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RADIO BROADCAST ADVERTISER 225 cjjmplifier ou install power tubes in your set to get purer tones and to eliminate distortion. Concertones have a large enough core and winding to re- ceive the lowest notes from the tubes and to reproduce them without distortion or "blasting." Heavily insulated. Specified in improved Browning-Drake and other well-known circuits. Ask for free blue print bulletin. Jefferson Electric Mfg. Co. 7 argest manufacturers of smalt transformer-* 507 S. Green St. * Chicago, 111. JEFFERSON n c e r f o n e, (A.L-2 SEALEE>)AUDIO FREQUENCY TRANSFORMERS Why not subscribe to Radio Broadcast? By the year only $4.00; or two years, $6.00, saving $2.40. Send direct to Doubleday, Page & Company, Garden City, New York. manufacturers mountings -^ KROBLRK Wire Wound 10 Watt RESISTANCES for "B" ELIMINATOR and C W TRANSMITTER Sizes up to 10,000 ohms—$ 1, 25,000—$1.25, 50,000—$1.SO VARIABLE LEAK Over a Million in Use Write for Hook-up Booklet Manufacturers—Write for quotations Jobbers and Dealers—Write for discounts. C.E.MOUNTFORD ] 467 Greenwich St. New York City ( List Price 5Oc ^^^ w&venQreafer VALUE A Aristocrat E-Z TOON Vernier Pointer NEW&tristocmt Vernier Port Dial ree This marvelous, recently com- piled, 48-page Log Book (worth $i) is given FREE with every set of three Aristocrat Vernier Port Dials. Bound in beautiful, two-tone, Mocotan Leather with embossed cover. Lists every United States and Canadian Radiocast Station of record June 1st, using power of 250 watts or more. Indexed by call letters, wavelengths and location. Also_ includes the principal foreign 'stations. Ask your dealer to show you a copy. THE new, improved Aristocrat Vernier Port Dial is the greatest dial value on the market. Despite its many outstanding advantages, the Aristocrat costs no more than ordinary vernier dials. If you want the finest-looking, finest-tuning vernier dial, be sure you get the Aristocrat. Made of Bakelite. All mechanism and shaft ends are concealed. Calibra- tions appear in a beveled port with a peaked indicator that makes misreading impossible. Simple friction action is smooth, sure and quick. No gears, chains or cogs to backlash, wear out or get out of order. It may be installed in a few minutes. The famous Kurz-Kasch Split Bushing fits all condenser shafts— aligns rite, holds titel You'll be surprised at the difference a set of Aristocrat Vernier Port Dials will make. In appearance your radio will look better than the season's prettiest models. And, due to the fine, 14 to 1 vernier ratio, you'll enjoy better and clearer tones, more volume, and countless stations you've never before logged. The Aristocrat Vernier Port Dial is supplied in three attractive finishes to match any radio—black with white markings, mahogany and walnut with gold markings. The price is $2 each—in the finish you prefer. With a complete set of three Aristocrats, we are making a special limited offer. We are giving away the beautiful, 48-page, authentic Log Book illustrated here. You'll appreciate this gift when you see it. Ask the better radio dealer near you to show it to you. THE KURZ-KASCH COMPANY, DAYTON. OHIO Moulders of Plastics OFFICES: New York, Chicago, San Francisco, Los Angeles, Portland, Spokane, Denver, Toronto KURZ@KASCH oAristocrat Dials and Knobs Examined and approved by RADIO BROADCAST