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

CITE THIS OBJECT

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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