Amplifier

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Ingenium, 1975.0505.001
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OBJECT TYPE: TELEPHONE/SINGLE TUBE
DATE: 1926–1929
ARTIFACT NUMBER: 1975.0505.001

MANUFACTURER: Bell Telephone Co. of Canada
MODEL: 309A
LOCATION: Unknown

More Information

General Information

Serial #: N/A
Part Number: 1
Total Parts: 1
AKA: N/A
Patents: N/A
General Description: WOOD/ METAL/ GLASS VACUUM TUBE/ COATED WIRES

Dimensions

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

Length: 22.7 cm
Width: 17.8 cm
Height: 16.5 cm
Thickness: N/A
Weight: N/A
Diameter: N/A
Volume: N/A

Lexicon

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

Manufacturer

AKA: Bell
Country: Unknown
State/Province: Unknown
City: Unknown

Context

Country: Canada
State/Province: Unknown
Period: DONOR NOTE IN SUPP INFO EXPLAINS TIME PERIOD BUT VERY DIFFICULT TO TRANSCRIBE
Canada: MADE & USED IN CANADA
Function: TO AMPLIFY RADIO PROGRAMS ON TELEPHONE LINES
Technical: ONE OF THE EARLIEST PROGRAM AMPLIFIERS IN THE NMST COLLECTION
Area Notes: Unknown

Details

Markings: EMBOSSING ON BATTERY TERMINALS ON REAR PANEL:'NORTHERN ELECTRIC/ MADEIN USA'/ EMBOSSED ON METAL RIGHT BATTERY COVER:'NORTHERN ELECTRIC/ MADE IN CANADA'/ ENGRAVED ON RIGHT SIDE OF INPUT TRANSFORMER:'WESTERN ELECTRIC/ PAT IN USA 9 9 24 3 24 25/ PAT APPLIED FOR/ MADE IN USA/ SIMILAR ENGRAVINGS FOR BOTH SIDES OF THE OUTPUT TRANSFORMER/TOP INPUT TRANSFORMER:'227A/ INPUT/ TRANS'/ TOP OF OUTPUT TRANSFORMER:'117A/ OUTPUT TRANS/ VACUUM TUBE BOTTOM:'NORTHERN ELECTRIC/ MADE IN CANADA/ R205D
Missing: CABINET/ OUTPUT TERMINALS
Finish: WOOD PAINTED BLACK
Decoration: TERMINALS ON THE FRONT PANEL LABELLED IN RED: 'IN' & 'OUT'/ 3 BATTERY VOLTAGES ARE INDICATED IN RED NEXT TO EACH TYPE ON REAR PANEL

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

Bell Telephone Co. of Canada, Amplifier, circa 1926–1929, Artifact no. 1975.0505, Ingenium – Canada’s Museums of Science and Innovation, http://collection.ingeniumcanada.org/en/id/1975.0505.001/

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