using the recording code of the attachment for special receiver (KUR-400). Please confirm the operation when recording automatically. The sound is emitted with the portable radio etc. , the electric wave is sent, and it is confirmed whether for the receiver not to have the noise and to hear it beautifully. The recording code of the receiver attachment is pierced to the earphone terminal of the receiver and the external mike terminal of the recorder afterwards, it sets in the sound start, and the recording button is pushed. Please confirm whether the recording of the recorder stops when there is no sound. It is possible to hear it collectively at it necessary later because the mechanism recorded only when the sound is perceived.
  • If the latest IC recorder is used, it is possible possible to record 20 hours or more continuously, to take into the personal computer, to preserve, and to reproduce.
Specification of KT-400N
      Minute sound hearing transmitter of the external needle microphone
      Modulation system Narrowband frequency modulation (Maximum frequency devieition +-10Khz).
      Frequency of transmitter
          A channel is 398.605Mhz.
          B channel is 399.455Mhz.
          C channel is 399.030Mhz. Either one channel.
      Supply voltage 3V (lithium battery CR-2)
      Consumption current About 9mA
      Continuation use time About 70 hours.
      High frequency output About 5mW.
      Sprias Less than [ -50db ].
      Antenna screw terminal 1/4 lambda shape storage type
          Soft straight line (18cm) or screw terminal helical antenna (option).
      Outside size 25mm long, the side of 33mm, height of 18mm.
      Operating temperature -10 degree-C - 50 degree C.
      Weight About 43g.

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.
  • Although it will enter if 2CR 1/3H (6V) of a lithium battery are put in by chance, although an electric wave output increases about 5 times, dispatch frequency falls several kilohertz and tone quality becomes amusing. In the summer which exceeds 30 degrees C, since internal parts are damaged immediately, please do not use by any means.