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RADIO AGE for December, 1925 The Magazine of the Hour 63
POWKLyS (Ms_(hdsei)!
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1. System of winding localizes magnetic field.
2. Flat-Sided units give high mutual inductance, lowering resistance.
3. New design prevents coil from picking up interference.
4. Ribbed frame of hard rubber lowers losses.
5. End ribs protect coil.
6. Windings with wide air spacing lower distributed capacity.
7. Low primary to secondary capacitive coupling, increases power.
8. Both binding posts and lugs provided.
9. Mounting bracket also supports frame. Less metal parts.
10. Design of primary gives extremely high amplification.
11. Coil extremely compact. 3"' high with bracket.
12. No coupling between coils.
The latest, most improved Coil on the market has been signally honored. Radio Age Institute is staking its reputation with thousands of radio enthusiasts all over the country by specifying and recommending the use of POWER-PLUS Coils in its Model Receiver. Radio Age Engineers have given every possible test to these superior fieldless coils. Their endorsement is conclusive proof to the fan. POWER-PLUS Coils have established themselves. They have proved their superiority!
One Dozen Improvements You Need
Study these one dozen electrical and mechanical improvements that have established POWER-PLUS Coils as the leaders in the field. They can be mounted in any position — at any angle — no neutralizes are necessary. Tuning with them is simple, speedy and sure. You get just the station you want sharp and clear — unrivaled selectivity. The POWERPLUS Kit-Set— J fieldless Coils and 3 Straight Line Frequency Condensers — all accurately matched — will give you the best in radio. The superiority of POWER-PLUS Coils and Condensers is sweeping the country. You, too, should know POWER-PLUS performance. Send the coupon below for the FREE booklet as illustrated and seven copyrighted Hook-Up Blueprints. Just fill in the Coupon — and mail it today. g|.
7 HookUp * Blueprints FREE
POWER^PLUS
A. F. HENNINGER CORP.
4507 Ravenswood Ave. Chicago, III.
A. F. HENNINGER CORP., 12
4507 Ravenswood Ave., Chicago, 111. Gentlemen :
Kindly send me your booklet and 7 Copyrighted hookup blueprints. I understand they are absolutely FREE — and I am not obligated in any way.
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