PC-Board Connections
Terminal Connector Finger
AUDIO INPUT 5, 8, 14, 21
AUDIO OUTPUT 4, 7, 13, 20
+9 - 20 v 2
ground 1, 6, 9, 12, 11, 6, 19, 22
Except as indicated, decimal values of capacitance are in microfarads (mF); others are in
picofarads (pF); resistances are in ohms; k = 1,000
This schematic represents one of four sections (channels) on the PC board.
Designed for communications use, this equalizer circuit uses a Mitsubishi M5226P audio
equalizer IC to adjust frequency response. It runs from a 9 to 20 V supply. C6 through C16
are polyester film capacitors of +- 5% tolerance. |