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Cathode Ray Tube (CRT) Anode Interconnections
The CRT anode lead assemblies shown in this catalog were developed by Reynolds to reliably interconnect the anode of “heads up” and “heads down” CRT display systems typically found in the avionics suite of high performance military and commercial aircraft.
These display systems usually fit into an area of the cockpit already crowded with other avionics. The CRT anode lead assemblies must be as small as possible, and if the power supply or the CRT need to be removed, they must be easily and reliably disconnected from the power supply.
Reynolds has addressed these requirements in the design of the Max series anode lead assemblies. For example, the Advanced series interface seal of the receptacle can be replaced if the seal is damaged without the costly removal of the receptacle from a potted, high-voltage power supply. The seal and the Advanced series interface sealing system is used. Right angle attachments present a lower profile, save space and contribute to optimum cable routing and easier mating and un-mating. Both the receptacle and the plug are available in right angle configurations. The FEP Ready-to-Bond cable used on Reynolds anode lead assemblies is small, abrasion and cut-resistant and flexible.
Traditionally, the anode lead has been installed on the CRT by the CRT manufacturer and shipped to the display system manufacturer as a part of the CRT. In many cases the anode lead was electrically attached to the tube and sealed by potting the lead to the tube to assure operation at 70,000 feet altitude. This method of attachment, was effective but created a higher than desired profile.
The CRT industry has tried to use J1-21 and J1-22 anode connections as industry standards. These connections work well at sea level but are unreliable when operated at reduced atmospheric pressure. In creating the Max series, Reynolds improved these connections by changing the material to a special silicone rubber that is nearly indestructible. This provides an excellent electrical and environmental bond to the CRT.
The Max series anode lead assemblies are fabricated by molding the Reynolds Ready-to-Bond cable directly to both the connector plug and the anode connection. This enables the tube manufacturer or the display systems integrator to purchase a complete cable assembly which can be easily bonded to the CRT. If the CRT fails, the lead can be replaced without costly de-potting and re-potting of the CRT.
General Specifications
Receptacle Assemblies
Male Contact
Design: Spherical radius
Material: Brass, Gold Plated
Size: 16 (ø.062)
Body
Material: Diallyl phthalate
Mating Thread: .500-20 UNF
Interface Seal
Material: Silicone rubber
Seal Retainer
Material: Thermoplastic
O-Rings
Material: Silicone rubber
Jam Nut (except P/N 178-8994)
Material: Diallyl phthalate
Electrical (mated condition)
Rated Voltage: 30 KVDC at 70,000 feet
Test Voltage: 120% of rated voltage @ 70,000 feet simulated altitude
Temperature Range
Operating: -55 to +125° C
Storage: -65 to +125° C
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Plug Cable Assembly
Female contact
Design: Split finger; closed entry
Material: BeCu, gold plated
Size: 16
Insulator
Material: Thermoplastic
Encapsulation
Material: Silicone rubber
Coupling Nut
Material: Thermoplastic Mating Thread: .500-20 UNF
Retainer Ring
Material: Stainless steel
Cable
Material Core: .100 diameter FEP
Size: 20 AWG |
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