Renseignements généraux

Nº de série

S/O

Nº de partie

1

Nombre total de parties

3

Ou

S/O

Brevets

S/O

Description générale

sheet steel case, chassis and internal shielding/ metal, synthetic and glass working parts/ synthetic knobs and parts/ fabric covered power cord Bakelite knobs

Dimensions

Remarque : Cette information reflète la taille générale pour l’entreposage et ne représente pas nécessairement les véritables dimensions de l’objet.

Longueur

25,4 cm

Largeur

26,5 cm

Hauteur

18,6 cm

Épaisseur

S/O

Poids

S/O

Diamètre

S/O

Volume

S/O

Lexique

Groupe

Communications

Catégorie

Radio

Sous-catégorie

S/O

Fabricant

Ou

National

Pays

United States of America

État/province

Massachusetts

Ville

Malden

Contexte

Pays

Canada

État/province

Nouvelle-Écosse

Période

+/- 1940 +

Canada

An American made radio receiver used by a member of a Canadian amateur radio club, Arron D. Solomon, VE1OC. Mr. Solomon began his radio career as a SWL in 1931. Licensed as VE1OC in 1938, he received his advanced certificates in 1938. A life member of ARRL [American Radio Relay League] and RAC [Radio Amateurs of Canada], he had confirmed contacts with 333 countries at the time of his passing. Arron was also an antique radio collector and was a member of the Antique Wireless Association and several other antique radio associations. His extensive collection of antique radios is now on display at the Hammond Radio Museum in Guelph, Ontario. Mr Solomon graduated from Dalhuosie University with a B.A.,B.Sc and Diploma in Engineering and was a member of the Engineering Institute of Canada. In 1941 He joined the RCAF as a Flying Officer and served with the RAF, UK Radar Chain 1941-1942 and RCAF Radar Signals, Radar Officer 1942-1944 on the west coast. He passed away January 29, 2002 at age 82. [Written by Dave McClafferty, VE1ADH for Dartmouth Amateur Radio Club]

Fonction

A device used to receive radio amateur CW (Continuous Wave - Morse) and AM (Amplitude Modulated) radio signals.

Technique

An example of a regenerative shortwave radio receiver. The regenerative process, designed into this receiver was a major development that moved radio from insensitive crystal detectors to highly sensitive vacuum tube receivers. Developed in 1914, regenerative receivers were used into the mid forties. National Company was formed in 1914 as the National Toy Company and became the National Company by 1916 as it broadened its product line. In the 1920's the firm began manufacturing broadcast and shortwave radio receivers, including the SW-2, SW-4 and the SW-5. In the 1930's during the depression, a lower-cost version of National's regenerative SW-5 was developed, the SW-3. The push-pull audio output stage of the SW-5 was eliminated - which meant headphone operation only - and a wrap-around sheet metal cabinet was substituted to further reduce costs. Both AC and battery powered models of the SW-3 were marketed and two upgrades made; the last right after WWII to use octal tubes. This receiver was in production almost 15 years, from 1933 to 1948.

Notes sur la région

Inconnu

Détails

Marques

logo on front reads 'NC'/ plate on transformer inside reads 'NATIONAL/ AUDIO/ TRANSFORMER/ TYPE S-101/ NATIONAL CO., INC.,/ MALDEN, MASS. U.S.A.'/

Manque

plated cap detached from casing front [stored with receiver]

Fini

black wrinkle finish on casing exterior/ glossy black painted interior and underside/ black synthetic controls and dial casing/ metallic, black painted and metallic parts/ colourless and transparent and silvered glass/ brown wire covering

Décoration

S/O