Model: Automobile Radio
Antique radios, Old Time Radios
Automobile Radio
Country:
United States of America (USA)
Manufacturer/Brand:
Scott Radio Labs.
Year: 1930
Type:
Car RadioAutoradio - ist nicht immer als solches bezeichnet, da erst später mit Code unterschieden.
Mod.-ID = 55382
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Schematics etc.: 0 (for
members)
Principle
Super-Heterodyne (Super in general)Superhet - normally without a preamplification stage (as far as known). Please use «To add informations to model» if you know more! Thanks.
Récepteur TSF superhétérodyne. Normalement sans préamplification de HF.
Superhet ohne Vorstufe.
Nicht immer war bei der Erfassung klar, ob der Empfänger eine Vorstufe aufweist oder nicht. Im Zweifelsfall kam das Gerät in diese Kategorie.
Wave bands
Broadcast only (MW).Mittelwellenempfänger
Power type and voltage
Storage Battery for filament
Loudspeaker/pwr.out
Magnet Dyn.(moving coil) - electro or permanent magn (?).Dynamic loudspeaker (Rice-Kellog-System). Either permanent- or electro-dynamic. Haut-parleur electrodynamique à aiment permanent OU avec bobine d`excitation - plus souvent aussi utilisé pour le self.
Permanentdynamischer ODER elektrodyn. Lautsprecher, also Tauchspulenprinzip statt z.B. «Magnetlautsprecher». Bei der Erfassung war nicht erkennbar ob selbsterregtes (permanentdyn.) oder fremderregtes Feld.
www.radiomuseum.org
Model: Automobile Radio
Material
Metal caseMetal case.
Caisse en métal.
Gerät, dessen Gehäuse aus Metall gefertigt ist. Es kann sich um verschiedenartige Metalle und Oberflächenbearbeitungen handeln. Ist es hingegen nur ein Chassis, so erhält das Gerät eine andere Bezeichnung.
Shape
Chassis only or for «building in»
Valves / Tubes
7:
224Siehe auch 224_Rectifier
(more
for members)
Notes
in Citizen Radio Callbook, Sept.1930;
External source of data
Ernst Erb
Source of data
Radio Collector`sGuide 1921-Radio Collector`sGuide 1921-; McMahon, Morgan E.; Vintage Radio, CA90274, USA. (1981)
Mentioned in
E.H.Scott Radio Coll; Clark 1998E.H. Scott Radio Collectors Guide 1925-1946, Jim Clark, Jim Clark Enterprises, USA
Scan of only known magazine article
Further information on
Automobile Radio (Scott Radio Labs.)
The only reference to auto radios is found in the September, 1930 issue of the Citizen’s Radio Callbook. In a single page article entitled “Superheterodyne Circuit Adapted for Automobile Radio Receiver”, Scott described his automobile radio.
The set is battery operated, obtaining ‘A’ voltage from the ignition battery, and ‘B’ cells in the back. The antenna could be either a copper mesh in the ceiling or a wire hidden in the running board. A small schematic is given, showing the following tubes: two type 27 tubes in the oscillator and second detector, three type 24 tubes for the first detector and two IF stages, a 71A as the first audio stage and a 45 as the final audio. Even using these seven tubes, Scott claimed the set only drew 25mA from the ‘B’ cells. The article leads one to believe that several sets might have been built. The last paragraph states that “later models of the receiver show change in that a 227 tube is used for the first audio, and a 171A for the output instead of the combination shown in the diagram”. The article also mentions that a special water and dust proof Utah magnetic speaker is used with the set.
