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49
No.
Name of Apparatus
Manufacturer
Use of Product
Price
Remarks
10. 11.
12.
13. 14. 15. 16.
17.
18.
Horn Loud Speaker (Burns)
Six-Tube Receiver
Cone Loud Speaker. Loop
Horn Loud Speaker (Wonderphone)
Pedestal Cone BaffleBoard Loud Speaker
A Battery Eliminator
Cardwell Transmitting Condenser
Jack Switch
American Electric Co., State & 64th St., Chicago, Illinois. Heath Radio & Electric Mfg. Co., 206-10 First St., Newark, New Jersey.
Tower Mfg. Co., 98 Brookline Ave., Boston, Massachusetts
W. I. Thomas Company, 217 N. Desplaines St., Chicago, Illinois.
Universal High Power Tel. Co., Carlton and Eddy Sts., Seattle, Washington. The Rola Co., 45th and Hollis Streets, Oakland, California.
Davey Electric Corporation, 505 Court St., Brooklyn, New York.
Cardwell Company, 81 Prospect St., Brooklyn, New York.
Carter Radio Co.. 300 S. Racine Ave., Chicago, Illinois.
Sound reproducer for receiving sets.
Broadcast reception.
Sound reproducer for receiving sets.
Signal pick-up device.
Sound reproducer for use with receiving sets.
Sound reproducer for use with receiving sets.
Replaces the usual 6-volt storage battery as a source of vacuum-tube filament supply.
A tuning device for short-wave transmitters.
For "making" and "breaking" circuit in a receiver.
$10.00 $69.50
$ 9.50
$45.00
$47.50 $52.00
Variable ^ $7.OO-$70.00 I Fixed ( $4.50-$15.00;
$1.00 to $1.60
A horn loud speaker employing a unit which may be adjusted for maximum sensitivity. A semi-wired receiver consisting of Heath units. It is easily and simply connected together to form an efficient 6-tube receiver employing 3 stages of Heath resistance-coupled audio frequency amplification. An inexpensive cone loud speaker in the lower-price field.
A knock-down loop that may be assembled in a few seconds. To facilitate "pointing" the loop, the frame pivots on a swivel.
A typical horn loud speaker having a curved throat and wide-flared mouth.
This high-quality reproducing unit is a combination of cone and baffle-board speaker. It is substantially and handsomely constructed. Combining the units of transformer, rectifier, and filter, this A supply furnishes sufficient current to operate up to ten tubes. May be obtained in either l^-ampere or 2-ampere sizes. To resist possible breakdown due to high voltages, the plates in this variable tuning condenser are liberally spaced.
This switch is of the panel mounting type. It may be obtained in several models, each for a specific circuit purpose.
In