1967-HKRS30-8-58_Part02 — Page 42

1359,

1560.

J551.

1562,

1364

1365.

24

Thyratron and modulator gas-discharge tubes, as follows- (a) Those rated for continuous operation with peak current and peak voltage exceeding 100 amperes and 9,000 volts at a pulse repetition frequency of 200 or more pulses per becond:

(b) Hydrogen thyratrons as follows-

(1) Rated for a peak pulse power of 2 megawatts or

more; or

(i) Of metal-ceramic construction.

Components and parts used as resistive, inductive and capacitive elements in electronic circuits, not elsewhere specified, designed for and/or capable of reliable performance in relation to their electrical and mechanical characteristics and maintaining their design service lifetime while operating-

(a) over the whole range of ambient temperatures from below

-45°C. to above + 100°C; or

(b) at ambient temperatures of 200°C. or bigber.

Materials specially designed and manufactured for use as absorbers of electromagnetic waves having frequencies greater than 2 X 10 cycles per second, and less than 3 X 1012 cycles per second,

Tantalum and niobium electrolytic capacitors, not elsewhere specified, as follows-

(4) All types designed to operate permanently at temperatures

exceeding 85°C..

(b) Sintered electrolytic capacitors, except those having a casing made of epoxy resin or sealed with epoxy resin; (c) Electrolytic capacitors constructed with foils.

GROUP G

SCIENTIFIC INSTRUMENTS AND APPARATUS, SERVOMECHANISMS AND PHOTOGRAPHIC EQUIPMENT.

Electronic equipment and components, not elsewhere specified. as follows-

(a) Assemblies and sub-assemblies constituting one or more functional circuits with a component density greater than 75 parts per cubic inch (4.575 parts per cubic centimetre) and equipments containing such assembly or sub-assembly; (6) Modular insulator panels (including wafera) manunting single or multiple electronic elements and specialized parts therefor,

Electronic computers and related equipment, not elsewhere specified, as follows-

(a) Analogue computers with one or more of the following

characteristics---

(1) Containing a summer with a rated accuracy better than 1 part in 5,000 parts, or a multiplier or arbitrary

1568.

25

adjustable function generator with a rated accuracy better than 1 part in 1,000 parts;

(ii) Containing or capable of incorporating a total of more than 75 summers, integrators, multipliers or function generators;

(ii) Incorporating facilities for automatic insertion or alteration of problem set-up;

(iv) Incorporating any unit designed to function solely as a memory:

(6) Analogue computers designed or modifed for use in air- borne vehicles, missiles or space vehicles and rated for continuous operation at temperatures from below -45°C. to above +55°C; equipment or systems incorporating such computers

(c) Other analogue computers;

(d) Digital computers using drum or disc type primary memory

and possessing-

(i) a total rated directly addressable storage capacity in excess of million bits (the same limit defines both the maximum capacity a single storage equipment may possess and the combined capacity where multiple equipments are used); or

(ii) a capability of storing in excess of 250 bits per linear inch (250 bila per 25.4 mm.) of single track (this limitation Applies to each storage equipment involved);

(e) Other digital computers and digital differential analyzers (incremental computers) designed or modified for use in airborne vehicles, missiles or space vehicles and rated for continuous operation at temperatures from below -45°C. to above +55°C.; and equipment or systems incorporating such computers or analyzers;

Digital differential analyzers (incremental computers), as follows-

(1) Incorporating more than 50 integrators; or

(i) Incorporating integrators with an increment cycle time of less than 1 millisecond (or an iteration rate in excess of 1,000 per second);

(g) Digital coroputers and digital differential analyzers (incre- mental computers) other than those in sub-items (d), (e) and (0):

(A) Specialized parts, components, sub-assemblies and acces-

sories, not elsewhere specified.

Equipment, as follows-

(a) All classes of devices, regardless of other characteristics, identified in sub-items (b), (c), (d), (e), (f), (g) and (D) which are designed to operate below -55°C, or abovo +125°C; (b) Synchros and resolvers (and special instruments rated to have the same characteristics as synchros and resolvers in (i) and (ii), such as Microsyns, Synchro-Tels and Induc- tosyas), possessing any of the following characteristics—

(1) A rated electrical error of 10 minutes or less or of 0.25% or less of maximum output voltage: