• Country
• United States of America (USA)

• Manufacturer / Brand
• Grebe, A.H. & Co.; Richmond Hill (NY)

• Year
• 1920

• Category
• Audio Amplifier or -mixer

• Radiomuseum.org ID
• 214012

• • Brand: Synchrophase

• Number of Tubes
• 2

• Valves / Tubes
• VT-Class-II or A_Moorhead VT-Class-II or A_Moorhead

• Main principle
• Audio-Amplification; 2 AF stage(s)

• Wave bands
• - without

• Power type and voltage
• Storage and/or dry batteries

• Loudspeaker
• - This model requires external speaker(s).

• Material
• Wooden case

• from Radiomuseum.org
• Model: RORK Type 1 [External Rheostat Elements] - Grebe, A.H. & Co.; Richmond

• Shape
• Tablemodel, Box - most often with Lid (NOT slant panel).

• Dimensions (WHD)
• 8 x 7 x 7.5 inch / 203 x 178 x 191 mm

• Notes
• Grebe Type I Two-Stage Audio Amplifier Type RORK with external rheostat elements with knob control.

• Author
• Model page created by Alan Larsen. See "Data change" for further contributors.

• Other Models

• Here you find 188 models, 124 with images and 60 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Grebe, A.H. & Co.; Richmond Hill (NY)