A-4 HUD Video Signals Unit

Technical Information

Catalogue No: C0199
Category: Head-Up Display [HUD]
Object Type: Signal/Data Processor
Object Name: A-4 HUD Video Signals Unit
Part No: Not shown.
Serial No: G.Q.Z. 0098
Manufacturer: Elliott Automation
Division: Airborne Display [ADD]
Platform(s): A-4 Skyhawk 
Year of Manufacture:
Width (mm):
Height (mm):
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Location: Archive Object Store



The success of the A-7 Corsair HUD was followed by a system for the H, M and N variants of the McDonnell Douglas A-4 SkyHawk. About 465 systems were delivered, from about 1970 to 1978 to the U.S and elsewhere. This remains one of the smallest HUD's the company has made with a Display Unit containing little more than the CRT projecting through a 3" optic giving a 20deg TFoV. The system was distributed into the PDU , Video Signals Unit, HVPSU and the Electronics Unit. The VSU contained the driver circuits for the PDU such as the X and Y Deflection drivers for the stroke written symbols and the Video circuits which controlled the CRT spot on and off and the overall luminance. This unit had one of the noisiest fans ever and on test the fan was often ducted away from the test bench!

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