Radio Digest (Oct 1923-July 1924)

RADIO DIGEST — Illustrated January 12, 192k SIMPLEX HOOK-UP WITH A TWO SLIDE TUNING COIL secured. During a few cool nights many of the above stations were heard on th* loud speaker and R-3 Magnavox, and the music and speech sometimes audible for some 30 feet. Also, this set will appeal to the class of Radiophans that come under the heading of "DX hounds." Not far off are the days when the DX reception will once again be at its height. This year we are looking forward to more remarkable records than were made durir ; last winter. The fan that stays awake until the morning hours will probably feel rewarded when he will find himself able each night to tune in on the "nighthawks" or Denver or Havana. In the next installment of this series I will give operating instructions and let you know what should be expected from this set when properly built. Don't fail to read next week's article which is the third in this series. (TO BE CONTINUED.) B" BATTERY PHONES GROUND HERE'S a real simple Simplex hookup. Just a two slide tuning coil and a variometer with the usual accessories for a detector tube, that is, a 1-megohm grid leak, a .00025 grid con denser, socket, rheostat, battery and a 22% -volt B battery. This, with the phones, makes up your outfit. An 80-ft. single wire aerial, a good ground connection and you're all set to listen in for some real good results. No pretense is made on long distance work, but it is a good reliable hook-up for the fan just starting in. provided he doesn't expect to get 2LO, London, on a single tube. THREE TUBE RECEIVER (Continued from page 17) equal to any audio frequency set of today. That is, it embodies characteristics of many circuits. Selectivity, volume and extreme sensitivity are a combination hard to beat. (See last week's issue for further data in this connection.) I have had quite a few reports and all but one are favorable. This fellow expressed his appreciation of the circuit, but he claims to have been unable to receive the stations using the higher waves. A mere loading of the circuit with two small honeycomb coils /•S WE REPAIR THE FOLLOWING RADIO TUBES Dealers and Agents write tor Special Discount Marl Orders Solicited and Promptly Attended to WD-IK WD-I2S OUR SPECIALTIES S5 WATT (TRANSMITTERS UV-199 $3^50 UV-200 2.75 UV-201 3JH) UV-201A 3.50 WD-11 3.50 DV-6 3.00 UV-202 4.00 UV-299 3.50 C-299 $3.50 C-300 2.75 C-301 3.00 C-301A 3.50 WD-12 3.50 DV-6A 3.50 C-302 4.00 should have secured for him the expected results. To this writing an answer has not been received, therefore I am not able to give you his further comment. Range of Circuit This set has been used by the author in New York and no difficulty has been experienced in tuning in and out all of the metropolitan stations at will. Such stations as Cincinnati, Buffalo, Cleveland, Washington, Boston, Detroit, Chicago, Indianapolis and Louisville have been heard in the last three weeks. These stations are tuned in during the middle of \BBALmm PROMPT SHIPMENTS I {LIBERAL DISCOUNTS! "ERLA" Hi New Type m^% 3t^^fc. I Reflex Transformers P. O. Box 22-A Clinton Hill Station NEWARK, N. J, H& H™i?™mpany I ;i']»>fr]:nriifl All Erla reflex parts in stock including Hilco Variocouplers and Rathbun Condensers. Dealers send for Catalog and discounts •7ri<ftt!! *U>tnqn£t6£ 'tannest e/xcElUu/ite, RacUo 123 W. Mad iron It. Chicago The Tube's the Thing! Get Radio Reception Without Noise MYERS vSSSS. TUBES Guarantee Perfect Clarity Concerts, speeches, stories — hear them without noise or tube hiss with Myers Tubes. They give much greater amplification, are perfect detectors and oscillators. They add 50% to the efficiency of your set because they reduce interference. sroo Twn TvnPS* Myers Drv. Battery Tube, 2'/2 Volts, 54 Ampere. llfU lrpci. Myers Universal operates on either 3 Dry Cells or storage batteries. Ready for mounting. No sockets or extra equipment needed. $5.00 each. See that you get the New Improved Myers Tubes with the coating. Others are not guaranteed. 