Amplifier

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OBJECT TYPE: BATTERY/TUBE/TABLE
DATE: 1924
ARTIFACT NUMBER: 2001.0288.001

MANUFACTURER: De Forest Radio Corp. Ltd.
MODEL: DE FOREST CROSLEY 51A
LOCATION: Toronto, Ontario, Canada

More Information

General Information

Serial #: C1118A
Part Number: 1
Total Parts: 1
AKA: N/A
Patents: N/A
General Description: WOOD CABINET; SYNTHETIC, METAL & GLASS COMPONENT PARTS & FITTINGS.

Dimensions

Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.

Length: N/A
Width: N/A
Height: N/A
Thickness: N/A
Weight: N/A
Diameter: N/A
Volume: N/A

Lexicon

Group: Communications
Category: Radio
Sub-Category: N/A

Manufacturer

AKA: Deforest
Country: Canada
State/Province: Ontario
City: Toronto

Context

Country: Canada
State/Province: Unknown
Period: THIS TYPE OF AMPLIFIER USED IN EARLY 1920S+
Canada: EARLY AMPLIFIER MADE IN TORONTO, ON BY DE FOREST RADIO CORP. LTD. IN 1924. (REF. 1)
Function: USED TO INCREASE THE VOLUME OF INCOMING SIGNALS AT RADIO FREQUENCY BEFORE THEY HAVE BEEN RECTIFIED BY THE DETECTOR. (REF. 2)
Technical: EXAMPLE OF EARLY SINGLE-STAGE BALANCED AMPLIFIER DESIGNED TO REDUCE OR ELIMINATE INTERFERENCE BYREDUCING THE AMPLIFICATION OF UNDESIRED RADIO SIGNALS WHILE PERMITTING FULL AMPLIFICATION OF DESIRED SIGNALS. (REF. 2) DESIGNED FOR USE WITH 'RADIOPHONE 51' RECEIVER, TO AMPLIFY SPEAKER RECEPTION. (REF. 3)
Area Notes: Unknown

Details

Markings: "De Forest/ CROSLEY/ 51A" marked on front panel. Goldtone & red decal applied to inside of lid reads "MANUFACTURED/ BY/ DE FOREST RADIO/ CORPORATION, LTD./ - TORONTO -/ UNDER CANADIAN PATENTS/ 159794 - 169332/ 174361 - 183591/ 185601 - 209618/ 218235 - 218468/ 218473 - 218885/ De Forest/ TRADE MARK REG.". "CROSLEY" marked on several internal components. "C1118A" incised on inside of top edge of cabinet front. Vacuum tube is fixed: "CANADIAN-/ WESTINGHOUSE/ WX-199" marked on tube top; paper label on envelope reads " SPECIALLY BALANCED/ DE FOREST/ CROSLEY/ RADIO".
Missing: APPEARS COMPLETE. CABINET AND FINISH ARE ORIGINAL. (REF. 1) From CA of 12/17/2001 by Matthew Bruce: No - appears complete
Finish: DARK WOOD CABINET. BLACK SYNTHETIC FRONT PANEL BEARS OFF-WHITE MARKINGS. BLACK MOULDED SYNTHETIC CONTROL KNOB. SILVER METAL TERMINAL POSTS AND HINGES.
Decoration: N/A

CITE THIS OBJECT

If you choose to share our information about this collection object, please cite:

De Forest Radio Corp. Ltd., Amplifier, 1924, Artifact no. 2001.0288, Ingenium – Canada’s Museums of Science and Innovation, http://collection.ingeniumcanada.org/en/id/2001.0288.001/

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