LDM #447: Angle Of Attack indicator Teledyne Avionics SLZ9680-3

Schematic diagrams: LDM447_A1_A LDM447_A2_A Servo amplifier calculations:...

LDM #446: Distance Bearing Indicator DB-100 Sperry Aviation Part 1: Compass card and pointers

Schematic diagrams: DB-100-A servo_amplifier...