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A crystal is used as the detector. The tube playes the double roll of amplifying the signals before they are “detected” and of again am- plifying them after detection. Such a receiver is very sensitive to weak Some of the reflex sets are very complex. however, and the construc- tion and assembling of such a set is likely to require more patience and skill than the average experi- menter possesses. However, if the directions are closely followed, a good single tube reflex set may be built without undue difficulty. There are numerous reasons why the reflex type receiving sets have recently attained such a great pop- ularity. For the same signal strength fewer tubes are needed. When few- er tubes are used, less space is needml, thus making the circuit ideal for portable sets. Furthermore the operation is simplified by having but one or two tuning controls. transformer. lâ€"Jack and plug. lâ€"â€"C battery (Flash ilght battery.) Depends On Tube To be successful the whole re- ceiver should be built around the particular tube that is to be used. Practically any good amplifier tube is suitable. As in any other re- (Copyright, 192‘, by The Bonnet-Brown Corporation, Chicago) RADIO QUESTIONS AND ANSWERS -Mr. Short-ill will be glad to help you solve your radio problems. Write him, care of The Durham Chronicle. E. R. K. gives a list of his appar- almul. a 20 pm- cent solution of atus used, and “wants to know if it Potassium Hydroxidn. is suitable for a Reinartz tuner?" ., ~“0..“ Ans.â€"Your material is 0.K., but you might add a variable grid leak. Be sure to follow ciosoly the circuit instructions accompanying your UVI99. D. B. S. asks: “What. kind of a solution is used in the Edison Stor- age cell?” signals, and when a suitable tube is used, it will give ample volume for loudspeaker reception on local sta- tions. The main pieces of apparatus needed are given in the following list: Eu nus any 01' Sometimes Dan Cupid becomes prosalc. He gets into a rut and wanders along the way of life, caus- ing merely a host. of commonplace love affairs and marriages, succeed- ed by commonplace children and or- dinary homes. But. he never works that way in the tropics. Down there PAGE 0. n8 Inspll'ca UUI ll. nu---..__ 0: - son moon over an indigo sea lSI something dillerent than a cold, white moon above the drab house- tops of a grimy city. So it. was that Frederick and Fanny Hatton, seeking to write a romance for the screen, chose the tropics for their setting and then called it “South Sea Love.” Williaml oduced the picture which comes to the Veterans’ Star Theatre December 4 and 5. Shirley Mason has the role of the tropical ' ° ty, mingling with scented romance, mule humor and touchms pathos in 2â€"-â€"Dials. 1â€"Crystal detector. 1 â€"Rheostat. 1â€"Socket. lâ€"Audio-frequency amplifying 23 plate variable condensers. Single Tube Reflex Receiver electrolyte (Put On.) By R. M. SHERRILL (Radio Engineer) ' ’ 6% _______._J L_____â€" .â€" FOR SINGLE TUBE REFLEX is As shown in Figure l, the panel layout is very simple. The dials are purposely separated to give greater room behind the panel. The connect' 3 to aerial, ground and hatteri ,. are made from the rear, The panel 'will fit, into a cabinet with inside dimensions of 7x14x7 inches. The crystal detector used may be either fixed, or of the adjustable type. In either case, it should be one that will not be knocked out 'l‘he audio-frequency transformer should have a low primary to sec- ondary ratio ’to minimize distor- tion, and should be preferably one that has been constructed for reflex work. The reflex transformer is constructed according to the special directions given later. ceiver’, the selectivity and sentitiv- ity depend to a great extent upon the. quality‘ of the inductance coils and variable condensers. P111-t 'l'w,0 giving the circuit diap gram and constructional details, will mncludu the description of the Re- iva aptâ€"S1211 next week’s paper. {1. B. inquirus: "ls them any ad- mutagv to [w guinml by using a voltmv'tm' in :1 rvcoiving set?” Ansr-ll' tlw set has boon cali- lmwtml, the calibration would be morn accurate if the filaments are always kept at the same voltage. In addition the life of the tubes would be prolongedby Operating them at the normal voltage or less. "he work of assembling the ap- paratus behind the panel is made easier by screwing a false bottom on to the panel. (See side view In Fig. l). The coils, socket, trans- formers, etc., are mounted on this bottom. and when completed, the whole unit is inserted in the cab- inet. A slot in the rear of the cab- inet will allow the binding posts to project out. of adjustment by a slight jar. The rheostat should be chosen to suit the type of tube to be used. {A single circuit jack is used, and ’in case it is desired to add an A. amplifier, the leads to the input the amplifier may be plugged place of the head phones. IL SOUTHAIPTON FEARS Oil Refinery Promoters Have Been Kissing Since ‘lovombor 20. A number of residents of South-i ampton are harboring a suspicion‘ that they have been the victims of a clever oil swindle worked by the promoters of a soâ€"called American Oil Company who were believed to have commenced the erection of a big refinery in Southampton. A site had been purchased, and a gang of men engaged to clear it up while the directors of the company were busy selling oil shares in town and vicinity. . 