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HUD Cathode Ray Tube

Technical Information

Catalogue No: C0429
Category: Head-Up Display [HUD]
Object Type: Module/Sub-Assembly/Component
Object Name: HUD Cathode Ray Tube
Part No: G0821-J2
Serial No: 80714
Manufacturer: Rank Electronic Tubes
Division: Unknown
Platform(s): A-7 Corsair 
Year of Manufacture: 1979
Dimensions:
Width (mm):
100 
Height (mm):
100 
Depth (mm):
194 
Weight (g):
350 
Location: Main Object Store
Inscription(s):

Rank Electronic Tubes
Rank Precision Industries
Sidcup By-Pass, Sidcup, Kent
Cathode Ray Tube
Made in UK
Type G0821-J2
Serial No 80714
Date Code 7940
9001-3144-001

Notes:

This is the Cathode Ray Tube (CRT) from the A-4 PDU. In common with most of the CRT’s it was supplied by Rank. The deflection yoke was probably supplied by Muirhead but this and the Matching Card were separate items in the early PDU.

All HUD CRTs used by Elliotts -BAE Systems have had a deflection coil which magnetically deflects the beam and focussing is electrostatic. The older units designed by Cintel employed magnetic deflection and permanent magnet focussing.

The inside face, on which the phosphor is deposited, is accurately aligned to the mounting flange of the tube to ensure it coincides with the optical module's image plane. For the earliest Head Up Displays the Cathode Ray Tube was supplied to the Company, usually from Brimar (Rank Electronic Tubes), who separately purchased the  Deflection Yoke from a source such as Muirhead and assembled this in-house  within a mu-metal housing. At one time the Company also wound the Deflection Yokes but eventually it was determined that it was much better to have the CRT supplier deliver a fully aligned Tube Unit Asembly with a Matching Card

A-7 HUD: The Tube Unit Assembly (TUA) is a high luminance image source operating in cursive mode. A fine grain P1 phosphor was used

A-4 HUD: The Tube Unit Assembly (TUA) is a high luminance image source operating in cursive mode. A fine grain P1 phosphor was used

 

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