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Radio Record, Volume II, Issue 24, 28 December 1928, Page 27

¥ your loud-speaker is several years old and does not seem to be so good as formerly, it is possible that if overhauled by the makers or a firm specialising in such work it would receive a new lease of life. F a fault suddenly develops in your receiver, the following check should be made in the order given :-Filament battery, "B" battery, valves, loudspeaker, aerial, earth, battery connections. If you are not experienced enough to effect repairs yourself, take your receiver to a reliable firm to be repaired, otherwise you may cause some ‘damage.