'nm nromotors departed from ‘ The ' promoters‘ departed from town on Thursday. November 20, and were to return the following Mon- da , but up till last night, they have no showed you ‘ ---‘I Iv- wu-vv The shareholders, workmen hotels have begun to sumeot they have been victimized by a of oil sharks, and their sum are being strengthened by m: that the officials 9f_the soq _ L_._- 3106 VIEW hour. on. swmnu: of in SPONTANEOUS ‘ COMBUSTION A MCI, NOT FANCY Warwick Township Bern, Recently Burned, Seen to Break into Plume. â€"â€"~0ther Interesting Date Gathered from Experience of Years Gone By On several previous occasions The Chronicle has dealt in its col- umns with the question of spon- 0aneous combustion as it affects farm barns, and while we are fully convinced that the majority of farm fires originate in this manner, it is sometimes hard to convince those most interested that there is any- lthjng in _it_. _ “The fire occurred at about 5.30 p. m. and had its origin in west hay and corn mow of the barn. To the close neighbors, the fire as it ate its way out through the west end of the barn was taken by some to be the moon, by others to be a dim, distant headlight of a car on the road. A moment or two later the whole upper portion of the barn was a mass of fire. Other parties who passed by and called at the Dailey home on a message, saw not the least light, only two minutes before the barn was found bv the Daileys to be on fire. It is with this object in view that we publish this week the follow- ing from The Forest Free Press of last week. While there are not like- ly to be many here acquainted with any of the people mentioned, we give the whole article in the general interest of all who store hay and grain. It says: “At the request of this paper, Mr. (Iowan has given us a copy of his report, which we give here for the benefit of our readers as follows. “On Saturday last, Mr. C. H. Cowan of Toronto, deputy Fire ...arshall of Ontario, was in Forest and went out to the. home of Mr. George Dailey, on the 6th Conces- sion of Warwick, and made a thor- ough investigation into the cause of the fire that occurred on Wednes- day night of last week and destroyed his fine barn, together with the crop and stock. “Mr. Dailey was a believer in‘ spontaneous combustion. but he had not thought his corn could tire his arn “Evidence obtained, the hour of be fire, the location of the tire, and Us sudden outbuist that enveloped ‘he whole upper structure of the ‘1arn leave no room, f01 theif tramp, 1ipe, mt1tch,c_igarette_ or enemy “The W‘alkerton Farmers’ Central Insurance Company has on its files an undisputable case of it 40 years ago. This mow of hay smoked and steamed for days and became fire- hot. While neighbors worked to re- move the produce, the mow took suddenly fire when contents were half removed, and the barn and contents were lost. “Over 1000 barns are destroyed in Ontario each year, entailing a tremendous loss. Many of these are spontaneous combustion. Is it wise in the face of these facts to ignore the warning given and to neglect to take the precaution of curing farm produce thoroughly before entering the barn? “These tires, when once gcmerated in the center of a large mow, can and do carry on for 6, 8, and 10 mqgths before firing um mow. .v.. .vâ€", "Uv “On several occasions, eye wit. lesses have seen fire-hot gas burn ~. ‘3'"!!! suddenly through side, hotp tom, or root of a mow, a moment before ignition through the outer air caused a sudden burst of: flame as was seen in the Dailey tire, mak- in" it. an und‘srn'alfle case of spon- taneous combustion. ” r. Dam-y, mm. and family are convinced, so also are his close mighbors who saw the fire in its initial stages. “Spontaneoura coilnhustion was known of in the reign of George III,_m England. CHRONICLE â€"â€"-â€"â€"â€" â€"__ it 'P‘ort Elsin' a‘nd vghen _he yqtqrqed .V J VI' uuu.” â€"â€"â€" v---_ to his home continued _ imbibing "13 "'97 swam) whiskey with fatal results. McGregor ot Southumton and Street , The hope ChGSt IS With us 5 are. directly traceable to moonshine towels. whiskey during the past two months. Liquid measure: two nint- When dipsomamncs lose their one quart. one quart makes an: uoounu nun! DID 11' The death of IleGregor, a South- ampton butcher, is attributed to moonshine whiskey. He was one of RHINO Rubber Footwear is Guaranteed Better Value Fix” .“ 1 reasoning powers from the effec matured whifih” “u?" WI Grimm: swamp mneoy wnth 11.8 dfldly fuel oil, wepd alcohol or an uni“ that has a lush percentage oralco. hol regurdless of the result. Who'll be the next simple one to shormn hi: lilo? m me 0"” i8 With us yet but it contains fewer embroid..,.;,d dish bowels. Liquid measure: two pints Make Inn nun-o} nnn nun-ml manly“... .._, nanny. Muba- t, 1m Wild. Hunky. RPV. M missinnm‘t from lndi vices m I Mr \ndm' imr talk "I the cum}! her «13 has W chanfl? Take your lov :ummm‘ in town "busi: Okluh‘ iurw 6| (‘Il