2. GAI-Tronics
  3. AM7021

GAI-Tronics AM7021 Installation guide

  • Hello, I've analyzed the Maintenance Manual for the Mine Telephone 821301/302 AM7021. This manual provides detailed information on the telephone's circuit operation, including its permissible design, power specifications using two 12VDC batteries, and unique features like a full wave bridge rectifier and solid state paging system. I'm ready to answer any questions you have about its maintenance or technical aspects.
  • What type of batteries are used?
    What is the phone line impedance?
    What is the paging sensitivity?
    What is the maximum speaker output power?
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