We use Optical Character Recognition (OCR) during our scanning and processing workflow to make the content of each page searchable. You can view the automatically generated text below as well as copy and paste individual pieces of text to quote in your own work.
Text recognition is never 100% accurate. Many parts of the scanned page may not be reflected in the OCR text output, including: images, page layout, certain fonts or handwriting.
SPRAGUE
CONDENSERS
New Sound Products
Deluxe Amplifiers
• 13 tube, 40-62 watt amplifier has 4 mike input channels with overall gain of 128 db, 2 phono channels with 84 db gain. Uses output meter with watts and DB, bass and treble equalizer, and switch-controlled multi-impedance output transformer. Model A70-R list $102.95 less tubes. Also Model A92-R same as A70-R but with 70102 watt output. List $124.50, less tubes. Transformer Corp. of America, 69 Wooster St., New York, N. Y. — Radio Today.
20 Watt PM
•k High fidelity speaker unit using alnico field magnet, duralumin diaphragm, voice coil of aluminum wire has continuous power rating of 20 watts. Atlas Sound Corp., 1447-51 39th St., Brooklyn, N. Y. — Radio Today.
Magnetic Cutter
k Magnetic recording cutter with flat, response from 500 to 5,000 cps. Standard impedance, 15 ohms, weight, 7 oz. Sound Apparatus Co., 150 W. 46th St., New York City.— Radio Today.
"Elbow" Sound Projector
■k Dual exponential horns mounted with 90 degree included angle gives wide range sound coverage. Utilizes both sides of speaker cone, increasing efficiency. Model LW; 4 sizes; 6 to 12 inch speakers. University Labs., 195 Chrystie St., New York, N. Y.— Radio Today.
Cinema Microphone
* Crystal or dynamic mike in several impedances with special application to stage and orchestral use has wide-range pick-up. Supplied in golden gun-metal finish. Comes with 25 foot cable. Universal Microphone Co., 424 Warren Lane, Inglewood, Cal. — Radio Today.
Mobile Amplifier
k Streamline 18-25 watt, ACDC mobile amplifier and system has built-in power supply. Instantaneous change-over, optional phono turntable and crystal pickup. Three input channels, mixing facilities, tone control, and output impedances of 2 to 500 ohms. Amplifier has six tubes, max. gain 122 db, separate "off-on" AC-DC switches, standby and phono motor. Amplifier only with phono attachment, less tubes, Model A-30 MR, $89.80 list. Complete sound systems with 2-12 inch P.M. speakers, 2-parabolic reflector horns, dynamic hand-mike, ready to operate, $155.12. Transformer Corp of America, 69 Wooster St., New York, N. Y — Radio Today.
Dynamic Microphone
k Featuring a unitary moving coil system, Model DU mike has high flux density circular alnico magnet. Portion of the acoustic circuit is integral with the magnetic structure. Uses adjustable acoustic baffle. Output level, — 55 db. List $20. Astatic Microphone Lab., Inc., 830 Market St., Youngstown, O. — Radio Today.
46
RADIO TODAY