PAGK FOUR GRINTS Plan for Laying Out Panel Front PAS«« RAH.T I ltll> XV, NOVEMBER T, I1KN. (AtlKIKII I G Closing-Ont Sale Finding Correct Poaition Hr Various Holes Usually (Edited by a Douglas Wardrop. Editor of Radio Morrhandlalnr 1 Diagram Showing Directions Which Must Be Followed for Construction of th* Two-Stags Crystal Amplifier. Hard Talk. Uw....... . l-aying out the panel often proves to be the hardest task in building * set. Finding the correct position for the condenser, variometer and switch point boles 1* usually the hardest of the lot. Unless a template Is Inclosed In the boxes in which the instruments nre sold the constructor must find some way to mark the panel. Many a condenser Is mounted with only two end sometimes one screw bolding It. There are many methods of rindjng the correct markings for the mounting holes of the condensers. A few of these will be listed herein. A piece of stiff cardboard may be forced over the shaft and holes carefully made where the mounting screw holes meet the cardboard. This form* an accurate template. If the condenser has prgtrudlng screw mountings, then these may be given a coat of white paint around the inside edge and the shaft pushed through the shaft hole In the panel. The mountings are then pressed to the«panel gently but firmly and the condenser pulled away quickly. This will’ leave three holes as guides for the drilling. It the screw mountings are flush with the end plate of the condenser then the screws can be screwed partly Into the end plate and ■ cat of white paint applied to the top* around the edge. These three meth­ ods of making templates can be ap­ plied to variometers, coupler*. rheo­ stats, potentiometers or any appara­ tus that must be mounted on a panel. But for mounting switch points a special method must be used. A strip of 1-16 Inch sheet brass Is pro­ cured at least one Inch longer than the radius of the switch blade. This piece tot brass should be prepared ac- cording to the diagram, The bottom hole Is plac'd inside the hole that lias been drilled for the switch lever. This hole, both In the template and In the panel, should not be large. The panel hole can be redrilled after the hides have been mnrked for the points. The two holes st the top of the template nre Inld out with the old of By PETER MOMBELLO dnctlvtty Is very low. Make all con- Tube amplification, with its persist­ nectlon* direct la straight lines and ing noise*, has been the only thing tn solder absolutely every connection. prevent a radio *et from comparing When soldering the connections to the very favorably with a phonograph for crystal detector units make sure that clear music. Alan, because of these you remove the crystals, as they will noises, many radio fans who are satis­ be ruined by the heat or decomposed fied with the local* have gone back to by ths soldering flux. For the sake of the crystal sets to enjoy clear, natu­ tone quality use fired condensers hav­ ral and faithful reproduction. These ing a mica dielectric, and connect properties of the crystal account for these directly on the posts of ths its existence In this age of multltube transformer as shown In the diagram. set*. If the crystal can be used a* a Since different transformers vary ( detector, Why cannot it be used as an greatly In their construction. It would. amplifier (If this term la appropriate) 7 be worth while to experiment with the | A* a matter of fact. It can be used In capacity of the two fixed condenser*. ■ the latter way, and the rest of this Although a ”B” battegy of 22*4 volt* article will be devoted to the construc­ is used to force the signals through tion of a twv-atage amplifier using the amplifying transformers, the unit crystals should be built with the greatest of The following parts will be needed: care, as every bit of energy 19 tO be Two audio-frequency transformers— preserved if the amplification ¡9 tO bt one of 10 to 1 ratio and another of successful. 6 to 1 ratio; two perfectly Insulated Operating Amplifier. crystal detector units, two very sensi­ In operating this amplifier connect tive galena crystals, two mica fixed condensers, .001 mfd. capacity; one the phone terminals of the set to the ”B" battery, 22X4 volt»; six binding primary of the first transformer; then •posts and one radk>n panel. 7 by 5. All carefully manipulate the first crystal these parts are to be very efficient, until the greatest volume Is obtained. and, considering the fact that they can Follow this by manipulating the sec­ be used over and over again. It is ond crystal for louder results. After worth while to spend a little more and a little parctlce the two crystals can be worked simultaneously. get good one« the first time. This amplifier, although it cannot | Must Fellow Directions. ■ The diagram given with this article compare with the regular two-stuge must be followed very carefully. Of amplifier using tubes, will be free from ’ special importance is the connection the tube noises of the latter amplifier. after the first amplifying crystal. The Under good conditions, a crystal set wire that comes from the secondary will do very good work with this unit, of the first transformer and goes and the locals will come in as strong . through the crystal is to be connected as on the ordinary two-tube regenera­ To SVt/ ■' to the secondary of the second trans­ tive receiver. Although the range of former. If this connection should go the receiver will not be increased by l" *1 to the primary the amplifier would not adding this amplifier, the signals work, and the sensitivity of the