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Aldebaran

Aldebaran ; Marelli Radiomarelli (ID = 61673) Radio
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Aldebaran ; Marelli Radiomarelli (ID = 150643) Radio
Marelli Radiomarelli: Aldebaran [Radio] ID = 150643 881x687
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For model Aldebaran, Marelli (Radiomarelli); Sesto San Giovanni (MI):
scala parlante non originale
 
Country:  Italy
Manufacturer / Brand:  Marelli (Radiomarelli); Sesto San Giovanni (MI)
Year: 1938/1939 Category: Broadcast Receiver - or past WW2 Tuner
Valves / Tubes 7: 6A8 6K7 6H6 6J7 6G5 6L6 5X4
Main principle Super-Heterodyne (Super in general); ZF/IF 450 kHz
Wave bands Broadcast, Long Wave and 2 x Short Wave.
Details
Power type and voltage Alternating Current supply (AC) / 100-240 Volt
Loudspeaker Electro Magnetic Dynamic LS (moving-coil with field excitation coil)
Power out 5.5 W (unknown quality)
from Radiomuseum.org Model: Aldebaran - Marelli Radiomarelli; Sesto
Material Wooden case
Shape Tablemodel, with any shape - general.
Notes Occhio magico: 6G5.
Meter: 6G5.
Price in first year of sale 1,900.00 ITL
Collectors' prices  
Source of data Guida Pratica Antique Radio (1) 1999
Literature/Schematics (1) Il Radio Libro, (Ravalico) 5.Edizione 1939

Model page created by Alessandro De Poi. See "Data change" for further contributors.



All listed radios etc. from Marelli (Radiomarelli); Sesto San Giovanni (MI)
Here you find 425 models, 316 with images and 244 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.



 


Forum contributions about this model
Marelli Radiomarelli: Aldebaran
Threads: 2 | Posts: 6
Hits: 2452     Replies: 0
marelli: ; Aldebaran
Antonio Maida
18.Dec.08
  1

Il ricevitore Aldebaran nella versione soprammobile montava come finale una 6V6 e come raddrizzatrice una 5Y3. Nella versione radiofonografo la potenza d'uscita passa da 3 watt a 5,5 con la sostituzione della finale con una 6L6 e la raddrizzatrice con la 5X4. Anche l'altoparlante viene sostituito con uno di dimensioni maggiori.

 
Hits: 2763     Replies: 4
marelli: ; Aldebaran
Robert Sarbell
25.Nov.06
  1 Dear esteemed colleagues,

On the present ebaY Italia, (see item # 320051336584), there is a model 1938 Marelli Aldebaran which has one photo depicting the output tube as 6V6 and the rectifier as 5Y3.

Is it possible there may have been a chassis revision to the model. I  attach a copy of the digital photo from the rear of the chassis. The label appears to be an original part of the radio which identifies the tube layout.

Respectfully,
Robert

Attachments

Omer Suleimanagich
25.Nov.06
  2

Robert,

 

If you look at the pictures from RMorg, where the radio is located, the radio has a 5Y3 and a 6V6.

The question is, howcome Italian radios of this period used American vacuum tubes instead of German?

Martin Bösch
25.Nov.06
  3 Hello,
I apologize, I do not exactly know about Italy, but in those years, it was not uncommon that Swiss sets used imported US tubes, maybe, a few of these tubes were imported to Italy.
Maybe, one of our Italian members can help with this topic
Sincerely Martin
Alessandro De Poi
26.Nov.06
  4 No surprise if American tubes were used in Italy.
Radiomarelli (one of the main makers) started its production with radios based on American Bosch' sets. Also the corporate symbols is very similar, and the motto as well (The best in radio for American Bosch, Il meglio in radio for Radiomarelli). The main tube factory, FIVRE, was a Marelli's branch.
Other Italian makers have started radio production in the same way. To name a few more examples:
  • CGE, an electomechanics firm related with Thomson-Houston (and therefore General Electric), started his radio industry by selling RCA's sets
  • Capriotti-Kennedy used to sell radio which were very similar to Grigsby Grunow/Majestic ones (but with a smaller number of tubes, probably because of radio taxes)
Italian companies used both German (German commercial banks played a very important role in developing Italian manufacture) and American patents in electromechanics; in the radio industry American patents and components were widely spread. Also, several foreign corporations had dealers (like Stromberg Carlson or Magnavox) or plants in Italy, in which their technology were used.
Several Italian radio companies used American components at the beginning (of course, also German tubes were used, and not only by German enterprises with plants in Italy).
Also driven by the autarky and by the political spur to spread the radio, the domestic production grew quickly - still relying on American tubes for a while.
Robert Sarbell
25.Nov.06
  5 Dear Omer and Martin,

The answer to the US tubes is because RCA and M-M had an agreement in the early to mid- 1930s, in which Marelli would produce some octal tubes. There were other countries, as Martin states, which used the octal tubes. The 1939 Swiss Biennophone 593 that I enjoy (and I might also add still has nearly every original component (except the PS elkos), also used the US octal tubes.

I believe our esteemed members from Italy must certainly have the background data to explain the anomaly.

I must not have observed closely enough,  Omer, to be able to determine the difference between a 6V6 and a 6L6 - both tubes were produced in the metal cylinder and the glass envelope. I could not read any markings on any of the tubes.

The difference between a 5X4 and the 5Y3 is more difficult - my RCA tube manual does not list a tube for the 5Y3 designation.

The 5Y3G and 5Y3GT were first produced by Sylvania in a Medium Octal 5-pin in the ST14 envelope (5Y3G); and then in the Intermediate Octal 5-pin in the cylindrical-shaped T9 envelope (5Y3GT). It is quite possible that Sylvania licensed Marelli and other European makers to produce as many tubes as needed to satisfy their market requirements .
 
The point I was trying to make is that the RMorg database for the 1938/39 Morelli Aldebaran model does not agree with what appears to be an authentic tube layout in photo. It is remotely conceivable the seller or someone else may have produced a small label to paste to a pre-War radio to enhance its value. . . . .I seriously doubt that.

If a member wishes to submit the item to our administrators, it may help to resolve the  ambiguity.

Respectfully,
Robert




 
Marelli Radiomarelli: Aldebaran
End of forum contributions about this model

  
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