Angle of Attack Indicator

Disassembled the A-4 Angle of Attack indicator. It appears to be the real gauge from an A-4. It was quite complex.

Keeping

• Main dial, scale is 0 to 30 (units, not degrees, per Navy info)
• “OFF” indicator. The Off indicator measures about 60 ohms. This can be indicated by apply 5V through a 220 Ohm Resistor. Draws 14 mA
• Red light and buzzer, perhaps for stall indication. This can be indicated by apply 5V directly, draws 0.7 amps.

http://www.navyair.com/Angle%20of%20Attack%20Indicator.htm