1965-HKRS30-8-55_Part06 — Page 23

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travelling wave tubes and magnetrons; except fixed frequency pulsed maguetrons designed to operate at a frequency of 9375 kM¢/5 ± 0.03 kMc/s with a maximum peak output power not greater than 25 KW; (c) Indirectly heated valves of a kind that can be passed through a circular

hule of 72 mm. in diameter;

(d) Valves designed to withstand an acceleration of short duration (shock)

greater than 1,000 g:

(c) Valves constructed with beryllium oxide ceramic;

() Valves designed for operation in ambient temperatures exceeding 100°C.; (z) Vacuum tubes specially designed for use as pulse modulators for radar or for similar applications, having a peak anode voltage rating of 100 kV or more; or rated for a peak pulse power of 2 MW or more.

29. Thyration 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 second;

(5) Hydrogen thyratrons of any rating, except types 4 C 35, 3 C 45 and direct replacements and equivalent types which vary only as regards healer voltage and/or basing.

Nove-A thymtron is any hot cathode gas-filled tube containing 3 or more electrodes in which soode current flow is initiated by a control electrode.

30. 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 coechanical charac- teristics 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) Ar ambient temperatures of 200°C, or higher,

31. Materials designed and manufactured for use as absorbers of electromagnetic waves having frequencies greater than 2 x 10 c/s and less than 3 x 1012 cfs.

32. Tantalum and olobium electrolytic capacitors, not elsewhere specified, as

follows-

(a) All types designed to operate permanently at temperatures exceeding

(b) Sintered electrolytic capacitors;

(c) Electrolytic capacitors constructed with foils.

33. Electronic computers and related equipment, not elsewhere specified, (except business-type machines, accounting machines and statistical calculating machines).

34. Equipment specially designed to produce electronic assemblies, as follows- (a) By depositing or printag on insulating panels (including plates and wafers), or otherwise forming, in situ, component parts other than basic wiring: or

(b) By automatically inserting and/or soldering components on insulating panels (including plates and wafers), to which wiring is applied by print- ing or other means,

(c) By automatically or semi-automatically assembling, wiring and/or pack- aging mounted modular insulated panels (including wafers) referred to in (4) and (b) above.

35. All electronic contral equipment.

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36. Magnetometers, and specialized parts therefor, as follows-

(a) Fluxgate;

(6) Electron beam senaingi

(c) Paramagnetic.

(d) Nucleonic;

(e) Hall effect, except magnetometer which use general purpose Hali-Beld probes to measure magnetic fields greater than 1 Oersted (Oc) using control current between 100 and 400 mA.

37. Recording and/or reproducing equipment, not elsewhere specified, as

follows-

(a) Those using magnetic techniques (except those specifically designed for

voice or music);

(b) Those using electrothermal and/or electrostatic recording techniques employing électron beams, operating in a vacuum and/or employing other means to provide a charge pattem directly on the recording surface; and specialized equipment for the read-out of material so recorded:

(c) Specialized parts, components and recording media for use with equip-

ment described in (a) and (b) above.

38. Centrifugal testing apparatus or equipment possessing any of the following

characteristics—

(a) Driven by a motor or motors having a total rated horsepower greater

than 400 h.p.:

(6) Capable of carrying a payload of 250 lbs, or more;

(el Capable of sxerting a centrifugal acceleration of B or more "g" on a

payload of 200 lbs. or moreĆ,

39. Ion microscopes having a resolving power better than 10 Angström units. 40. Oscilloscopes and specialized parts therefor, as follows-

(a) Cathode ray oscilloscopes possessing any of the following characteristics- (1) An amplifer bandwidth greater than 20 Mc/s for DC-coupled serpes or greater than 30 Mels for AC-coupled scopes (defined as the band of frequencies over which the deflection on the cathode ray tube does not fall below 70.7% of that at maximum point measured with a constant input voltage to the amplifier);

() A time base shorter than 40 nanoseconds per centimetre, ¡ncluding calibrated magnified sweep factor:

(ü) Employing accelerating potentials in excess of 5,000 volts; (iv) Containing or designed for the use of a cathode ray tube with three or more electron guns;

(y) Containing or designed for the use of-

(1) Cathode ray memory tubes;

(2) Cathode ray tubes with travelling wave or distributed de- flection structure or incorporating other techniques to minimize mismatch of fast phenomena signals to the defection structure; (vi) Ruggedized to meet a military specification:

(vii) Rated for operation over an ambient temperature range of from below -25°C. to above +55°C+

(viii) Incorporating a calibrated variable sweep delay with an incre mental accuracy (measured at the 90% delay point) of better than 3%:

(ix) A rise time of less than 12 nanoseconds;