(kicad_sch
  (version 20231120)
  (generator "eeschema")
  (generator_version "8.0")
  (uuid "cams1-input-psu-0005")
  (paper "A3")
  (title_block
    (title "CAMS-1 — Balanced Input + Power Supply")
    (date "2026-08-28")
    (rev "A")
    (comment 1 "INA134/THAT1200 -> master pot -> LINE_OUT | Toroid -> bridge -> +/-25V & 7815/7915 +/-15V")
    (comment 2 "VERIFY transformer primary and 7915 pinout before wiring")
  )

  (lib_symbols
    (symbol "Device:R"
      (property "Reference" "R" (at 2.032 0 90) (effects (font (size 1.27 1.27))))
      (property "Value" "R" (at 0 0 90) (effects (font (size 1.27 1.27))))
      (symbol "R_0_1" (rectangle (start -1.016 -2.54) (end 1.016 2.54) (stroke (width 0.254) (type default)) (fill (type none))))
      (symbol "R_1_1"
        (pin passive line (at 0 3.81 270) (length 1.27) (name "~" (effects (font (size 1.27 1.27)))) (number "1" (effects (font (size 1.27 1.27)))))
        (pin passive line (at 0 -3.81 90) (length 1.27) (name "~" (effects (font (size 1.27 1.27)))) (number "2" (effects (font (size 1.27 1.27))))))
    )
    (symbol "Device:C"
      (property "Reference" "C" (at 0.635 2.54 0) (effects (font (size 1.27 1.27))))
      (property "Value" "C" (at 0.635 -2.54 0) (effects (font (size 1.27 1.27))))
      (symbol "C_0_1"
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        (polyline (pts (xy -2.032 0.762) (xy 2.032 0.762)) (stroke (width 0.508) (type default)) (fill (type none))))
      (symbol "C_1_1"
        (pin passive line (at 0 3.81 270) (length 2.794) (name "~" (effects (font (size 1.27 1.27)))) (number "1" (effects (font (size 1.27 1.27)))))
        (pin passive line (at 0 -3.81 90) (length 2.794) (name "~" (effects (font (size 1.27 1.27)))) (number "2" (effects (font (size 1.27 1.27))))))
    )
    (symbol "Amplifier_Operational:INA134"
      (property "Reference" "U" (at 0 5.08 0) (effects (font (size 1.27 1.27))))
      (property "Value" "INA134" (at 0 -5.08 0) (effects (font (size 1.27 1.27))))
      (symbol "INA134_0_1"
        (rectangle (start -7.62 7.62) (end 7.62 -7.62) (stroke (width 0.254) (type default)) (fill (type background))))
      (symbol "INA134_1_1"
        (pin input line (at -10.16 5.08 0) (length 2.54) (name "+IN" (effects (font (size 1.27 1.27)))) (number "2" (effects (font (size 1.27 1.27)))))
        (pin input line (at -10.16 -5.08 0) (length 2.54) (name "-IN" (effects (font (size 1.27 1.27)))) (number "3" (effects (font (size 1.27 1.27)))))
        (pin output line (at 10.16 0 180) (length 2.54) (name "OUT" (effects (font (size 1.27 1.27)))) (number "6" (effects (font (size 1.27 1.27)))))
        (pin power_in line (at 0 10.16 270) (length 2.54) (name "V+" (effects (font (size 1.27 1.27)))) (number "7" (effects (font (size 1.27 1.27)))))
        (pin power_in line (at 0 -10.16 90) (length 2.54) (name "V-" (effects (font (size 1.27 1.27)))) (number "4" (effects (font (size 1.27 1.27)))))
        (pin passive line (at 10.16 -5.08 180) (length 2.54) (name "REF" (effects (font (size 1.27 1.27)))) (number "5" (effects (font (size 1.27 1.27))))))
    )
    (symbol "power:GND" (power)
      (property "Reference" "#PWR" (at 0 -6.35 0) (effects (font (size 1.27 1.27)) hide))
      (property "Value" "GND" (at 0 -3.81 0) (effects (font (size 1.27 1.27))))
      (symbol "GND_0_1" (polyline (pts (xy 0 0) (xy 0 -1.27) (xy 1.27 -1.27) (xy 0 -2.54) (xy -1.27 -1.27) (xy 0 -1.27)) (stroke (width 0) (type default)) (fill (type none))))
      (symbol "GND_1_1" (pin power_in line (at 0 0 270) (length 0) hide (name "~" (effects (font (size 1.27 1.27)))) (number "1" (effects (font (size 1.27 1.27))))))
    )
  )

