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fforlfif A«M Herald •■MblUhad In SantcmhrJ. MW. Th« Ban County Democrat eatabliahed in Pa»—ibar. I*l2. Tbe Two ConaolMatod Do*ember 1. 1919 STM. Kankel, Editor and Owner at the Spaing Held. Colorado PoetoAce aa Baoowd Claaa Matter. Mi omlaiinca change of addreao. be aura to give betk the oM addreea and the new. Ohangea in ads. and new ads. want to be in early— not later than Tuesday, the earlier the better. For Assessor I hereby announce my candi dacy tor nomination on the democratic ticket for county aeeeiaor, subject to the decision of the convention and primary following. H. Y. Robb. C' - ' For Co. Treasurer I take this opportunity of placing my name for the consid eration of the roters of tl.e re publican assembly and direct primary for the office of county treasurer, I shall be truly ap preciative of any support that may be extended me. Earl C. Denney. For Assessor I wish the readers of the Democrat-Herald to be advised that 1 will be a candidate for county assessor on tbs repnblic an ticket, subject to the deci sion of the republican convention and primaries. Any favors will ba appreciated. J, W. Jackson. Locals FARM WANTED: i want to hear from party having farm for sale. Give price description. G. B. Louden, Champaign, Illi nois. c 2. For Sale —Black amber cane seed, 1 cent a pound. Six miles eaat ane one south of Vilas. Chao. Clark, d 2-5 Vilas. Crlr. CJCM|STER.§|(LLS 1m JB wwasa kaowga* Best. Safest. Always Rellabtt wthootsi' ewmniw PUBLIC SALE June 29 At my place 4 mil es west and 3 1-2 north of Utley ville, 4 miles east and 3 of Andrix. 19 Cattle 19 4 cows with calves by side, good ppilkera. 8 3 vr. old heifers, giving milk, i 4 yr. old bull, subject to regis ter. Hogs 1 Polen China brood bow. 7 Gilts, ready to breed. Household Goods J. good diniDK table. 4 dining chairs, j rocking chair. 8 iron bedsteads. USUAL TERMS J. W. BLAND JUST OPENED N. Rich’s Shoe and Harness Repair Shop Between Chcnoweth C.-eam Station and Blacksmith Sh v Half Soling - Ladies’ Shoes 75 cts. Men’s $l.OO U My Work Suits -> Come Again SPRINGFIELD -:- COLORADO LOOK Stroud’s: Tag Sale Starts SAT. JUNE 24th. at 8:30 A. M. This will be the most important selling event ever known in Baca Co. Mr. Stroud has just returned from the Eastern Meiket and our stocks are loaded with the latest and newest merchandise. A rising market makes it necessary to place our Fall Orders at once, and accept early shipment. We must therefore unload our shelves to make room. The next 15 days unloads us. The opportunity is yours. Every item of merchandise is marked with a Red Tag and every tag bespeaks a sav ing to you and a sacrifice of profit for us. We Will Give Awav *lOO k. FREE PRIZES On the opening day, also on every day during this Great Sale the Hand Out Man will give away many dollars worth of merchandise in valuable prizes. You will receive a ticket from the Hand Out Man with every Dollar Purchase that you make. Your ticket number may be lucky any day. See big bills for details. STROUD’S CASH STORE “Where It Pays To Pay Cash” ? Springfield T. J. Carter am) Geo. Cramb were down from Two Buttes. George is just launching out in the store business, and Mr. Car ter is in real estate. 75 qts. of canned fruit and other articles too numerous mention. Feed 150 bu. of snap Corn. Farm Implements l During row binder in good rjnnin« order. Chickens doz c n of good hens,., brooder Baned Rocks. 4 Barrel Rock roosters Locals N. G Jones and Editor Nowels were at Chautauqua Sunday. S, H. Dunbarr Saturday. Mr. Dunbarr has some register ed stock, among them a Purcher on stallion he says is the best of the county. The fair will settle that this fall. Judge Terral returned from Danver last week with his wife and son Ned. At Roy Sliulei-’s Monday, a ! 10-pound baby girl. Miller Bros. Show The Cowboy Girl IN A BIG TENT Springfield-^Coloradq Thursday June 29 No Pictures-A Real Slow, Band Concert 8 P. M. Night Show 8:30. Prices, Children 25 cts., Adults 30 cts. Mrs. Marie Go'den was thrown from a car a short distance <n this side of Denver list week 'and seriously injured. She lost control, the car throwing her out as it jumped a ditch and thsn smashing itself up as it Jammed against a heavy post. Mrs. Golden was taken to the hospital, and the doctor said she would be out in s imething like a week. Mr. Hippy and wife move! to their line new house in southvi est Springfield Saturday. Stock Show From First Page tries lo be made we shall publish ' the information for the (rood of I both the exhi itor and the fair, I and thus to boost for better I stock and a consequent Baca county. (a) I T ilk the sto -k show, pet ready ' for the stock show, and let the management know as soon aa possible of the entries you can and will make. (if) fc/otice the special premiums for the stock show will be published later, and very certain tho.y will be such as to make the stock en tries worth while, Milier Bros “Gowboy Girl’’ show which is to give one per formance in their big tent in Springfield, Thursday. June 2!