• Year
  • 1921
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 43520
    • Brand: Synchrophase

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

 Technical Specifications

  • Number of Tubes
  • 3
  • Main principle
  • TRF with regeneration
  • Wave bands
  • Broadcast (MW) and Long Wave.
  • Power type and voltage
  • Storage and/or dry batteries
  • Loudspeaker
  • - For headphones or amp.
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: CR9 - Grebe, A.H. & Co.; Richmond
  • Shape
  • Tablemodel, Box - most often with Lid (NOT slant panel).
  • Dimensions (WHD)
  • 22.2 x 7.25 x 8.5 mm / 0.9 x 0.3 x 0.3 inch
  • Notes
  • Tuning capacitor 40 - 510 pF;
    plate coupling coil 165 µH;
    tuning coil taps:
    80 - 185 - 440 - 880 - 1610 - 2500 - 3800 - 5000 - 6780 - 8200 µH.
    In 1923 other tubes were recommended: C300 C301A C301A for storage battery or 3xC299 for dry battery operation (Andrae catalog).

  • Price in first year of sale
  • 130.00 $
  • External source of data
  • Ernst Erb
  • Circuit diagram reference
  • Rider's Perpetual, Volume 1 = 1931/1934 (for 1919-1931)

 Collections | Museums | Literature

Collections

The model CR9 is part of the collections of the following members.

Museums

The model CR9 can be seen in the following museums.

 Forum

Forum contributions about this model: Grebe, A.H. & Co.;: CR9

Threads: 2 | Posts: 6

I am restoring a Grebe CR-9. Does the unit require an external detector and amp to operate? I tried to connect the filament voltage and detecter / amp voltages to the terminals but i am not getting anything from the speaker. In fact the tubes are not even powered.

Have anyone successful fired up a Grebe CR-9?

Dino DiBernardo, 03.Jan.14

Weitere Posts (5) zu diesem Thema.

Baujahr: ab Aug.1921 (Douglas: Radio Manuf.of the 20s); Maße: 570 / 180 / 220 ; Röhren: UV200 or 201 / UV201 / UV201 , kurze Bauart ! (sonst sitzt der Deckel auf den "Spitzli"auf!); 

Konrad Birkner † 12.08.2014, 04.Mar.04

Weitere Posts (1) zu diesem Thema.