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Wireless World Golden Jubilee review of 1939

Wireless World April, 1961.
    
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Ever-Increasing interest in sound reproduction was further stimulated by BBC experimental transmissions of high quality on 45Hz; this was Britain's first taste of VHF broadcasting, though FM had already started in America.

'The Western Electric radio altimeter' for aircraft, an FM device working on frequency differences between the emitted wave and reflections received from the ground, was described.

In television, the public had not taken kindly to the small 'peephole' sets introduced last year and there was a reversion to larger tubes, the 12-in size being most favoured. Ignition interference was being discussed and voluntary suppression was suggested.

Some new introductions: the cathode follower; 'all-glass' valves with short, well spaced internal leads; forced air cooling for high-power transmitting valves; short-wave therapy.

With the threat of imminent war, Wireless World had, with official approval and collaboration, instituted early in the year a 'National Wireless Register' through which readers were able, without any liability, to have a record of their technical qualifications made available to the appropriate authorities. The Register was later to prove a valuable source of technical man-power for war-time radar as well as for communications.

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