>th, is not a moving picture show as many people might think from the title of the show, but there are no pictures con nected with the show as it is a| real Western show, put on by' real ’ive actors and actresses and lasts over two hours. From their advertisement in our columns we gather that the show had a band which will play a concert in Jront ,Of the tent before the perfor mance starts at night. Miss Alice Henley, a school teach’r of Brownsville, Kans.. is visiting her brother J. E. Hen ley of West Flats. She is great ly pleased with this country. Prof. Finkle has been employed as superintendent of the Spring field high school, and his accomp lished wife as assistant. Miss Mabel Konkel has been employed to teach the 4th and 5th grades in the Springfield sclio >ls. j Mrs. Geo. Brown took in the en tire program of theC i «uta.ian . RADIO POSITION AND SIZE Of GRID IMPORTANT Determine Vatae of Negative Po tential Necessary to Reduce the Plate Current to Zero. In using a throe ohjetiHnh) .vacuum tube In a radio) kef if*is ‘preftfadde In iiialiilnln tin* grid negative with re spect lo tlio Ilia tiH'iii In order to re quire tin* ininlinuin ntnomit of energj in tin* control of the plato circuit. The relative position* of the grid with respect to the (ihinient and the plute and the size of the ir.esli of the UNO, determine tint value of In. K is the negative potential which must be applied to the grid in order to reduce the plate current to zero. The value of F, which is the positive grid poten tial that will cause the. maximum or saturation current to How in the plute circuit, Is also determined hy the rela tive position of the grid with respect to th«> llhiment and plate. If the grid is of very line inesli, the value of K In small because the electrons in pass ing through the small mesh of the grid on their Journey from the t.la ment to the plate will negatively charge the grid and will to* repelled. .Similarly u small positive charge ap plied to a fine mesh will tend to ac celerate the velocity of the electrons. In case of a very coarse mesh grid, the V'.ectrons can pass through the ap ertures In the grid without coining in so close to the charge on It and a relatively high potential will he re quired on the grid to control the elec tron stream, or In other words, the current flowing In the plate circuit. Referring to Fig. VIII. 0-0, Is the current that will flow in the plate cir cuit when there is no potential ap plied to the grid. Suppose a positive potential as O-I is applied Lo tin* grill. The corresponding plate circuit current will he l-D or IJ-D, more than it was when the grid hud no potential ap plied to It. A negative potential of O-I I r.s now applied to the grid where O-I I is equal in value to O-I, hut opposite In sign. The application of the negative po tential when applied to the grid will cause the plate current to he reduced to a value 11-C or A-C, less than it was when there was no potential ap plied to the grid. So it is seen that a negative potential when applied to the grid does not reduce the plate circuit current as much ns tin* same positive, potential increased tin* plate circuit current. This Irregular conductivity of the tube Is made use of when the tube is used as a detector or rectifier of radio signals. Tin* incoming radio signal is a high frequency alternating current. I.et us npply an alternating difference of po tential whose maximum positive val ue is equal to O-I and whose maximum negative value is equal to O-I I, to the grid of the three-electrode tube whose characteristic curve Is the same us that shown in Fig. VIII. In Fig. IX Is shown tin* alternating difference of potential applied to the grid. Through the first quurtcr of a cycle, from zero at .1 to a maximum nega tive value at K, equal to 0-11, the plate circuit current will vary from 0-0. its value at I* when no grid po tential Is applied to a value at Q equal to ii-r* During the next quarter of a cycle the grid potential chunges from a maximum negative value at K to zero at L. The corresponding values of plate circuit current arc shown hy the portipp of the