Radio Broadcast (May-Oct 1922)

Record Details:

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RADIO BROADCAST ADVERTISER COILS These are needed for the Armstrong SuperRegenerative Circuit 5-Millihenrie Choke Coils $2.50 100-Millihenrie Choke Coils 3.00 12000-Ohm. Non-inductive Resistances ---- 3.00 1250-Turn Honeycomb Coils 2.00 1500-Turn Honeycomb Coils 2.50 .005 Micon fixed Cond. .75 .0025 " " " .50 Attractive discounts to dealers and jobbers and immediate shipments. These coils are guaranteed correct to within 2% and may be returned within six days if found unsatisfactory. DURHAM & COMPANY Radio Engineers 1936 Market St. Philadelphia, Pa. EVERETT DOUBLE RADIO PHONES "Not the loudest hut the clearest" Light in weight, withstand amplification without distortion. AT ALL DEALERS _ 320 Broadway New York 35c Each; 3 for $1.00 Na-ald Genuine Condensite Dial The dial that runs true Numerals engraved on bevel and knob so shaped that fingers do not hide them. Thin edge with clear graduation to make reading easy. Concealed set screw in metal insert. Will not warp or chip. Finish and enamel permanent. Low price with this quality possible only through automatic production methods. Special dealer and jobber proposition — an opporlunilyt Alden-Napier Co. 52 Willow St., Dept B. Springfield, Mass. Type R2— $4.25 Type R3— $4.50 "All-American" Audio Frequency AmplifyingTransformers Two Types — Ratio 1 0 to 1 . (TypeR3) Designedfor 1 st. stage. Ratio 3 to 1 (Type R2) for 2nd and 3rd stages. Frequency Transformers. 35 SaDearbom Jt,(.llica90illl.