CO537-4320 — Page 61

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FORM No. 2.

The Telecommunication Ordinance, 1936.

Licence No.

AMATEUR AND PRIVATE EXPERIMENTAL STATION

LICENCE.

of

Licence is hereby granted to

to install and use a wireless telegraph station for transmitting and receiving messages for experimental purposes at

and in addition to work one portable receiving set at any place in the Colony of Hong Kong subject to the conditions hereinafter set forth.

This licence will expire on the 31st day of December.

Postmaster General.

CONDITIONS OF LICENCE.

1. The transmitting apparatus used at the station shall be as described and specified in the diagrams and particulars hereto annexed.

[NOTE:-Diagrams and particulars, in duplicate, must accompany every application for a licence. One set will be retained by the Post- master General, and the other will be annexed to the licence.]

2. The combined height and length of the external aerial, where one is employed, shall not exceed 100 feet. An aerial which crosses above or is liable to fall upon, or be blown on to any overhead power wire, including electric lighting and tramway wires, must be guarded to the reasonable satisfaction of the owner of the power or tramway wire concerned. All aerials erected externally to the building shall be fitted with an earthing switch, and the aerial shall be left earthed when not in use. No aerial shall be erected in such a way as that in falling or being lowered, it shall occupy or traverse a public thorough- fare. The earth connection shall where possible consist of a buried plate or tube in the ground external to the building. Where this arrangement is not possible a soldered connection should be made to the water pipe. On no account shall a gas pipe be used as an earth.

3. (a) The power and types of transmissions shall be as specified in the particulars hereto annexed and messages shall be sent only on the frequencies as specified in the particulars. Type B trans- mission is specifically forbidden.

(b) The use of mains alternating current for anode power supply is prohibited unless rectified and efficiently smoothed.

(c) The frequency of the waves emitted must be as constant and as free from harmonics as the state of technical development permits. (d) When sending any signal the licensee must, during course of transmission, emit his call signal at frequent intervals.

NOTE:-Normally no licence will be granted for power exceeding

ten watts.

4. A record shall be kept of all transmissions, showing the date and times of each transmission and the frequency employed.

5. The exchange of communications between Amateur Stations and between Private Experimental Stations in different countries is forbidden if the Administration of one of the countries concerned has notified objection to such exchange.