first which were not audible will be greatly crystal would be ruined by the bat­ amplified and they will be heard dear­ ly In the phones without the usual tery. No baseboard is to be used. The straining of one r ears. transformers should be mounted at If, due to the location ‘of the re­ right angles to each other on the In­ ceiver, one of these units fails to cp- side of the panel. The first crystal erate a loud Speaker, two of them should be placed above the firs; should be constructed. The second transformer, and the second crystal amplifier should use one medium above the second transformer on the ratio transformer and one low ratio front of the panel. The connections transformer. It should be connected to both of them should be reveled to in tlie same way as the first unit, and give the best volume. The Input posts should be placed after the first unit, 5A?e/ should be on tbe left and the battery with Its Input posts connected to the Gross posts and output posts should be on output posts of the first amplifier. This the right. combination will work very well in any In wiring, use pure soft drawn cop­ case, and for the quiet satisfaction Showing How the Brats 8hould Be Prepared. per wire or gold-plated wire. Under these amplifiers give they are well no circumstances should you use the worth the trouble of construction.— the switch points that nre to he used. tinned bus-bar wire, as its surface con- New York Herald-Tribune. The distance from the bottom hole * —-— - - to these two I* the radius of the Where Trouble Comes in Tnl’“’8 and also ‘«r shifting it from switch lever. The bottom hole should • . . v c x"1 c l>rr*sent position to one wherein it he in the center of the one inch wide Altering Your 3. C. bet |* connected from tlie grid to the neg- brass strip and these two holes on ' The trouble in altering the single ntire or positive filament.—New York either side of the center line on the circuit set lies in getting the tube to Sun. strip. The distance apart will be oscillate at the high waves, and also governed by the size of the switch In the loss of volume and distance points. Plan to Test Radiation reception when dry cell tubes are used. By Inserting a nail or some other In trying to overcome these two things Will Prove Worth While straight round object through the the ultra audion circuit has been sug­ Since the Inauguration of the anti­ hole In the template and through the gested at different times, but this cir­ squeal campaign a lot of trick circuits panel the template will move around cuit In Its standard form also has in a circle that will bring the holes ahortcomings, making It little better. are coming out with claims that they do not radiate. In some instances the at the top In the correct position for If any, than the tuned plate circuit. drilling for the switch points. Hold The receiver described herein is an claims seem to have some basis. The the template solid and drill for the best way to settle beyond cavil whether Improved ultra audion circuit that fills your set radiates or not Is to arrange first point. Then move the template a test with a neighbor, say a block or up until one hole In the template so away. Agree on a time for the test covers the hole drilled and the next Agree on a wave length, or a series of switch point hole can be drilled by them, for testing. For Instance, have using the next template hole.—New your neighbor listen for KDKA from York Sun. 7 to 7:30 on a night when they are on the air. Tune your set to KDKA, then Sound Volume Is Less force regeneration and oscillation to the With Loose Coupling limit, twisting the dials and producing all the squeals possible: If the neigh­ Many fans know that a single-cir­ bor bears the squealing it’s time for cuit receiver is regarded as one of the you to get a real, loose coupled radio worst types of radiating receivers— set ot one of the type using radio that is, receivers which send out radio frequency. waves of their own and thus spoil concerts for operator* of receiving sets In the neighborhood of at least Always Keep All Your five city blocks. Parts Well Separated But not all fans rre aware of the Secondary Circuit Connected in Ultra I One of the most important things fact that tightly coupled double and Audlon Manner. triple circuit sets nre Just as bad (If the hill both In ease of osclll. tion and to bear In mind when building a radio not worse) radiators of radio waves. in distance of reception. A glance at receiver Is to keep the parts well sep­ Tightly coupled circuits are circuits In the circuit will show to the f in tlmt arated. In a three-circuit receiver, which the Induction colls (such as the It Is a two-cfrcuit tuner with the sec­ which is made up of two variometers rotor and stator of a variocoupler, and a variocoupler, bad squealing and ondary circuit connected In the ultra howling sounds will be experienced If etc.) are very close together—that Is. tiudion manner. The primary and secondary rolls of the parts are not well separated, and the “clearance” between them Is very small. the set are the stator and rotor re­ In order to prevent this the two vari­ The looser the coupling between the spectively of an ordinary variocoupler. ometers should be placed about 12 coils, the less likelihood of radiation Inches apart and at right angles to The secondary tuning condenser may and also the more selective the tuning be the one formerly used In the aerial each other. The variocoupler In a circuit of the old single circuit tuner. three-circuit receiver may be placed of the set. Of course, It Is also true that the sound volume Is less with The other variable condenser Ims a midway between the two variometers. loose coupling than with tight CO/lp •capacity of .001 mfd. This condenser ling. Is Included for the purpose of eradi- Separation of Set From Study how to reduce the evil of ra- eating the fault of the old standard Battery Is Not Harmful I diation. ultra audion circuit, L e., uncontrol­ lable oscillations. In Installing a radio receiver in a The two fixed condensers shown In home, it Is often desirable to place the Large Dial* Best the secondary circuit must be good storage battery a distance away, In Three-Inch dials are about as amali mica condensers that will not blow order to make It unseen. This can be as will afford suitable grip for operat- when the B battery Is applied, other­ done without fear of affecting the ac­ 1 Ing »nd four-in h dials nre better. wise tlie tube used In the set will be tual results obtainable from the set. Even a three and a half-inch Is better burned out. The grid condenser and The length of wire between the latter than the smaller size. If small dials leak are standard, It is suggested and the battery is of little Importance; are used, however, the principal that the constructor experiment with In fact the wire acts ns an additional i tuning control ought to have a large the grid leak in this set after lie has aerial and often helps along the regu­ ! dial and knob. Fine adjustment Is learned the tuning. Try various lar outside autenna. | impossible with a tiny knob. t V are Closing Out folks, and our complete line is moving fast. Come now and get your Now is the Time to Buy Your Christmas Shirt DRESS SHIRTS Hi-Cuts $1.75 $2.00 $2.50 $2.85 $3.35 $4.00 $4.65 Hbirts Shirts Shirts Shirts Shirts Shirts Shirts $0.85 $1.29 $1.65 $1.95 $2.45 $2.96 $3.15 $1.80 l(i-inch Hit 'utx 811.60 l(i-ilieh Redwings $ pl 1.7* 1 " : ■ 'i I loll.“*! \ $ $10.85 16-inch Chippewa S $12.75 Ki-inch Barker $ Read thoze Prices and be the Judge. J.C BRILL Successor to Peerless Clothing Co 'week end visitors at the Ciugston «inging announcer* had to compll- re! u rued Saturday night bringing n ’home in Evan* Valley. ■menl them. The mlmrtrels received Urge supply of ducks and g«e»o ‘Mr. ami /.Mrs. Robert Clugston re­ more applause than any road show ■from the Klamath country. Since the last*items were written Max Tuff« and S C. Williamson turned Friday from a month'« stay Hhwt has been In the valley nn.Mrs. W. E. Gray at her home sung. The be«litIflil violin solo I 'h/wne on the tract for the winter. He , Wednesday night, by the members played by Mr. McArthur, acrompan- J will build the house in the spring, [of her Sunday school class. Tbe Harmful Ihiacti Prolific ' led by Mrs. Tuffs, was a* alwaya, a ’when weather condition* are 'better. •girl« weje dressed In Hallowe an |rPH| piaanutp to those so fortunate . An nrlnal reimt of tlm harmful th We are glad Mr. and .Mrs. Burkhart ( costumes. Games wore played and sort» from one arre of alfalfa in wi« «s to hear him. have decided to locate among us. t otisln ran i p tn A total of 1|,t:i| light refreshments served. ' Velile Anderson and Din* Tuffs The Odd Felloiw* dance given Fri­ Ernest Jacobson, who had his — day night in ■thtU- hall was a success arm broken a short time ago. while In every way. The large crowd ex­ cranking ills car. reports It ns gel­ pressed, themselTe* as having the ting along as welt as fan be oxport- a best of times. ed and hopes soon to be wlthOilt /.Mrs. Martha Seaman who was having to have his arm In the Sling. hurt recently in a fall Is able to be Election is passed at last and Safety), Su'ifily arid Con\fr>rtahly up around the house and her friends every one Is wondering who waa I hope soon to sc« her as well as ever, elected and hoping thelc candidates NORTHBOUND FROM GRANTS PASS Mrs. IM. R. Jills» urrlved Friday ■were HUCCeHSful. Daily to Portland 9:15 a. m. morning from Julietta, Idaho, and a. will spend the winter in Rogue Riv­ Daily to Eugene 2:30 p. m. er, ait. the home* cf her daughters, Daily to Roseburg 6:30 p. m. Mrs. James Wiley and Mrs. Earl 2:30 and 6:30 p. im Stages connect to Port- ■Scott. Mrs. Bliss Is an old resident «.pile of a pouring rain a land following morning. of Rogue River valley, having lived packed house enjoyed the splendid In Medford over 30 years prior to ‘program given under the auspices of SOUTHBOUND FROM GRANTS PASS going to Idaho. [the Eastern Star on l(allowo'en In The entertainment given Friday 'the beautifully decorated community Daily to Klamath Falls 12 Noon night by the Ill-school students was 'hall. Attired In orange and black, Daily to Ashland 4:00 p. m. enjoyed by those attending. The •with plenty of cats and witches, Daily to Ashland 8:09 p. m. Judges derided ‘that, the K'ampflre 'Mesxlame* Cameron, Tuffs. Feheley, girls had the best «ttint and the oth­ •Bunch and Williamson sang a song We take passengers for nil wity points. For further er student wifi have to give them they had composed which announced Information and tickets cull Bonbonniere, phono I' a party at a future dale, it would ■the program In a more or leas com­ b- hard to Judge which was the best plimentary manner. The member» FARE GRANTS PASS PORTLANF as each class was a credit to them­ of the minstrel troupe thought It selves. ' less’ so they, more than exerted Direct Connections at Itoseburg for Coop ‘.Mr. and Mrs. liarl White and Miss Ithemselven and the result was so Bernice Cliig.don. of .Medford, were »very ■satisfactory that the critical I ROGUE RIVER 4 Travel by Motor Stage KERBY I tn