Ogden Standard-Examiner | 1922-03-29 | Page 3 | Duncan Gives Tips on Code

DUNCAN GIVES TIPS eMU n It. L. DI NCAN Director Radio Institute of moriaa The best way for radio enthusiasts to get ahead is to get together unec the AUC of the wireless codo lis learned. I advise the fan to join I i others Prog- IpjjhBwPB'JA WJ If v i annot 3F xiied arrinRe. WQjfs"1 & ' ' " F !.!-. K I help you wht " -rfi ' 1 1 Hflk Ak. a ma- I J Bl n HOOK-UP R. Ii. DUNCAN But clubbing together to-gether Is the best Idea. If five or Six amateurs get together togeth-er I suggest their rigging up t hi cir- Pi Pi r 1 T? f f . UvlliL'tS' J I 1 I --jL cuit diagrammed here. The essentials essen-tials are: A battery of primarey cells fB) from A to 6 volts: telegraph key (K-. i buzzer (Z : a two microfarad con- denser (C: any number of head-1 I phones ( P. ( Along the dotted lines is another ending Key (Kl) In shunt to the; main key (K). Any number of phones and keys may be employed i with this hook-up. But only one k..y mat be used at a time. Members of the group could take ' turns sending while the others listen , In and copv his message. I U I si i . '-1 ( . I . An adjustable rheostat tRi of 400 Qhma resistance should be Bhunteil across the telephone clrculi S" th'it the strength of the signals may bo reduced or Increased as desired. Ordinary Or-dinary 75 or 80 ohm single head receivers re-ceivers should be used The total cost of the materia J necessary for six students would not! i be river $30. This would include six t head receivers and keys j The adjustable rheostat may Ve dispensed with If you want to keepj the expense down. The condenser i may be one used In land line telegraph tele-graph or telephone work. It function func-tion Is to give a reproduction of the note of the buzzer vibrator through ohargs and discharge. oo