5 i EACH At your Dealer — otherwise send purchase price and you will be supplied postpaid SOLE MANUFACTURERS RB. Myers (o. Ltd. 240 Craig St. West, MONTREAL, CANADA the evening. After an operator has had some experience he will be able to obtain the same results, and under more favorable conditions much better results will be ."okmIcX ./Uamiiutfd Pltrnolic umdmsaiion Product , SHEETS TUBES RODS RADIO PANELS P0USHED BLACK FINISH CUT PERFECTLY SQUARE TO ANY SIZE VZZ THICK '/2* PER SOL INCH K|6" THICK % < PER SO. INCH Vzz" THICK K PER SO. INCH '/e " THICK t'/z< PER SO, INCH 3/\6" THICK 2* PEP. SO INCH '/& " THICK 2/2< PER SO INCH S/& " THICK 4< PER SO INCH l/Z " THICK 5 VA< PER SQ INCH .SEND FOR COMPLETE PRICE LIST PROMPT ATTENTION TO MAIL ORDERS OEALERS PRICES ON APPLICATION STAR RETT MFG. CO. 519 SOUTH GREEN ST. CHICAGO Spacing Wires The set builder should always remember that space is the best insulator for the high frequency currents used in Radio. Especially in a multitube reflex set the wires must be kept as far apart as possible. The success of a reflex set depends very largely on well-spaced wiring, for the balance between the circuits is very delicate and interference from one part may completely upset another. Most people simply open the window, bring the lead-in across the sill and close the window. A short piece of porcelain tubing should be used so as to prevent leakage. m. Burned Out or Broken r\ RADIO TUBES REPAIRED All Tubes Guaranteed to Work Like New Mail Orders Given Prompt Attention 24 HOUR SERVICE— All Tubes returned PJP. CO J). RADIOTRONS CUNNINGHAMS WD-11 or 12 $3.50 C-ll or 12 $3.50 UV-200 2.75 C-300 2.7S UV-201 3.00 . C-301 3.M UV-202 3.S0 C-302 3.50 UV-201A 3.50 C-301 A 3 J» UV-199 3.S0 C-299 3.50 DV-1 or 2 3.50 DV-S or SA 3.N RADIO TUBE CORP. 70 Halsey St. Newark, N. J. SEND TO NEAREST REPAIR BRANCHES "RADIO TUBES" 39 West Adams St Chicago. III. RADIO TUBE SPECIALISTS 137 Market St. Phila.. Pa. GLOBE ELECTRIC CO. 609 Chamber of Commerce Bldg.. Pittsburgh. Pa. WHOLESALE RADIO MAILING SERVICE 1133 Broadway, New York City "Buy Your Radio by Mail at Wholesale Price*" PHONES $4.75 4.75 9.75 10.50 Ambassador 3000 ohm. 3.75 4.50 Morrison Loud Speaker 8.50 NEUTRODYNE Complete, Genuine, Guaranteed Parts for S Tube Set $32.50 COCKADAY Complete Parts for Single Tube Set... $11.75 Variocouplers and Variometers Shamrock $2.75 Sleeper No Tap Coupler. 3.75 180 deg. Coupler 1.95 Cockaday Bank Wound. 2.45 Columbia Multi-Circuit 4.75 Capitol All-Wave 5.25 Workritc Neutroformers. 4.85 TRANSFORMERS Federal No. 65 .$5-25 . 5.50 Acme Audio and Radio 3.95 Modem Push-Pull. .11.50 Tri-Coil Radio Free... . 1.75 . 4.50 MISCELLANEOUS ..$ .45 .. .40 HoneycombGeared .. 4.25 .. .35 12 Point Inductance Switch .. .85 2.75 TUBES Supertrons— UV-200. ... $3.50 Supertrons— UV-201 A ... 3.75 . 3.75 A Guarantee is enclosed with each Tube DeForest DV-6 4.25 DeForest DV-2 5.75 LOUD SPEAKERS Western Electric I0D.. $44.50 Magnavox New Type.. 29.50 Herald Loud Speaker.. 28.00 Music Master 27.50 Brandes Table Talker.. 9.75 Music Master Style Horn 9.50 Dictogrand 19.50 CONDENSERS Bakelite Ends— Highly Efficient 23 Plate .0005 $1.65 43 Plate .001 1.95 23 Plato Vernier .. 43 Plate Vernier 3.25 RHEOSTATS 6 ohm $ .35 30 ohm ; Federal 25 ohm 1.25 Bradleystats 175 CHARGERS 5 Amp. Tungsr with Bulb $23.30 2 Amp. Tungar with Bulb 15.00 Hemcharger Gold Seal 15.00 D. C. Charter 9.SO Westinghouse Sr. Set Complete with WD-11 Tabes. Pair of Brandes Phones. A 6 B Batteries $39.75 LET US SAVE YOU TIME AND MONEY m Ji