Powerfull type minute sound hearing transmitter
KTL-400K


Outline
  • Since the high sensitivity microphone is built in, all the sound that a man's ear hears in the installed place can be gathered.
  • Since an electric wave output is large, it is the battery life of about 8 hours by the dry cell of a U5. Since CR-12600 cannot take out large current, they cannot be used. When making it operate for a long time, a battery adapter (AD-L, AD-L3) is used.
  • It operates to stability until battery voltage falls to 1.2v, since the circuit which raises voltage to an inside and is kept stable is built in.
  • The notification distance of an electric wave is 300m to 500m. In the place where the inside of a building and the house build and are crowded, notification distance becomes short.
  • For receiving, the receiver (KUR-400) of exclusive use and the multi-channel receiver of commercial UHF band is used. When you hear whisper voice etc., please be sure to use an exclusive receiver. And it becomes impossible to hardly catch the noise which the receiver itself takes out with a commercial multi-channel receiver. If Yagi Antenna of three elements is used for a receiver, a receivable distance will be prolonged by 1.5 times.
  • Prolonged automatic recording is made to the recorder of a commercial sound perception starting system.
  • If an electric wave relay machine (RP-300A) is used, it can be heard 500 morem or more in the place which got used.
Directions
  • Two dry cells or battery adapter of a U5 is used. Switch beside a case An electric wave will be sent if it turns ON. It pushes from a top and puts in so that the plus side of the battery which put in so that the minus side of a U5 dry cell might hit a spring there, since there is a space which is made to slide the lid of a case at the point of the thumb, removes, and puts a battery into an inside, and the minus side of one more dry cell put in previously further may be hit. When taking out, as a plus side is written and taken out with the tips of the toes of a finger, it is previously taken out with them.
  • Although a 2mm hole is in a power supply switch side, since sound is taken in from the hole, installation which plugs up the hole is avoided.
  • 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, 1/4 lambda 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 a digital recorder is used, more than a 10 hours part can be recorded continuously, and moreover, it can take in and save and reproduce in a personal computer.
Specification of KTL-400K
    High output minute sound hearing transmitter.
    Moduratin system Narrow-band frequency modulation (maximum frequency deviation +-10Khz).
    Battery voltage 3V (dry cell U5 X2) or external battery adapter (AD-L, AD-L3).
    Consumption current About 50-150mA stepup stabilization circuit is included.
    Continuation use time About 8 hours (alkali dry cell U5 x2) . (for AD-L, three day .AD-L3 is the battery life of 32 hours).
    Dispatch frequency Three kinds
          A channels 398.605Mhz.
          B channels 399.455Mhz.
          C channels 399.030Mhz. One either
    High frequency output 30mW.
    Unnecessary radiation Less than [ -50db ].
    Antenna Screw terminal 1 / 4 lambda form memory type strait wire (18cm), and screw terminal helical antenna (option).
    Outside size 25mmX33mmX18mm.
    Operating temperature -10 degree-C - 50 degree C.
    Weight About 40g.
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.
  • Please do not attach a magnet in a main part. An electric wave does not become weak or it stops coming out.