Hospital Radio.

Radio Record, Volume II, Issue 10, 21 September 1928, Page 15

Hospital Radio.

HIS worthy idea is by no means unique to Wellington. It has been installed in very many overseas hospitals. One of these is of particular interest; it is the installation at a Sheffield hospital. The receiver consists of a nine-valve mains operated set, with which is connected forty loudspeakers and 400 pairs of phones. Owing to the nature of the buildings, no fewer than ¢ight miles of wire are employed. Six power valves are employed, as well as one radio frequency detector and one audio frequency valve. All are a.c, the filament voltage for ‘which is supplied by two eliminators and the high tension by six. The first of these latter supplies the grid bias. The total power used in operating the set is about 300 volts, which cost the institution id. per hour. The phones in each series are in parallel, each being provided with a jack in order that a patient may listenin at will, The cables supplying these are single wire, the ground being used for the return current. The loudspeakers are likewise connected. In addition a gramophone pick-up and a microphone are installed. The latter is provided for cases of emergency when some announcement is to be sent through the hospital as expeditiously as possible. The cost of the installation has been defrayed by subscription and marks the completion of the wiring of the ninth hospital in this city. oo