Amplifier

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OBJECT TYPE
distributed
DATE
1956
ARTIFACT NUMBER
2018.0233.001
MANUFACTURER
SPENCER-KENNEDY LABORATORIES
MODEL
SKL 212
LOCATION
Cambridge, Massachusetts, United States of America

More Information


General Information

Serial #
N/A
Part Number
1
Total Parts
1
AKA
Distributed amplifier
Patents
N/A
General Description
A metal object made with metal and synthetic elements/Un objet fait avec du matériel en métal et synthétique.

Dimensions

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

Length
30.5 cm
Width
43.0 cm
Height
12.0 cm
Thickness
N/A
Weight
N/A
Diameter
N/A
Volume
N/A

Lexicon

Group
Communications
Category
Television
Sub-Category
N/A

Manufacturer

AKA
SPENCER KENNEDY
Country
United States of America
State/Province
Massachusetts
City
Cambridge

Context

Country
Canada
State/Province
Ontario
Period
Unknown
Canada
This artifact represents the development of one of Canada’s earliest commercial cable television systems because of Edwin R. Jarmain. In 1952, he successfully established an experimental cable operation in London, Ontario. He increased reliable access to over-the-air television by erecting a large rhombic antenna, and then transmitting—via cable. The rhombic antenna could pull down a stronger signal and provide a much more reliable television service. By 1974, service had expanded to 100,000 homes in Ontario, prompting Jarmain and his sons to go public as Canadian Cablesystems Inc. The company was bought out by Rogers Communications in 1979. In 2011, Jarmain was inducted into Canada's Telecommunications Hall of Fame as “the acknowledged father and pioneer of cable television in Canada.” L’objet représente le développement d’un des plus jeunes systèmes de télévision a câble au Canada grâce Edwin R. Jarmain. En 1952 il a établi un système prototype d'opération de câble à London, Ontario. Il a augmenté l’accès à la télévision en directe en construisant une antenne rhombique et en transmissent via câble. L'antenne pouvait tirer un signal plus fiable qui était plus fort et favorable pour les services de télévision. En 1974 le service a grossi à 100,000 maisons et Jarmain a pris la décision d'aller public avec le nom Canadian Cablesystems Inc. La compagnie a été achetée par Rogers Communications en 1979. EN 2011 Jarmain a été intronisée au Temple de la Renommée pour les Télécommunications du Canada et a été reconnu comme le père et pionnier de la télévision a câble au Canada.
Function
This artifact is used to amplify a television signal along a main cable distribution line. It does this by accepting a signal through an input and then outputs the same signal at a higher amplitude in order to adjust for a loss of amplitude as the signal passes along a distribution line. L'objet est utilisé pour amplifier les signaux de télévision sur une ligne de distribution a câble. L'objet accompli cette tâche en acceptant un signal à sa porte d'entrée et en augmentant l'amplitude du même signal à sa sortie. Ceci fait en sorte que l'objet peut compenser pour la perte d'amplitude du signal pendant qu'il voyage le long de la ligne de distribution a câble.
Technical
The SKL 212 is recognized as one of the first distributed amplifiers developed specifically for cable TV. It was eventually replaced with solid-state amplifiers that were more reliable than tube-based amplifiers, particularly in inclement weather conditions. Le SKL 212 est connu comme un des tout premier amplificateurs distributeurs qui était développée pour la télévision a câble. Il a fini par être remplacé par des amplificateurs a semi-conducteurs qui était plus fiable que les amplificateurs à tuyau. Les amplificateurs à tuyau avaient une tendance à diminuer leur performance pendant des températures moins favorables et donc le changement c'est fait pour un amplificateur semi-conducteur.
Area Notes
Unknown

Details

Markings
On the front of the object/Sur le devant de l'objet: "SKL/ SPENCER-KENNEDY/ LABORATORIES INC/ CAMERIDGE MASS USA".
Missing
None apparent/L'objet a toutes ces pièces.
Finish
A rectangular silver coloured metal box with a black synthetic cable coming out of its back. The front face of the artifact has two other black synthetic cables that have metal attachments on their ends. A metal switch along with a power light and a metal manufacturing plate are also visible along on its front. Un objet rectangulaire de couleur argent qui est fait avec du matériel en métal de couleur argent. Un câble d'alimentation noire qui est synthétique sort de son dos. Le devant de l'objet a deux autres câbles synthétiques de la même couleur avec des accessoires en métal sur leur bout. Un interrupteur en métal et une lumière pour signaliser l'alimentation est aussi visible sur le devant et sont accompagnés d'une plaque du fabricateur.
Decoration
N/A

CITE THIS OBJECT

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

SPENCER-KENNEDY LABORATORIES, Amplifier, circa 1956, Artifact no. 2018.0233, Ingenium – Canada’s Museums of Science and Innovation, http://collection.ingeniumcanada.org/en/id/2018.0233.001/

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