Marconi Six (6) 296 Ch= 633W 2me série

Marconi (marque), Cie. Fse. du Gramophone; Paris

Data
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  • Year
  • 1934/1935
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 124408

Click on the schematic thumbnail to request the schematic as a free document.

 Technical Specifications

  • Number of Tubes
  • 6
  • Number of Transistors
  • Main principle
  • Superhet with RF-stage; ZF/IF 128 kHz; 2 AF stage(s)
  • Wave bands
  • Broadcast (MW) and Long Wave.
  • Power type and voltage
  • Alternating Current supply (AC) / 90; 110; 130; 150; 220; 250 Volt
  • Loudspeaker
  • Electro Magnetic Dynamic LS (moving-coil with field excitation coil) / Ø 21 cm = 8.3 inch
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: Marconi Six 296 Ch= 633W [2me série] - Marconi marque, Cie. Fse. du
  • Shape
  • Tablemodel, high profile (upright - NOT Cathedral nor decorative).
  • Dimensions (WHD)
  • 410 x 480 x 265 mm / 16.1 x 18.9 x 10.4 inch
  • Notes

  • 2 gammes d'ondes : PO de 200 à 570 m, et GO de 900 à 2000 m. Détection par élément Westector (oxyde du cuivre).

    Ébénisterie en noyer et macassar, rétrécissant vers le haut.

    Châssis similaire au Pathé 64 (schéma). Voir aussi modèle Marconi Six (1re série, type 295).

    À noter : différentes types de châssis sont connus (appellés "modèle" sur la plaque du type), ex. 633W, 633W1, 633W15) - avec des différences inconnues. Reste à determiner.

  • Net weight (2.2 lb = 1 kg)
  • 17 kg / 37 lb 7.1 oz (37.445 lb)
  • Price in first year of sale
  • 1,750.00 FRF
  • Mentioned in
  • -- Original prospect or advert (Cherbourg-Éclair, 28.02.1935)
  • Literature/Schematics (1)
  • -- Original prospect or advert (L'Est Républicain, 28.04.1934)
  • Literature/Schematics (2)
  • La Nature, 1934 2ème, p.281
  • Author
  • Model page created by Michael John. See "Data change" for further contributors.

 Collections | Museums | Literature

Collections

The model Marconi Six (6) is part of the collections of the following members.

 Forum

Forum contributions about this model: Marconi marque, Cie.: Marconi Six 296 Ch= 633W

Threads: 1 | Posts: 9

Hello everyone,

I am currently working on the restoration of a G.E. Marconi model 633W15 Type 296, and I found some differences with the schematics that is in the model information in RadioMuseum.


As you can see in the diagram, the values ​​of R8 and R9 are not printed, and I could not find any reference on the Internet to know the original values. But what can be known in the diagram are the values ​​of V-voltages across radio, so by doing tests I have come to the conclusion that the appropriate values ​​for both R8 and R9 are: 68K Ohms. At least with those values ​​I have achieved the correct values ​​for V.


Another difference I have found is: in schematics CV4 appears inside IF1 and CV6 inside IF2, but when looking inside IF1 and IF2 there is physically neither CV4 nor CV6, therefore the primary of the IF transformers can not be adjusted. I think that both CV4 and CV6 were not factory installed because I seems that I am the first one opening the IF cans.


Another difference found in the schematics is that the denomination of the adjustable capacitor that is located in parallel with the D contacts of the bands switch is not printed: this adjustable capacitor must be labeled C5. This C5 is only active in LW-GO-OL.


Other difference found is that in the schematics a connection is missing: the upper contact of D switch must be connected to the junction point between L7 and L8. It has been physically verified on the radio that this connection exists but it is not marked in schematics.

I hope this information is useful.

Regards,

Vicente Moncholi - Seville - Spain

 

 

Vicente Moncholi-Cebrian, 15.Apr.18

Weitere Posts (9) zu diesem Thema.