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R 3

R 3 ; De Forest DeForest (ID = 324523) Radio
R 3 ; De Forest DeForest (ID = 324524) Radio R 3 ; De Forest DeForest (ID = 324526) Radio
R 3 ; De Forest DeForest (ID = 1400550) Radio R 3 ; De Forest DeForest (ID = 1400554) Radio
R 3 ; De Forest DeForest (ID = 1400555) Radio
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R 3 ; De Forest DeForest (ID = 324524) Radio
De Forest DeForest: R 3 [Radio] ID = 324524 933x435
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For model R 3, De Forest (DeForest) Crosley Radio, Consolidated Industries; Toronto:
Both tuner knobs are currently lost.
 
Country:  Canada
Manufacturer / Brand:  De Forest (DeForest) Crosley Radio, Consolidated Industries; Toronto
Year: 1925 Category: Broadcast Receiver - or past WW2 Tuner
Valves / Tubes 3: UX201A UX201A UX201A or UX112
Main principle TRF with regeneration; Reflex
Tuned circuits 2 AM circuit(s)
Wave bands Broadcast only (MW).
Details
Power type and voltage Storage and/or dry batteries
Loudspeaker - This model requires external speaker(s).
Power out
from Radiomuseum.org Model: R 3 - De Forest DeForest Crosley
Material Wooden case
Shape Tablemodel, Box - most often with Lid (NOT slant panel).
Notes Rich two-tone Adam Brown Mahogany Cabinet.
Reduced variant of Crosley Trirdyn (only single filament control, no phone jack, no separate on/off switch).
Collectors' prices  
Source of data Radio Manufacturers of the 1920s, Vol 1

Model page created by Reinhard Peyerl. See "Data change" for further contributors.



All listed radios etc. from De Forest (DeForest) Crosley Radio, Consolidated Industries; Toronto
Here you find 250 models, 105 with images and 169 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.



 


Forum contributions about this model
De Forest DeForest: R 3
Threads: 1 | Posts: 2
Hits: 1885     Replies: 1
deforest: R 3 (R3)
Felix Corrochano
01.Jun.07
  1 Hello,
    I have just bought from an eBay auction a radio which seems to be a R 3 from De Forest - Crosley. There was not  case, only the chassis. It is in fair condition, all components inside, transformers OK... I have drawn the schematic, is a reflex with regeneration like Trirdyne, or 3R3 from Crosley. The sockets are mounted on a hard rubber board which is marked  "R 3  1906"  .  Last number seems to be a year but it could not, at 1906 there are not this kind of receivers.. I am enclosing some photos.

    Regards.
    Félix.

Attachments

Konrad Birkner † 12.08.2014
02.Jun.07
  2

DeForest-Crosley R-Series were introduced in 1925. The Chassis of Your radio looks similar to the (US) Crosley Trirdyn 3R3 here. Only the front panel elements are rearranged. There is only a single filament rheostat, and the reaction control moved to the place of the former 2nd rheostat..

In particular Crosley did such rearrangements to create "new" models, which really inside used the existing chassis structure. Rationalization was it.

The schematic given for Trirdyn may slightly differ. Anyway there is a mystery for me:

Crosley praised in advertisments the Reflex circuit, which shall do the job of 5 tubes, but employed only 3. this is achieved by double use of two tubes. So far, so good. 
But as I can see there is only the first tube in double duty. The second one is an audion  with reaction, feeding the AF back to the first tube. The first one now drives the output tube.
The signal flow is  1 - 2 - 1 - 3. Is the schematic in error?  Do I need new spectacles? I don't think so, since my own Super Trirdyn Regular has the same arrangement.

The (rather poor) schematic in Riders 1-16 notes
for the 1st tube 1.RF&AF,
for the 2nd tube DET, and
for the 3rd tube 2.AF....... makes only 4 stages by 3 tubes.

Why did Crosley pretend to employ 5 stages ? Swindling ?

 
De Forest DeForest: R 3
End of forum contributions about this model

  
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