Receiver with the remote control function
KRT-400R


Outline
  • It is the same size as a world's smallest three channel receiver (KUR-400), and is the epoch-making product which carried out the condensation internal organs of the transmitter for control and receiver for remote control transmitters (KRT-400T).
  • A remote control transmitter and a set use. It is immediately receivable if a power supply switch is set to ON to hear it. If the switch of a remote control receiver is cut when stopping, dispatch of the electric wave of a remote control transmitter will also go out automatically. A remote control transmitter does not send an unnecessary electric wave, and a battery life is also prolonged remarkably.
  • The notification distance of an electric wave is about 200m in prospect distance.
  • It can use also as an ordinary three channel receiver.
  • A possibility of being discovered since the installed remote control transmitter does not always send an electric wave becomes closely that there is nothing.
  • Although only C channels can operate by remote control, arbitrary frequency can be manufactured if it is between 398.5Mhz or 399.5Mhzes. In this case, reception of the channel of one either of ABC falls victim.
Directions
  • If the battery lid on the back of a rear is pressed down lightly and is back slid with the thumb, the battery wearing place of a battery is visible. It is careful of polarity to prevent mistakes. The dry cell of U5 is used two If an alkali dry cell is used, it can use for a long time.
  • An attached helical antenna and an attached whip antenna is put in the antenna terminal of the front of a main part. Subsequently, ON of the side and the knob of a small slide switch written to be OFF It moves in the direction of ON. It will be in a state of operation now. As for electric wave efficiency, in about ten percent, the direction of a whip antenna becomes good.
  • It can use also as a receiver ordinarily independently. However, only when a power supply switch is turned ON at first, it is audible for [ no ] about 2 seconds.
  • When using as a remote control receiver, in a standard article, an internal instruction transmitter becomes only C channels [ one ]. The channel of a receiver is surely set as C. If a power supply switch is put in, it will begin and for 2 seconds will send an instruction electric wave to the receiver by the side of a remote control transmitter. The internal-organs receiver by the side of a remote control transmitter is operating a short time at intervals of 2 seconds, in order to save a battery. Therefore, sending an instruction electric wave only at the beginning which put in the power supply switch is continued for 2 seconds. Perception of it of the internal-organs receiver by the side of a remote control transmitter begins to send an electric wave. Although the dispatch electric wave by the side of transmission is henceforth disconnected at intervals of about 4 minutes, the direction of a remote control receiver side will issue instructions of re-connection at an instant, if the electric wave by the side of a remote control transmitter is disconnected. Therefore, unless the power supply switch by the side of a remote control receiver is cut, it can continue receiving continuously. If the power supply switch by the side of a remote control receiver is cut when stopping, dispatch of the electric wave by the side of a remote control transmitter will also go out automatically less than several minutes.
  • A sound is heard by the earphone. It puts in the hole of the side with a power supply switch. A front volume regulation knob (VOL) is turned until it becomes suitable volume. No sound can be heard, if the electric wave is not sent, the channel is not correct or it separates too much with a transmitter. Since a sound powerful at a stretch will go into an ear and will hurt its ear when sound is received if it keeps turned, be careful.
  • Please be cut on the way, when you re-connect, once turn OFF a power supply switch, and turn ON. Re-connection may not be able to be performed, if it cuts and it turns ON at an instant. Since there is also consumption of a battery, please exchange a battery.
  • When recording combining a commercial recorder, it is used by putting an attached recording code in the earphone terminal of a receiver, and the external microphone terminal of a recorder. A receiver, a recorder, and cases are put together and it is made not to install. When used by sticking, in between, on both sides of paper, a cloth piece, etc., please carry out and insulate and install. Unless cases are insulated, it may not be recorded normally.
Specification of KRT-400R
    Receiving part
      The receiver for narrow-band FM
          (double superheterodyne system 1ST:10.7Mhz 2ND:455Khz)
      Received frequency It is a switch change about three channels.
          A channel 398.605Mhz
          B channel 399.455Mhz
          C channel 399.030Mhz
      Receiving sensitivity 0.3microV (-117dbm) S/N 20db
      Audio output 50mW (earphone 32 ohm)
      Consumption current About 9mA (VOL 0)
    Transmitting part
      Narrow-band frequency modulation type transmission
      Oscillation frequency C channels 399.030Mhz
      Instruction signal wave 2.3Khz analog system
      Consumption current 12mA (Stabilization circuit internal organs)
      High frequency output 7mW
      Antenna output impedance 50ohms
      Unnecessary radiation Less than [ -50db ]
      Frequency stability Below +- 5 ppm (-10 degree-C ~ 50 degree C)
    Remote control part
      Initial instruction signal discharge time 2 seconds
      Re-connect time 0.05 seconds
    Power supply voltage 3V (two U5 is used)
    Antenna 50 ohms RCA jack a helical -- or 1/4 wave form memory strait-wire (18cm)
    The connection code for recording is enclosed.
    Operating temperature -5 degrees C ~ 50 degree-C
    Outside size 14mmx73mmx26mm
    Weight 30g (without a battery, antenna )
    Manufacture in the range of 398.5Mhz ~ 399.5Mhz is possible for a custom-made item
      (channel interval 20Khz).
Notes
  • When not receiving, the switch of a battery is surely cut. When you do not use for a long period of time, please take out a battery and place it. Internal parts are damaged when a battery carries out a liquid leak.
  • Since the inside consists of precision parts, please do not drop it, or do not apply power which is twisted strongly. It carries out as carefully as possible, the desorption of an antenna also having both sides for a root portion with a finger, and turning to right and left little by little slowly.
  • Please do not attach a powerful magnet to a main part. It stops functioning at an instant like a magnetic card. It does not return, unless it readjusts.