Radio mirror (Jan-Oct 1923)

■P June p, iq-'J RADIO DIG 1' ST 15 Questions and Answers Reinartz Panel Set (357:') WJM. Rensselaer, N. Y. I believe it would prove advantageous to many of your readers as well as many who never saw them to reprint the drawing of the Reinartz circuit that appeared in vour paper November 25. I lent my copy to a friend but it has never been returned and 1 am very desirous of getting another. I built my Reinartz through the aid of your specifications and it is my favorite set. It has proven very selective, which is desired by most owners, for it brings in the distant broadcasting stations exceptionally well. Often it is very poor on local stations and only last night I could not tune in a concert which was being sent out only about two miles away but could get WGR at Buffalo fine at the same time by a mere turn of the vernier condenser. I have the detector with one stage and attempted to add a second stage but with no success. Xo better than one stage, although I have gone over wiring and all details without finding anything amiss. Some drawings show a plus to secondary of transformer, others a minus. Have tried both but no better. I am well pleased but would like to add the other •stage so could use a loud speaker. I an get broadcasting from 4 p. m. until * a. m. nearly every day if I care to tune n. The farthest point reached is Omaha, Nebraska. This is no record but I am trying to improve my set to establish a rec ord. I desire to get the Pacific stations. I would like a drawing showing how to hook on the second stage of amplification showing the variations to make. Also data on choke coil and advantage and how to make and whether battery is used when the rheostats are turned off. What I actually want to know is, if it is sufficient to turn rheostats of A battery off when not in use in order to not use either A or B battery or must the wires be taken from the binding posts of the A and B battery. It seems peculiar that I cannot get my second stage to function. I have used the same wiring plan as the first on which I have, in my estimation, good results. I have tried using separate B batteries of 45 volts for the one stand second stage, also have tried making all connections on one B battery. I am using jacks so If you should publish a diagram make jack connections plain. A. — Answering your inquiry with reference to difficulty encountered in adding amplification to otherwise satisfactory functioning Reinartz circuit we are advising that it is our opinion that you have a faulty amplifying transformer. It might be, however, due simply to the fact that tube is not making a good contact in socket. Attention to these details should remove the limitation experienced. In the matter of connecting transformer, secondary must go to the negative side of A battery. Battery current is not consumed when rheostat is turned off. We are directing your attention to page thirteen of March 3 issue of Radio Digest for a diagram of circuit in question showing method of adding two stages of amplification with jacks for plugging 'phones in on detector. As per your suggestion we are repeating the hook-up illustration that appeared in the November 25 issue. PHANTOM-CIRCUIT Build Your Own. This maiTel of mystery, using no loop no aerial and no ground, brines in music instead of interference. We have heard stations 950 miles distant on one tube. By using WD-11 tube set can be entirely self contained. Very easy to build from our instructions, use your own snare parts, nothing complicated like radio frequency or super regenerative. Only one tuning control. Complete Instructions, with hooltup and photo of circuit mailed to you for 60 cents. Stamps accepted. VESCO RADIO SHOP. Box D-704, Vacaville. Calif. r =\ Electric Soldering Iron A. C. OR D. C. CURRENT DEALERS — Attractive Discounts TWO SUPERSENSITIVE CIRCUITS (Both Copyrighted) My Highly Improved Reinartz brings in all important stations on both coasts and Mexican border, loud, clear and without distortion. We dance to music from Atlanta received on one loud Baldwin unit. Build one of these wonderful sets from my blueprints and specifications, price 50e, or with a j>erfect and complete double wound spiderweb coil, J.3.00 by mail. No other windings used. Photo of my set on a glass panel with every order. Tbis copyrighted circuit is the most successful of any Reinartz modification yet produced, and Is imitated the most. Thousands arc in use. My W. D. II Circuit is especially designed for use with the "Pickle" tube and brings out the full value of tLat little tube as no otlier circuit can. Stations 1000 miles away come in clearly on one tube. This set is small, complete, portable. For the man who wishes the highest efficiency, this is the set to build. Price of blueprint and specifications, 50c. or witli complete and perfect windings, $3.00. Photo of set with every order. Either set is easy to build, easy to operate. Everything clearly shown. Sets built from these plans will receive all broadcasting stations operating under the new laws. Their wave length range is from 140 to 670 meters. S. A. TWITCHELL 192S Western Ave. Minneapolis, Minn. Just Consider —the essential features necessary to make an audio frequency transformer a good one — 2. High Amplification. 