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RADIO BROADCAST ADVERTISER
179
You Will Marvel at the Tone Reproduction of the
TEMPLE
AIR COLUMN
SPEAKER
People are positively astonished when they hear the TEMPLE AIR COLUMN SPEAKER for the first time. The marvelous clarity and purity of tone is amazing.
The TEMPLE AIR COLUMN SPEAKER brings new joy in radio. Thruout the entire musical scale this superspeaker is sensitive beyond comparison — unequalled for tone quality. Dance music — organ recitals — opera — hear them now in a way you never dreamed was possible!
Not a Cone
This new type speaker is selling like wildfire all over the country. New enthusiasts by the thousands are buying TEMPLE. Eddie and Fannie Cavanaugh, the Gaelic Twins of KYW, Chicago, say: "We have tried many speakers but none have the wonderful tone quality and volume of the TEMPLE."
Hear a TEMPLE AIR COLUMN SPEAKER demonstrated on the TEMPLE COMPARATOR at your nearest dealer. Make this test: Close your eyes as you hear different speakers. You'll pick the TEMPLE every time because of its unfailing purity and richness of tone reproduction.
CONSOLE CABINET MODEL No. 65pricedl at $65.00; west of Rockies, $75.00
AIR-COLUMN MODEL No. 13—13 inch —priced at $29.00; west of Rockies, $32.00 AIR-COLUMN MODEL No. 18—18 inch —priced at $48.50; west of Rockies, $55.00
If your dealer cannot supply you write for complete information and name of our nearest Temple dealer
TEMPLE, Inc.
213 S. Peoria St., Chicago, 111. LEADERS IN SPEAKER DESIGN
Raytheon Type B H
Type R Voltage Regulator
i -F>45v
Here is the power unit youHU want to build
In the advancement of light-socket receiver operation, Raytheon Research Laboratories have designed several circuits which take the fullest advantage of Raytheon Long Lite Rectifying Tubes. Look at the diagram above. There is a power unit which maintains constant voltage on the 90 and lower volt taps and greatly improves voltage regulation on the 180 and 135 volt taps regardless of variations in either the line voltage or load current.
This unique performance is accomplished through the use of that remarkable tube — Raytheon Type R Voltage Regulator. Its advantages are many. It eliminates ripple and "motor boating", dispenses with enough parts in the construction of a power unit to pay for itself, and improves reception beyond the possibilities of any other regulator.
Circuit diagram and latest bulletin on Type R Voltage Regulator tube gladly sent upon request— write today!
RAYTKlEON
»E6.U i. aUCS of
i'PE R 90 VOLTS RAYTHEON MK.COMWJtf
RAYTHEON TYPE BH Standard for "B" Power Units Because its output does not drop off in service, this 125 milliampere tube is especially valuable for use in conjunction with the Type R Voltage Regulator. At all reliable dealers. Price $4.50.
RAYTHEON TYPE R Voltage Regulator Maintains constant voltage on the 90 and lower volt taps regardless of changes in line voltage or in load taken from the unit. Eliminates ripple and "motor boating". Starting anode obviates "going out". Price $4.00.
RAYTHEON MANUFACTURING COMPANY 309Kendall Square Building Cambridge, Mass.