Minute sound hearing micro high power transmitter by remote control
KRT-800T

Outline
  • It is the same size as a world's smallest three channel receiver (KUR-400). It is the epoch-making product which stuffed the voice transmitter, the receiver for remote control, and the control circuit.
  • A remote control receiver (KRT-800R) and a set use.
  • An antenna is put in a remote control transmitter and it puts on the place which wants to carry out and hear a power supply switch from ON. It is immediately receivable if the power supply switch of a remote control receiver is turned ON. If the 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. An unnecessary electric wave is not sent. A battery life is prolonged remarkably.
  • The notification distance of an electric wave is about 200-400m in distance in the flat ground.
  • The internal organs of the semiconductor switch circuit where it interlocks and connection and cutting can do a video transmitter, an external video camera, an external videocassette recorder, etc. are carried out.
  • Its electric wave output is always uniformly stable until battery voltage 3V fall and it is set to 1.3V, since the dry cell contains the efficient stabilization step-up-voltage circuit, although voltage falls with use time. Although a battery life is for about 6 hours if it is made to operate continuously, since it stopped to 1/5 of a state of operation, it will have consumption current of an instruction waiting state about three days of continuation. If it is hearing of about 2 hours per day, it will have about three days. (Alkali dry cell) . A battery adapter is used when using continuously for a long time. AD-RT3 (about 4 times of U5 dry cell), AD-RT (26 times of U5 dry cell).
  • Since an electric wave is not always sent, it is asked to others, or a possibility of being discovered with a discovery vessel etc. becomes closely that there is nothing.
  • Although the number of standard articles is E, arbitrary frequency can be manufactured if it is between 315Mhz or 320Mhzes. (Price 30%, and increase and time-for-delivery one month)
Direction
  • If the both-sides side of the battery lid of the back rear is pressed down so that it may pinch by the thumb and the index finger, and it is slid back, the battery wearing place of a battery is visible. The dry cell of a U5 is used two. If an alkali dry cell is used, it can use for a long time.
  • An attached helical antenna or an attached wire antenna is put in the antenna terminal of the front of a main part. Subsequently, knob of a small slide switch written to be ONOFF of the side It moves in the direction of ON. It will be in a state of operation now. As for electric wave efficiency, a straight wire antenna becomes good about ten percent.
  • A remote control receiver and a set use a remote control transmitter. The internal transmitter of a standard article becomes only F channels [ one ]. If the power supply switch of a remote control receiver is put in, for 2 - 3 seconds will send an instruction electric wave to the internal-organs receiver by the side of a remote control transmitter at first. 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 - 3 seconds. Perception of it of the internal-organs receiver by the side of a remote control transmitter begins to transmit an electric wave, instant. Although the transmitted electric wave by the side of a remote control transmitter 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 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, the transmission by the side of a remote control transmitter will also go out automatically less than several minutes.
  • When carrying out intermittence control of CCD camera, an external videocassette recorder, an external image transmitter, etc., it is used by putting the clip code (an option, \2,500) with a plug of exclusive use in the jack by the side of a power supply switch. Once the line by the side of the power supply currently supplied to apparatus cuts the minus line which connects with the apparatus from the battery, it is connected with the both sides of the cut line. The root of a clip connects with the minus side of a power supply (battery) whose root of a clip supplies a black line to the apparatus at the ground side of the apparatus which connects a red line. It cannot use in a plus side. In this case, the cases of the apparatus controlled with a remote control transmitter must be in the insulated state mutually. The current which can be intermittent is to 300mA in the maximum. Voltage is 20VD.C in the maximum. Exchange cannot be used.
  • When carrying out automatic recording combining a commercial recorder, it is used by putting the recording code of remote control receiver attachment in the earphone terminal of a remote control 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.
  • Since it is a time of the battery of a remote control transmitter being lost when the sound said to the sound which the receiver hears as 'pihii' has been mixed, please exchange a battery. Since it is a time of the battery of a receiver being lost when the touch with which it was filled hears the voice currently heard, please exchange.
Specification of KRT-800T
    Receiving part.
      The receiver for narrow-band FM (double superheterodyne system 1ST:10.7Mhz 2ND:455Khz).
      Received frequency E channels 320.675Mhz.
      Receiving sensitivity 0.3microV (-117dbm) S/N 20db.
      Antenna impedance 50ohms.
      Consumption current About 0.7mA (at the time of standby).
    Transmitting part.
      Narrow-band frequency modulation dispatch.
      Oscillation frequency E channels 320.675hz.
      The maximum frequency deviation + - 10Khz.
      Consumption current 55mA (3V) and 100mA (2V).
      High frequency output 20mW.
      Antenna output impedance 50ohms.
      Sprias Less than [ -50db ].
      Frequency stability Below +-5 ppm (-10 degree-C - 50 degree C)
    Remote control part.
      Consumption current 1mA..
      Transmitting cutting timer About 4 minutes.
      Re-connect time 50mS.
      External apparatus connection capacity 0.3A 20VDC Max (connection with a clip code.) Option.
    Power supply voltage 1.3V-3V (U5 x2).
      They are internal organs about an efficient stabilization step-up-voltage circuit.
    Antenna 50ohms.
      RCA jack Helical Or 1/4 wave wire (18cm) (option)
    Operating temperature -5 degree-C - 50 degree C.
    Outside size 14mmx73mmx26mm.
    Weight 32g (a battery and an antenna are not included).
    Battery adapter AD-RT-ST (U1 dry cell X2) or AD-RT3-ST (U3 dry cell X2) Option.
    Although the number of standard articles is E, arbitrary frequency can be manufactured if it is between 315Mhz to 320Mhzes.
Notes
  • When not receiving, the switch of a battery is surely turned off. 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.