1964_IMPORT_AND_EXPORT_(STRATEGIC_COMMODITIES)_REGULATIONS — Page 84

G 84

CAP. 60]

Import and Export (Strategic Commodities) Regulations

[1988 Ed.

[Subsidiary]

(i) Fixed frequency and tunable pulsed magnetrons and cross-field amplifier tubes which are in normal civil use in equipment which may be exported under the terms of these Lists, as follows:

(1) Magnetrons designed to operate at frequencies below 3 GHz with a maximum rated peak output power of 5/MW or less, or between 3 to 12 GHz with the product of the maximum rated peak output power (expressed in kilowatts) and the frequency (expressed in Gigahertz) less than 4 200 and a “frequency tuning time” more than 100 milli-seconds;

Technical Note:

"Frequency tuning time" is the time required to change the operating frequency from a starting frequency, through the maximum frequency, through the minimum frequency, and return to the starting frequency i.e. one complete tuning cycle.

("Frequency tuning time": T

Fp: dither rate.)

1

2F

(2) Crossed-field amplifier tubes designed to operate at frequencies below 4 GHz with a maximum rated average output power of 1.2 kW or less, a bandwidth of 200 MHz or less and a gain of less than 15 dB;

(ii) Fixed frequency continuous wave/magnetrons designed for medical use or for industrial heating or cooking purposes operating at a frequency of 2.375 GHz ± 0.05 GHz or 2.45 GHz +0.05 GHz with a maximum rated output power not exceeding 6 kW or at a frequency lower than I GHz, with a maximum rated output power not exceeding 35 kW;

(c) Tubes which utilise interaction between a beam of clectrons and microwave elements or cavities and in which the electrons travel in a direction parallel to the applied magnetic field (e.g. klystrøns or travelling wave tubes), except.

(i) Continuous wave tubes having all of the following characteristics:

(1) Designed for use in civil ground communication;

civil

(2) An instantaneous bandwidth of half an octave or less, i.e. the highest operating frequency/is not higher than 1.5 times the lowest operating frequency:

(3) The product of the rated output power (expressed in W) and the

maximum operating frequency (expressed in GHz) of no more than 300; (4) An operating frequency no higher than 20 GHz;

(5) No multiple grid electron guns; and

(6) Collectors with no more than two depressed stages;

(ii) Pulsed tubes, having all of the following characteristics:

(1) For civil applications;

(2) An instantaneous bandwidth of half an octave or less, i.e. the highest operating frequency is not higher than 1.5 times the lowest operating frequency;

(3) Collectors with no more than two depressed stages; and

(4) Either of the following:

(a) A peak saturated output power not exceeding 1 kW, an average output power not exceeding 40 W and the operating frequency not exceeding 10 GHz, or

(b) A peak saturated output not exceeding 100 W, an average output power not exceeding 20 W and the operating frequency between 10 and 20 GHz,

(iii) Pulsed tubes, having all of the following characteristics:

(1) For civil applications;

(2) Designed for fixed frequency operation;

(3) Operating frequencies below 3.5 GHz;

(4) A peak output power of 1.6 MW or less; and (5) An operating bandwidth of less than 1 per cent;

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