Page 4 Advertisement 4

Radio Record, Volume III, Issue 48, 13 June 1930, Page 4

A Transmitting Pioneer TED keenness of the early transmit- ters is exemplified in the case of a London amateur, who; as he was un- able to afford the purchase of appara- tus; set about constructing a transmit- ting set from odds and ends picked up: Even his valves were home-made; as he found where a wholesale drug com- pany dumped its broken test tubes, where the 'electric light company dump- ed its burnt-out bulbs; and where: he could pick up enough gcraps 0f 'tung- sten wire for his flaments: To ex- haugt his home-made valves he scon- structed his own mercury vacuum pump from scrap glass, the necessary mercury being given or lent by another amateur; his headphones were built from bits of wood and wire, and the greatest outlay that this lad of 17 had to face was one shilling for a pair of cutting pliers: It is stated that his station was par- ticularly efficient; and attracted con- siderable attention on account of his long-distance records and superior operating: THE RADIO BOOKSHOP (Te Aro Book Depot, 62 Courtenay Places Wellington.) JUST ARRIVED 8 (Price includes postage) "Practical Radio Congtruction and Re- pairing" (Moyer and Wogtrel) 16/ = "Practical Telegraphy" (Nilson and Hornung) 16/ "Thermionic Vacuum Tube" (Van Der Binl; "Radio Trouble Finder" ("Radio News"= '3/ "Phygical Principleg of Wireless" (Rat- cliffe) 8/9 "Wave Mechanics (Flint) 4/3 "N: Radio Guide and Call Book" ("Radio Record") 2/9 Write "8 : TE ARO BOOK DEPOT WELLINGTON: