Radio Digest (Oct 1923-July 1924)

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March fS9, 192J, RADIO DIGEST— Hhts f 19 Meditations by the Inventor of King Miloplex Part XXV— More About the Miloplex Wave Traps By the Mystery Man RIDEM, Cowboy! Didja ever hear about the fellow who tried to build a compound wave trap, then came into town riding a mountain lion, with a wild cat under each arm, using a rattlesnake for a whip? Got off at the corner drug store and, with one shot at the vaselined sheik back of the soda fountain, asked for a glass of carbolic acid with a dash of iodine, and a moth ball as a chaser? Neither did I — yet he still lives and Is so tough he uses fresh cotton for lather and shaves with a blow torch — and even dares me to answer one -word of his Q. and A. He wins — you see Digest and "My Gang" need me — so I'm letting Maggie answer him. Believe me, when she starts answering — well, she simply sends it out so hot she -nas to turn down the damper. Let her start one number on her answering broadcasting program, and all of the wave traps this side of our main sulphur supply couldn't tune her out. So beware, Cowboy! If the mailman says he has a letter for you, kneel, sinner, bow down — 'cause when they come to pick up the pieces the committee will sure feel you must have met with a minor accident. Ridem, Cowboy! Let your conscience be your guide. I'll be in Kansas START rnirmTm ...iiiiiiimmimiimiimiiiiiiiii n in in i in i ii it 1 1 in i mi nun 1 1 n ihi ui ii tn ■ i i i i i i i I i i i i I t I i I I r i i I i i i I I t i i i i i I i i t t i t i . 1 1 1 1 I 1 1 i i * i i i i 1 1 1 i i I I I I I I I I 1 I I I I 1 1 1 IJLMJJJU 3 5 10 15 City eating and talking to "My Gang" at the A.R.R.L meet. Just get swept up by the time I return, as the health department is trying to keep our neighborhood clean. Miloplex Reflex And now that another teapot dome scandal has been rehearsed, just a word to you who have received my picture and reflex hook-up. Yes, you can have one— you're not too late. Send in your selfaddressed stamped envelope and get yours. Alright, yur wulkum. Get this answer to 314 letters on the King Reflex; it was designed to be used on a loop. How big? Oh, about 2 feet square with 18 turns of number 18 or 20 spaced %-inch apart. Yes, it was also designed so that on the aforesaid loop you could bring in local stations on a loud speaker using but one tube. So mercy, man, don't make me think you are mysterious by writing in and telling me you can't get stations 200 to 1,000 miles away very loud on your loud speaker. Neither can I, nor the fellow who wrote me he was fj< every night, unless ,ti<m that automatically broadcasts when it's shut down. Anyway, Mr. Havana, you are to be complimented. Never mind your sending radius — totally close down. I'll still set reports on hearing you, and that's some Cuban prize. No, sirEEE, O. M, if you want real D. X. on the King Reflex use a vario-coupler in place of the loop and ground your minus A. Possibly a few of my circuits work — at least, the audience say they do — but listen: If I ever know enough about Radio circuits and the Iuiik power of a tube to build a circuit using one tube that will bring in 1,000-mile D. X. in loud speaker volume on a loop — well, if I do (who was the dude that invented that word if?) again — I can't resist saying: it again if I do — somebody will have to pay me seven million iron men C.I.F. (cash in fist), and refuse to eat anything but gold fish and sleep in King Tut's spare bedroom, the while giving Maggie, carte blanche and money also. I'll put up a broadcasting station so powerful — well, I'll make the guy that invented "if" cross out the word. Have you missed "Howler," my dog? I have. You know I think he has been out broadcasting without a license. But he's gone — electioneering, I 'spose. Maggie called him Spot and tried to prove it, but one spot more or less meant little in his howling life, yet I never could understand why they put a guaranteed slip polish on a floor and then covered it with a Turkish rug made in Kalamazoo. How's a dog going to feel homelike when he has to dig his toenails in when making a quick "chase-me party" with the cat? (Will this guy ever cut this out and talk wave traps?) Don't throw the paper — it's too hard work picking it up again, because here's another trap and it works another trick: If you can wind wire on a coil — even tho it slips and slides and decides to spoil a perfect day — you can still lick it and possess a trap that "will cut out B.C. and spark. Come home 30 minutes early for supper and you can have it finished in time to say "Gimme" when the first dish of corned beefan lands on the pure white. Winding the Wave Trap Coil For this trap or filter I'm going to useone of Harry Schwarzberg's spasmodic primary's, a 4-inch tube 3% inches long, a .0025 variable condenser and a chuck of number 22 dec. (or cotton, if you wish) copper wire — sixty turns, or approximaieiy 80 feet in length. Start the winding one-half inch from one end of the tube, anchoring it in the usual manner. Now watch carefully. Wind on three turns and bring out a tap at the third; then two more turns and bring IF YOUR RADIO BATTERY IS BADLY SULPHATED You can bring it back with an OHIO Motor Generator CHARGER. Operates -Effectively — Silently — Economically The Ohio Battery Charging Motor Generator Set will recharge your radio "A", or three-cell automobile battery, no matter how much discharged or sulphated. It is positive in operation, recharges in one-third the time usually required, and cannot charge in the wrong direction. This is a real motor generator set. SPECIFICATIONS permit Capacity, 6-10 volts, 3-20 amperes; automatic; needs no watching while charging. Can not be injured by accidentally shortcircuiting generator leads. Ball bearing Ohio Motor and Generator will run quietly and smoothly thousands of hours without further oiling. Equipped with ammeter and rheostat to control charging rate. Long leads plugging in practically anywhere. Made of best materials; well finished; mounted on substantial base; weighs 60 pounds. Regularly equipped with 110 v. 60 cycle A. C Motor; 6-10 volt Generator. Equipped for other service if desired; prices on application. "If not satisfactory, you may return the set within 30 days and we will return the full purchase price." WRITE TODAY We can also furnish double voltage motor generators F F „ to charge "A" batteries at 6-10 volts, .08 amperes, and PARTICULARS "B" batteries at 50-100 volts, .oy2 amperes. The Ohio Electric & Controller Company S918 MAURICE AVENUE CLEVELAND, OHIO out Knottier tap, this lifting the fifth turn from tho ontlnue the winding up to tl m, whore an<. an off, and then continue by 00025 OA RECEIVER: ■OG winding on five more turns, which should be the fifteenth when the final tap is taken off, and continue the winding until 4 5 more turns have been added, which is the finish of our wedding-. Is supper ready? No! Alrlghty — let's look at it. If you I did or doi b did, 'cause I dio if you have— you should have a coil lirlfiing 60 turns, tapped at the 3rd, 10th and 15th. Atta, boy! Golly — he ga. e us the tuff ones first; this Is as easy as ing tho Btoclc yards In C!> ;<ers for ! lighthouse so they can reflex the wg Connecting Taps And now for the and finish hook onto tbi terminals — while the ta 10 and 15 go to switch poinlH. Ti • hook it up la just as easy — look at the diagram; I as clear as rnud. There now, ilr. Radio Smith, is your trap — ready for assailing up to <oo meters that thinks it by. But what is it? a big word— sort a like KOKOLOKA, and means in Radio lanirun <e a QUENCHER, but if I named it Dieest might decide it was free publicity, but if you saw it theoretically described it would be called a conductively coupled auto transformer having an untuned or spasmodic primary and variable ratio of primary to secondary of from 1 to 5* up or down to 15 to 4 5. More Circuits to Come With one exception (because there is (Continued on page 29) All Type*^ fThe Peak yiimilliiiiwiuiiiiiiiiiiiiilliilllllll ii I milllllllf of Quality — PREMIER PARTS M: Actual Size "DUOSTAT" Trade Mark Two Rheostats in One Tou will see the advantage of this remarkable new apparatus at once. A real innovation. Think of if! One liigh-class Rheostat that completely replaces two of the ordinary types; does the work even more efficiently, and, in addition, greatly simplifies installation and wiring. One hole to drill. THAT'S ALL. That's what you get in the "DCOSTAT." Two independent resistor windings, each operating one tube. Bakelite Moulded Base, silver etched dial. "N1CHROME" wire windings. Made for all types of tubes. No. 12, two windings, each 7 ohms. No. 13, two windings, each 25 ohms. No. 14, two windings, each 40 ohms. Price all types $3-4)0. 19 Years Making Quality Electric Products J?r*m«»r fotlvit fampuny 3810 Ravenswood "HEGEHOG" Trade Mark Reg. Audio-Frequency Transformer "We back this little wonder to the limit. For all around efficiency and compactness it is unexcelled (jive it a thorough tryout. Install it in Xeutrodyne, Autodyne, Superdyne, Miloplex, Autoplex, or any of the latest "hook-ups." it for volume, tone quality and consistent performance. Give it every possible test. Then consider its size and price. If you do not find the "HECEHOG" unsurpassed in every way, your money will be gladly refunded. We guarantee it unconditionally. Make this test. 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Montrose Vernier Cond.. 3.65 II PI. U. S. Tool 3.35 23 PI. U. S. Tool 3.65 43 PI. U. S. Tool 4.10 Single Socket* Neutrodons Complete Parts for Neutrodyne 5 Tube Set I 7x26 Panel 2 1 Triple Socket 2 3 N eutrof ormers 2 All American Transformers I Battery Switch 3 4" Dials Fada Type I Power Rheostat I Vernier Rheostat 8 Binding Posts I Closed Circuit Jack 1 Filament Control Jack 27 Ft. Insulated Tubing 27 Ft. Tinned Bus Bar 2 Fixed Conffensers P06 Mfd. 1 Fixed Condenser .00025 Mfd. I Grid Leak 2 Megohms I Diagram for Above Set Our Price $32.50 HEATH'S RADIAN VERNIER CONDENSERS 13 Plate $4.75 23 Plate 5.25 43 Plats 5.95 VARI0COUPLERS Fisher, 180' $2.35 Shamrock 2.65 Sleeper, no taps 3.75 Workrite 2.»5 Gillfillan, small 5.95 Gillfillan, large 7.45 Pathe 3.25 Genuine All Wave 5.35 Cockaday Coil 1.85 Unxld, ISO . 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I Boil Socket I ERLA Betex Transformer I ERLA Audio Transformer I .062 Fixed Dubilier Cond. I .001 Fixed Dubilier Cnnd. 1 .00025 Fixed Dubilier Cond. 2 3" Dials Fada Tyee I $ Ohm Tillman Rheostat 8 Marked Binding Pasts 12 Switch Points 4 Stops I ERLA Fixed Crystal I ERLA Blue Print Our Price $19.45 Bell Socket, Bakelite Panel Mounting $ .89 Amsco 6 ohm Rheostat 95 Amsco 20 ohm Rheostat 1.15 Amsco 30 ohm Rheostat 1.25 Amsco 400 ohm Potentiometer. 1.40 Cutler-Hammer 6 ohm Rheostat. Plain 95 Cutler-Hammer 6 ohm Rheostat, Vernier 1.20 ELECTRAHOT Solder iron... 2.50 New Improved Cockaday Coll.. 5.50 MISCELLANEOUS Path* Pulsiformers $8-50 New Improved Cockaday Coils, silk wound 5.50 Cutler-Hammer 30 ohm Rheostat, Plain 1.20 Cutler-Hammer 400 ohm Potentiometer 1.20 Filkostat 1.85 Bradlcystat or Bradleyleek I.7C Bruno 14 Tap Inductance Sw.. .70 Sta put Phone Plug 35 Phone PUig for 6 pr. Phones. .$1.25 Phone Ptog fer 2 pr. 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