Show THINGS THE RADIO NOVICE 1 WILL NEED tools and materials he should keep on hand advantages of keeping a log book we are going to pause in explaining the theory of radio receivers and get down to practical things tor for today there are many novices building their own sets or making aking fai parts who are lu in doubt as to just what tools and find materials they will need naturally there are tools and tools some cost more than others then there are people and people some people need more tools than others some folks are just naturally handy with tools and others find that tools wont behave and lead leid the user into all sorts of complications the tools and materials following are such as are necessary and which will be useful at all times no prices are given for the buyer will have to look to his pocketbook for guidance in respect tools that will come in handy large medium and small screwdrivers fiat flat three cornered and round file back saw miter saw and box and cross cut saw a small plane a vise ylse a bit and auger pliers a square yardstick or tape rule dividers and hammer bammer preferably a small one mater als that R III be convenient to h hive ive on hani ban I 1 are as follows S san sani and i 4 paper emery paper nire w ire of all gauges round and flat headed screws a supply 4 of brass nuts and washers tine fine and bealing sealing wax bakelite card bo board ird and fiber board tinfoil por celian insulators binding posts and terminals sa s1 sleet beet copper and sheet brass and adhesive tape tape Is possibly the most useful ar tide in the layout for it will be found to have many uses it Is lu short a vei versatile veis atlle piece of material in the electrician electricians s kit hit those of our readers who are build 1 ing a ts may find that it Is good pol ley icy to keep all the odds and ends of wire tape copper etc that they may hae bane it seems that uses for these beoit bits are al alvas va a to be found just wl en ell it Is d se sc that they have been thio n away annay so therefore hoard all small pieces one th ng v ne e want to stress in build ing radio api aratus use care in your work and put a good finish on your sets not ot only does it greatly add to ta tie e appeal ai ax ce of ta tie e set but it also eliminates odd corners and stray ends if of wire that thit catch dust or catch on surrounds ii g objects and will hamper 0 the efficiency of the set either by ti tie e circuit or causing it to be drugged off a pedestal and thrown throan on the floor those who have vacuum tube sets know that usually a fall means some new tubes to if ose radio novices who desire to go skipping blithely through the ether fickli g out a station here and I 1 AK a station there as fancy directs them we no recommend a log book just any sort of book will do or rather any book will do in which one can jot down records ot of the evening evenings s broad casting tl TI e for the log book Is that 4 it prevents ts a lot of unnecessary fuss ing with the dials when a certain sta tion Is desired say gay for instance 4 4 as going nicely but that there BBS vas a certain concert going on in ae nev v york at or or maybe up in boston let us make tre tle problem even harder and say 4 that alere tl ere mere w ere two addresses in one evening both especially good and one of the addresses in new york was as in schedule I 1 to start tio minutes after the one in pittsburgh was as over As soon as ti tie e ne address Is over ta tie e enthusiast starts tarts playing with his dials to catali abc atc ne nev v york sometimes it takes two minutes and sometimes it takes a great deal more time t to catch tire desire 1 signal and more often than not the lecture Is halt half over before h it Is tuned in correctly to assist the enthusiast to tune in quickly on any desired station Is the mission of the log book in this book should be entered the necessary data about all stations that have been picked up here il RI be noted down dow the exact position of the d als where the station was tuned in tl e A 4 aa best and ind other pertinent remarks all 1 these remarks should be entered of A course the first time a new broadcast M ing station Is picked up with the in formation before him the enthusiast needs but a glance at his book to tell birn how I 1 e set his dials the last time he heard beard WEZ the oft heard remark to the effect that was heard last night but cannot be hear hearl tonight should be a thing of the past if a log book is a about out that Is IR providing one s set has range ringe enough for the distance no directions are set down here for making a log book as it Is thought that each one of the radio folk will have his ONU n ideas on the subject ho ilo pace should be left to in scribe even the minutest data about signal reception two way phone plan by oper ith g on to t 10 diffee ent wave lengths oi 01 e 40 meters and the other mateis s a two 0 m