AUDIO EQUALIZER
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 (uF); 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. (QST,
5/90, p. 22-24)
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