2. Minimum. Distortion. Low Interstage Linkage, Convenient Mounting. 5. Compactness. Cotoco transformers make / these ideal features facts. And the finish will surely please you. "Built First to L<ui" $5.00 At Your Dealer's G0T0-C0IL CO. PROVIDENCE Loop Aerial (3444) FIIG, Seward, Nebr. What size loop do you recommend to work with a single tube rellex circuit, as shown on page M of the March 17 issue of Radio Digest? Also will it receive Radiophone messages and music? "Good Luck" to "Logwood," and same to you. You publish a good, clean, clear paper and I look forward to it each week. A. — Answering your inquiry, we are advising that an effective loop aerial is accomplished with ten turns of wire, paced one-half inch apart, on a three-foot square frame. Frankly, we would not admit that a loop aerial will afford the satisfaction of an out-of-door aerial construction. The reflex circuit is effective and affords a reasonable degree of gratification in operation. PATENT ATTORNEYS PATENTS. Booklet free. Highest references. Best results. WATSON E. COLEMAN. Patent Lawyer, 624 F Street, Washington, D. C. RECTIFIES. MULTIPOINT (Patent Pending) A Synthetic CRYSTAL DETECTOR sensitive over its entire surface Eliminates all detector troubles. Extraordinary clearness and volume. Endorsed by Badio experts and presB. Sold in Sealed Packages only. Join the ever increasing Rusonite fans. Price mounted, Sensi PA. tiveness guaranteed OUC RUSONITE CATWHISKER 14 Karat Gold Multiple Contact Super OPSensitive *JOC Order from your dealer or direct from us. RUSONITE PRODUCTS CORP. 19 Park Row, N. Y. foi W.D.ll tubes Standard, threaded rubber, Willard's specially adapted for use with WD-11 Tubes. Supply current at 2 volts to one WD-11 Tube for 210 hours on a single charge. Rechargeable. Brand new, size 4x5;4x7 inches — Chi-Rad guaranteed. 2-Volt WiUard Charged. . .$7.50 2Volt WiUard Dry 6.50 These same Willards can be adapted to deliver 8 volts for pure D. C. for C. W. Transmitters. Better than a generator because no filter is necessary. Much less expensive. In lots of 40 (320 volts) .$160.00 (Better prices on larger quantity) Specify dry or charged when ordering. CkicagoEaclioAppai'atusCo. 415 S.Deavboi'nSt, Chicago, III. a »? make PERFECTION your SELECTION We Carry Only STANDARD Advertised Radio Equipment. Every Product Sold on a MONEY BACK GUARANTEE. PDrp A $1.25 VOLTMETER OR AMMETER GIVEN WITH EACH COCK" r *VCC PURCHASE OF $5, OR OVER r *X.dd MAGNAVOX LOUD SPEAKER, Type R. 3. $24.95 Nathaniel BALDWIN Phones $4.60 List $6.00. SINGLES, with Cord, . Special List $12.00. DOUBLES, with Cord | and Band FLEWELLING CIRCUIT Complete parts, including PANEL, Double Coil Mounting and 2 Honeycomb Coils, Mounted. ONLY Standard Equipment Used. ' FREE DIAGRAM $11.95 REINARTZ CIRCUIT Complete parts for this remarkable <CQ QC set. FREE DIAGRAM <$&,%**} HE" PftRFST DV 6 TUBES. MJH. rKJIKCJ » The popular De Forest tube $3.75 detector or amplifier. List $6.00 WESTERN ELECTRIC Phones. None better made-. List $12.00. Our price $7.95 N. & K. PHONES 6000 Ohms. None Better Made for OX Reception Imported. List $16.00 $6.50 QUEENS VARIOMETER, any. Guaranteed Quality. List $6.00. Our Special Price Treated Mahog $2.45 TIJNflARA c BATTERY CHARGER. * *»'i'vart*xGeneral Electric quality product. $18.00 List— 2 Amp. Special $28.00 List— 5 Amp. Special $14.95 $22.95 COCKADAY CIRCUIT Complete parts for this wonrierfu circuit $13.50 QUEENS 180° BAKELITE COUPLER. Silk Wound. List $5.00. I Our Price $2.45 TRIPLE MOUNTINGS, with Leads. List $5.00. Our Price.... DOUBLE MOUNTINGS with Leads. List $3.50. Our Price $3.25 $2.25 Complete Parts for 2 STEP AMPLIFIER, including Panel, I 10 to I Ratio Transformer, I 5 to I Ratio Transformer "All American" Transformer used. $13.50 "B" BATTERIES ^ List Price EVEREADY— No. 7G3— 22% Volts. . .$1.75 $1.45 EVEREADY— No. 767—15 Volts 5.50 4.50 BRIGHT STAR— No. 15-50^-22% V. . 1.75 1. 10 BRIGHT STAR— No. 15-03-6—22% V. 2.25 1.45 BRIGHT STAR— No. 3(1-90 — 45 Volts. .5.00 3.50 FRANCO— No. 1529V— 22% Volts 2.50 1.85 FRANCO— No. 3045V— 45 Volts 5.75 3.95 2 STEP AMPLIFIER Perfection Quality. Completely made, ready to use — Guaranteed $11.95 TUBES UV-20IA. $6.50 PANELS— 3/16" Thick Hard Hard Rubber Bakelito Bubber Bakelite 7x18.. ...$1.65 $2.45 7x10.. ..$0.95 $1.35 7x21 . ... 1.85 2.75 7x12.. .. 1.25 1.60 7x24.. ... 2.15 3.25 7x14.. .. 1.40 1.95 CABINETS Extra fine quality — Hinged top — Mahogany finish. 7x10 $2.75 7x18 $3.50 7x12 7x14 2.95 7x24 3.95 3.95 3.25 12x14" V. T. 2 TUBES Genuine Western Electric Tubes. The Best Amplifying Tubes Made $6.75 CROSLEY One tube Regenerative Set. Will (1 Q (\fi receive over 1000 miles «p 1 &*\J\J $17.00 CROSLEY 2 Step Amplifier to match above, Mahogany Cabinet CROSLEY 2 Step Amplifier to match above (same size Mahogany Cabinet) complete with two *«. Cf. Deforest DV-6 Tulles. Special... ipZl.OtJ PERFECTION RADIO CORPORATION, Mail Order Dept. 59 Cortland St., NEW YORK CITY Stores also at 119 West 23d Street, 78 Cortland Street and 128 Chambers Street WHOLESALE AND RETAIL