pjnlp current curve QH: During the next or third quarter of p cycle the applied grid potential Increases from zero nt I, to si maxi mum positive value ul M, equal lo O-I, sind causes the plate circuit to In crease from HI, Its value when the Philo potential is zerq, to I D, an in crease in plate current equal lo R-D. During the remaining fourth quar ter of a cycle as the applied grid po tential varies from a maximum posi tive value uL M U> Mru at N. the plate cJrcpit current varies from a value S to T, Assuming iha( the characteristic curve as shown in Fig. VIII and Fig. IX was with n potential of 40 volts on the plate, then, if the plate current Is fo he reduced to zero by n varia tion of plate voltage—with no poten tial applied to the grid—the plate voltage must lie reduced to zero or a reduction of 40 volts must be made. It i :in i llh-ii. rli.il n * l'ii 1 ■- live volt* in grid will plisli the dame result that '4O •«di- ill In the plate elr« r ubv The ratio of the voltage, oliomr In the plate •nr relit fs nil led "the fiietor of the tube and in denoted hy the letter "K. ’ In the tube just discussed the am plification factor would he -10 dhlded hy live or eight. The amplification factor of*the lubes available for nma tcur use jit .present Is-usually bet weep •I and 10. Tin* iimpliMer.Mon factor Is a funetTidi of the dimensions and rela tive positions of tin- elements In the tube. Ail Incoming radio frequency nl lemming current applied to the grid of a t h roe-elect rode vacuum tube is not only rectified toil the variation in the plate is multiplied hy "U," the amplification factor <*f the lulu*. This iit.Tices me lliree-oloetrode viieiiuni tin* most sensitive detector available. la actual lubes tin* point •*<;" on the eharnetorlstle- curves as shown i i I'iu*. VIII and Fig. IX may not fall on such a point of the curve that symmetrical changes in grid potential will cause a symmetrical change in plate current, starting with zero potential on the grid. It then becomes necessary to apply a constant potential to the grid hy means of a battery in the grid cJr eiilt. railed tin* battery, to main tain the grid nt such a point on the characteristic curve that symmetrica! changes in grid potential will cause the maximum symmetrical current to How in the plate elrniil. Big Ships' Radio. The radio equipment of the ships Paris and Lafayette Is described In a recent Issue of Itadloelectrlclty. on both steamers a five-kilowatt tube trans mitter Inis been installed with a wave range of between IMMM) and me ters. A live-kilowatt motor-generator set Is used to produce tin* plate-high tension for four reetlfylng and four oscillatory tubes, and the low voltage current for the heating of the filament of these tubes. Roth vessels are ; equipped with a radio range-finder, or) “radio goniometer,” which, reduced to plain Kngllsh, means a radio rumpus.?. A distance of 3.400 kilometers has been covered safely by messages sent from tin* transmitter of tin* Paris. Radio for Animal Training. Kx|M*rlinents with the radiophone as an aid in animal training are to he made at the Hippodrome, New York city, by tJeorge Power, trainer of the. elephants, to determine whether It will he possible for his big pets nt Home future dale to execute Ids orders on the stage while the trainer himself Is absent. Professor Bell a Radio Fan. Finding the telephone, his own In vention. a source of annoyance to him, Alexander Cralinm Hell had it re moved ffroin Ids homo. With the ra diophonc there Is a difference. It seems, for Mr. Kell, now seventy-five years old. Is said never to tire of ••lis tening in" and experimenting with the new device. There are few more ar dent enthusiasts, declare Ids friends. RADIO DON’TS Don't expect the circuit to os cillate with equal strength over a great range If you tune the grid circuit with capacity alone. Keep the ratio of I, to C as near constant us possible wldlo tuning. Don't expect a circuit lo os cillate if the natural period of the tickler circuit Is oqual to the natural period of the grid circuit. Don’t place the -tickler or Plato variometer ilglft ' against the grid coil or a change in the plate circuit will detuno the grid circuit. Don’t expect high Impedance tubes to oscillate freely in a eir cuU designed for low Impetluncq tubes. Don’t discard a regenerative receiver until you have fried more than one detector tube. Don’t forget that a soft gas eous tube is the best deflector, and that a hard tube is the best oscillator. Don’t treat inductance coils with shellac or any other var nish or compound that will ab sorb moisture.