Radio Broadcast (Nov 1926-Apr 1927)

RADIO BROADCAST ADVERTISER 311 See that Screw f A screw-driver adjusts an X-L in crowded places X-L VARIO DENSER RESULTS in easier tuning, more distance, volume and clarity — greater stability. Indorsed by leading authorities. Model "N" A slight turn obtains correct tube oscillation on all tuned radio frequency circuits. Neutrodyne, Roberts two tube Browning-Drake, McMurdo Silver's Knockout, etc. capacity range 1.8 to 20 micro-micro farads. Price $1.00 Model "G" With grid clips obtains the proper grid capacity on Cockaday circuits, filter and intermediate frequency tuning in heterodyne and positive grid bias in all sets. Capacity range. Model G-i — .00002 to .0001 MFD Model G-5— .0001 to .0005 MFD Model G-10 — .0003 to .oor MFD Price $1.50 X-L Push Post. Push it down with your thumb, insert wire, remove pressure and wire is firmly held. Releases instantly. Price 15c* Push Post Panel permanently marked in white on black rubber. In box in 1 eluding soldering lugs, raising bushings and screws for mounting, etc. Price $1.50 (T^i (fr**) 1 j y y y y y X-L Radio Laboratories y y 2424 Lincoln Ave. CHICAGO, ILL. fe .DOUBLES POWER AND DISTANCE Marvelous newlyinvented ground gives incredibly improved reception Doubles power and distance users say. Reduces leakage. Stops jangling even in mid-summer. Results never before equblled. Satisfaction guaranteed or mone\ back at once. Approved by Highest Radio authorities after exhaustive tests. Proven absolutely essential to clear, powerful distance reception. Draws and holds moisture indefinitely. Highly sensitive to radio energy SENO NO MONEY— To introduce, we offer to those who act at once, regular S5. 00 size for only §2 00. Send name today and pay §2.00 plus 17c postage on delivery. Or send only §2 00 with order and save postage. and details of amazing special offer on request — write today. G R I D G ATE 6 RESISTOR There's no thunder in these h/tetaloids — no crackle or noise of any kind. They're Quiet I The resistance element is colloidal and smooth — not crystalline, ragged and noisy. Adopted by leading set makers. They're perfect! Ask your dealer or write for leaflet AMSCO PRODUCTS, INC. Broome and Lafayette Streets New York City Y<# GROUND HOG BH.M'i.'i.ii!i.;.i; Order your copy of Radio Broadcast from your news dealer or radio store. Make sure that he reserves a copy for you each month. If your favorite radio store does not stock the magazine write us giving name of radio dealer and address. SEND FOR THIS RADIO FOLDER Contains seven hookups for B-Eliminators published in a prominent radio magazine. Well-known B-Eliminator Manufacturers who use Bradleyohms Acme, All-American, American Bosch, Brown & Green, DeWitt-LaF ranee, Farrand, Forest Unitron.Grigsby-Grunow Hinds (Majestic), Kellogg, Philadelphia Storage Battery (Philco), Precision, Radio Receptor; R. A. Rothermel, London; Spartana, Valley, Willard, Wilson. When You Build a B-Eliminator Use Bradleyohm-E for the Variable Resistors and Bradleyunit-A for the Fixed Resistors ALWAYS insist that Bradleyohm-E and Bradleyunit-A are included with your B-Eliminator kit, if you want to be assured of perfect voltage control. The leading manufacturers of B-Eliminators have long since adopted these Allen-Bradley variable and fixed resistors as standard equipment for their B-Eliminators. In fact, Bradleyohm-E is used almost as universally as the Raytheon tube, itself. You cannot afford to risk the use of inferior substitutes for the scientifically treated discs used in Bradleyohm-E. This remarkable variable resistor handles the strenuous requirements of B-Eliminator service without the slightest strain. Ask your dealer for Allen -Bradley Perfect Radio Devices, today. MAIL THE HANDY COUPON Bradleyohm-E For B-eliminator service requiring wide voltage control, Bradleyohm-E is essential. It is an oversize Bradleyohm with sufficient capacity to handle all normal B-eliminator requirements. Be sure to ask for Bradleyohm-E in the checkered carton. Your dealer can get them for you. Bradleyunit-A This solid, molded, fixed resistor has no glass or hermetic sealing in its construction. It is a solid unit with silver-plated end caps and is not affected by temperature, moisture and age. By .11 means, use Bradleyunit-A when you need a fixed resistor. Allen-Bradley Company 278 Greenfield Avenue Milwaukee, Wisconsin Please send me, FREE, your radio folder with seven B-Eliminator hook-ups. Name . Address . -At Examined and approved by Radio Broadcast -fa