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Technical Information

Catalogue No: C0331
Category: Head-Up Display [HUD]
Object Type: Power Supply/Conditioner
Object Name: HUD EU LVPSU
Part No: 087478/4-298-01
Serial No: 0629
Manufacturer: Eldec
Division: Unknown
Platform(s): Gulfstream II
Year of Manufacture: Unknown
Dimensions: Width (mm): 41
Height (mm): 180
Depth (mm): 360
Weight (g): 2,780
Location: Rack RAA05 [Main Store]

Eldec Corporation
Lynnwood, Washington
Part No K0656SOCN7506-00098
MFR PN 0A3437 10
Serial No. 0629
MFR Part No. 08748/4-298-01
Contract No.
Do not apply power
F-16 Electronics Unit
Low Volt Power Supply
115V 3ph input
5VDC, ±20VDC output


This LVPSU does not have the Test Connector ‘1J5’at the top. It is a reasonably late model both in Part number and Serial number but it is not currently known why the Test connector is not fitted. However the Part number suggests that this was fitted to a Gulfstream II HUD system.

The Low Voltage Power Supply was a major part of the F-16A/B and C/D Head Up Display systems Electronics Unit and variants of that design. The LVPSU takes in aircraft power at 115V 400Hz and 28VDC and conditions it to the voltages required by the internal electronics typically 5VDC and +/-20VDC. The box locates on the opposite side of the EU coldwall from the Circuit Boards such that heat is conducted into that coldwall and cooling is by means of filtered cold air blown through the wall. There were two suppliers of these Power supplies; the majority was made by Eldec in the USA but a number were second sourced from Roband in the UK. The unit has a large ‘D’ type Cannon connector into the EU and externally the Aircraft connector ‘J2’ and most units also have a Test connector ‘1J5’. A more shallow but wider LVPSU was fitted to the F-16A/B whereas that on the F-16C/D type goes the full height of the EU.

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