  (hierarchical_label "LINE_OUT" (shape output) (at 180.0 50.8 0)
    (effects (font (size 1.27 1.27)) (justify left)) (uuid "hl_lo"))
  (hierarchical_label "+25V" (shape output) (at 180.0 100.0 0)
    (effects (font (size 1.27 1.27)) (justify left)) (uuid "hl_p25"))
  (hierarchical_label "-25V" (shape output) (at 180.0 120.0 0)
    (effects (font (size 1.27 1.27)) (justify left)) (uuid "hl_n25"))
  (hierarchical_label "+15V" (shape output) (at 180.0 140.0 0)
    (effects (font (size 1.27 1.27)) (justify left)) (uuid "hl_p15"))
  (hierarchical_label "-15V" (shape output) (at 180.0 155.0 0)
    (effects (font (size 1.27 1.27)) (justify left)) (uuid "hl_n15"))
  (hierarchical_label "GND" (shape output) (at 100.0 170.0 270)
    (effects (font (size 1.27 1.27)) (justify left)) (uuid "hl_g"))

  (text "INPUT: Neutrik NCJ6FI-S -> INA134 (U5) -> Rmaster 10k log -> LINE_OUT to XO"
    (exclude_from_sim no) (at 20.32 25.4 0)
    (effects (font (size 1.27 1.27)) (justify left bottom)) (uuid "t1"))
  (text "PSU: IEC FN9222 - F1 T2A - SW1 - T1 2x22V 200VA - BR1 - Craw 10000uF x2/rail - +/-25V to amps"
    (exclude_from_sim no) (at 20.32 80.0 0)
    (effects (font (size 1.27 1.27)) (justify left bottom)) (uuid "t2"))
  (text "From raw DC: U6 LM7815 + U7 LM7915 -> +/-15V for XO/INA134 | Cout 100uF+100nF each"
    (exclude_from_sim no) (at 20.32 82.54 0)
    (effects (font (size 1.27 1.27)) (justify left bottom)) (uuid "t3"))

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    (uuid "u5") (property "Reference" "U5" (at 70 37.0 0) (effects (font (size 1.27 1.27))))
    (property "Value" "INA134PA" (at 70 64.0 0) (effects (font (size 1.27 1.27))))
    (pin "2" (uuid "u5a")) (pin "3" (uuid "u5b")) (pin "6" (uuid "u5c"))
    (pin "7" (uuid "u5d")) (pin "4" (uuid "u5e")) (pin "5" (uuid "u5f")))
  (symbol (lib_id "Device:R") (at 120.0 50.8 90) (unit 1)
    (uuid "rm") (property "Reference" "Rmaster" (at 120 45.72 90) (effects (font (size 1.27 1.27))))
    (property "Value" "10k log" (at 120 55.88 90) (effects (font (size 1.27 1.27))))
    (pin "1" (uuid "rma")) (pin "2" (uuid "rmb")))
  (symbol (lib_id "power:GND") (at 70.0 70.0 0) (unit 1)
    (uuid "gref") (property "Reference" "#PWRI1" (at 70 70 0) (effects (font (size 1.27 1.27)) hide))
    (property "Value" "GND" (at 70 73.81 0) (effects (font (size 1.27 1.27))))
    (pin "1" (uuid "grefp")))

  (label "XLR+" (at 40.0 45.0 0) (effects (font (size 1.27 1.27)) (justify right bottom)) (uuid "lx+"))
  (label "XLR-" (at 40.0 55.0 0) (effects (font (size 1.27 1.27)) (justify right bottom)) (uuid "lx-"))
  (label "BAL_OUT" (at 90.0 49.53 0) (effects (font (size 1.27 1.27)) (justify left bottom)) (uuid "lbo"))

  (text "Chassis: bond IEC earth to amp plate ONLY once. Signal star-GND at bulk capacitor center tap."
    (exclude_from_sim no) (at 20.32 175.0 0)
    (effects (font (size 1.27 1.27)) (justify left bottom)) (uuid "tsafe"))
  (text "Place holders T1 BR1 CrawP/N U6 U7 F1 SW1 IEC1 on chassis plate — not all on small PCB"
    (exclude_from_sim no) (at 20.32 177.54 0)
    (effects (font (size 1.27 1.27)) (justify left bottom)) (uuid "tmech"))

  (sheet_instances (path "/" (page "IN_PSU")))
)