Mystery Panel

    I found this in a surplus shop, and it was just too cool to pass up. Judging by the labels, it may be part of some sort of airborne bombing computer. On the upper part of the front side, it's marked Unit IA3. On the back side, it's marked 12115 ASSY 7513-3026-1. The front side is covered with decimal thumbwheel switches, numeric LED readouts and a large rotary switch. Judging by the flat pack ICs used on the LED displays, I'd guess it to be mid to late '70s technology, and the manufacturing dates on some of the chips are indeed from 1978 and 1979. The labels on the front side are:

LED Displays

• TARGET FROM AIRCRAFT
• BEARING DEGREES MAGNETIC
• DISTANCE METERS
• MEMORY CONTENTS

FLIGHT COURSE Switches

• ABORT CRITERIA METERS
• IP TO TARGET KILOMETERS
• IP TO TARGET BEARING DEGREES MAGNETIC

SCAN Switches

• EL DEGREES
• AZ CENTER DEGREES TRUE
• AZ WIDTH DEGREES

IMPACT ERROR Switches

• N-S KILOMETERS
• E-W KILOMETERS
• ELEVATIION FEET

METEORLOGICAL Switches

• WIND VELOCITY KNOTS
• WIND DIRECTION DEGREES TRUE
• WET BULB TEMP F
• DRY BULB TEMP F
• BAROMETRIC PRESS MILLIBARS

METER SELECT Rotary Switch

• OFF
• 115V0C
• 115V0B
• 115V0A
• +28V
• +15
• -15
• 1150V COMP
• +5V COMM
• +5V COORD
• +5V CMPTR
• +5V RDR
• +5V MSN
• AGC
• FREQ MON
• MAG CUR
• TUNE V BEACON
• TUNE V SKIN

Indicators

• DATA ERROR
• MALFUNCTION

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