The three channel discovery receiver for tracking
KRS-300


Outline
  • It is micro and the three channel high sensitivity discovery receiver device which can decide the position of the transmitter for tracking and various voice transmitters, and the transmitter for a telephone, and can be discovered with regards to the kind of transmitter that there is nothing. However, the intermittent transmitter of our company cannot be noticed.
  • Since the internal organs of the three channel receiver unit (BD-URZ) of high sensitivity and the special amplifier are carried out, it can discover easily even from the more distant place from a receivable distance.
  • Furthermore, since the internal organs of the special amplifier of development of our company to compress are carried out, it can check by change of the frequency (tone) of sound continuously immediately to a transmitter side from the place which left the intensity of an electric wave. The aim of a direction and distance is given by change of the tone of an earphone. If a tone moves in the direction which becomes high (from Buho to Phii), it will follow and stick to a transmitter.
  • It can use also as a three channel hearing receiver without the speaker of KUR-400 by switch change.
  • It is the micro and lightweight discovery device of the size which hides in a palm. Directions only put in simplicity and a power supply switch very much, and operate immediately. Put [ the switch ], there will be a life of a battery about 2 days.
  • A common discovery device is inconvenient to operation (you have to walk and turn ,and an attenuator must be changed, seeing meter) or a discovery device at one apparatus with Yagi Antenna and it is the transmitter of exclusive use moreover,it is not conspicuous at all.
  • Although the discovery device of our company can discover every transmitter, can use the same antenna as a receiver, does not become obstructive at all having and walking and is searched.
  • Although an ordinary antenna is enough, if directive Yagi Antenna is used, it can discover from the place which left the 200m transmitter about 300m. And we recommend you to be used together in order to be easy to attach the aim of a direction. Since this antenna is sectional, it is convenient to carry
Directions
  • An attached helical antenna or directive Yagi Antenna is put in the antenna terminal of the front of a main part. Subsequently, the side Knob of a small slide switch written to be ON and OFF It moves in the direction of ON. An earphone is put in the hole by the side of it, and is used for it. It will be in a state receivable now. Subsequently, a few (1 or 2) front volume regulation knobs (VOL) are turned. Since a sound powerful at a stretch will go into an ear and will hurt its ear when it becomes within the circle [ receivable ] if it keeps turned, be careful.
  • The selection switch of a discovery device or a receiver is set up first.
  • It changes to a high sound called "Phii" as it will become a low sound called "Buu" as a transmitter is approached and it will approach further from the sound "Butsu Butsu", at first, if it is within the circle [ of a transmitter / receivable ], when using as a discovery device. At first, it has a discovery device before the body so that an antenna may become perpendicular and turns around the body slowly, and a point is carried out once, and it feels and comes out, . A tone or the direction which was able to be heard most highly becomes in the direction with a transmitter. If it moves to that one, since a dial tone will change to a high sound Phii" , it moves to the direction which becomes the highest sound. Although become high frequently, or it becomes low or being repeated, it moves to the one higher than the time's of becoming high. An antenna will be removed if it stops changing while the tone has been high (about 1000 cycles). Moreover, since it changes to a low sound, by the same method, it can follow and arrive immediately at a transmitter side.
  • The strength of an electric wave repeats strength on the character of an electric wave for 1/4 wave (in the case [ 400 ] of Mhz about 17cm) of every length. Moreover, in the place where the building built and was crowded, it may be hard to give the aim of a direction while searching, since an electric wave reflects with the wall of a building or a reflective wave and a going-straight wave overlap and deny also in Yagi Antenna. If a building is passed, a direction will change a little. Therefore, although puzzled at first just for a moment, it gets used immediately. A transmitter can be discovered now, putting into a breast pocket, when getting used.
  • 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.
  • The change switch of a channel is in the side by the side of a power supply switch and opposite. It unites with the channel of a transmitter in the place of the sign of A, B, and C.
  • As for exchange of a battery, if it is back slid as the both-sides end of the battery lid on the back of a rear is pinched by the thumb and the index finger, a battery appears. It is careful of polarity to prevent mistakes. The battery of U5 is used two If an alkali dry cell is used, it can use for a long time.
Specification of KRS-300
        The three channel discovery receiver for tracking
        Receiver (double super heterodyne system 1st:10.7Mhz 2nd:455Khz)
        Received frequency for narrow-band FM It is a switch change Three channels.
            A channels 398.605Mhz B channels 399.455Mhz C channels 399.030Mhz
        Discovery sensitivity 0.15microV (-123dbm)
        Receiving sensitivity 0.3microV (-117dbm) S/N 20db
        Special amplifier [ ] -- linear - range 80db Compression amplification (1stIF)
            It is a conversion voice output to 10 ~ 1kHz rectangle sound.
        Sound out put 50mW Max (earphone)
        Power supply voltage 1.1V ~ 3V Stable step up circuit internal organs (two U5 is used)
        Consumption current About 20mA (VOL 0)
        Continues useing time About 30 hours (alkali dry cell)
        Antenna 50 ohms RCA jack A helical or 1/4 wave form memory strait-wire (17cm)
                  -- or Yagi antenna(NY-399C) (option)
        The connection code for recording
        Operating temperature -5 degrees C ~ 50 degree-C
        Outside size 73mm long, 26mm wide, height 14mm
              (without projection thing and an antenna)
        Weight 38g (a battery and an antenna are not included)
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 the magnet of the transmitter for tracking to a main part by any means. It damages at an instant. Ferrite core - currently used for the resonance circuit is magnetized, and it stops functioning. You have to come to readjust.