way ay radio talk tall N as sf lly ily carr barred ed on beti between veen port ort oie ole and I 1 0 altos lai cal A to 1 MEANING OF frequencies distinction between audio and ra dio dice must be learned early by the beginner A newcomer into radio experiment ing ranks Is often perplexed by the two terms called audio frequency and radio frequency the necessity of making a distinct alon in the frequencies in radio Is im it Is generally kno knoon that vibrations of over 20 a second are inaudible to the human ear the radio transmitters trans depending upon their design emit vibrations always alays running into tens or even hundreds of thou sands and are known as radio frequencies quen cies in the reception of these waves it Is necessary to reduce them to within the range of audibility of our ears therefore an arbitrary division blis been made by radio engineers and designers to d between the two frequencies all frequencies above are alluded to as radio frequencies quen cies cles and all below 10 as audio it must be remembered whenever the question of frequency Is met with nith in the study of radio that radio frequency Is that used in transmission and that it must ultimately by various methods be reduced to audio frequency in order that the telephone receivers commonly used for the reception of signals may function this Is analogous to the transmits tran slon of power over great greit distances by wire it Is generally carried at a high voltage over the greater distance and by means of step do down wil transformers converted to a altage of volts or d nailly bailly used in our household scheme by means of detectors either cr cra stal or tibe ti be which are really rectifiers we convert radio to audio frequencies quen cies cles these thee detectors lop iop off as it u were ere one half of the cycle perm t ting only a flow in one direction the other alternation being almost alual bated rad 0 strange to him the modern modem schoolboy knows wireless from A to Z and can rattle off 0 2 the terms with ith a fluency that staggers the casual dabbler in the ne v art in ome sections of the country however only rumors of the wonders of wireless I 1 ave seeped in and the native isn t quite sure what it Is all about in bleecker a little hamlet outside of ille N N Y a progressive farmer was vas erecting poles tor for nis aei ael lal the other day for the purpose of getting crop reports and weather eather NN forecasts A neighbor happened along and learning that the work vork had something to dot do with wireless asked which pole does that feller sing off of 0 1 RADIO SPARKS in seattle an appeal has been broadcast to motorists for cooperation in preventing traffic accidents doctor masconi recently stat stitt ed to an interviewer tl at he believed radio atmospheric disturbances tur bances came from the land t and not from the sea I 1 radio was first installed in f china by the germans some ten ayears years ago consisting of obsolete f apparatus of a tape that would now be scorned by en an american boy enthusiast some of the youngsters are getting tt e best of the landlord 1 by erecting clothesline antennae where here aerials are forbidden on f the I 1 housetops ouse tops it Is found that tha I 1 even when hen tl e wire Is ining hung ith i drying clothes good results are obtained through radio clothes lines the electric light socket aerial has appeared in ii ranee rance aid Is becoming popi A french en gincer has just turned out some of these de devices Ices which are he ing purchased by the govern ment merit for to the farmers 1 when a steady hum Is heard in tie tl e rev receivers elvers after wiring up a set it may be understood that alere tl ere Is an open circuit somewhere v trace out the wiring T carefully and some little fault jwill will present itself t james II 11 rogers an inventor of maryland claims that he be has received radio messages from distant stations through the ground by simply burding bur ing a I 1 wire he ile says that not only do radio waves travel through the earth but they meet with less resistance tl an when going through the air hundreds of jewelers JeR elers in paris have hane installed radio sets for the 9 purpose of setting tl ti air clocks 4 by Green greenwich mich time heretofore the official time was obtained by telephoning the observatory radio I 1 as taken argentina by storm many broadcasting sta t eions have been opened and a 4 multitude of shops for the sale 1 of the equipment french ma aerial has had the call up to this time but the american jurers are now actively after bus ness 4 A writer says with radio robinson crusoe would have hd qu te a jazzy time na V e hive ahi aa a thou thourl 1 I t tl at radio N is ib one of the things that professor nemo had leagues ua un ler 9 the sea and that it was in I 1 11 I 1 uw en n the llster lous aslani islani v T but ft ti at N verne erne failed to tell about it siaw haftl |