- Country
- United States of America (USA)
- Manufacturer / Brand
- Grebe, A.H. & Co.; Richmond Hill (NY)
- Year
- 1919
- Category
- Audio Amplifier or -mixer
- Radiomuseum.org ID
- 43549
-
- Brand: Synchrophase
Click on the schematic thumbnail to request the schematic as a free document.
- 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 / 4 & 20 & 40 Volt
- Loudspeaker
- - This model requires external speaker(s).
- Material
- Wooden case
- from Radiomuseum.org
- Model: RORB - Grebe, A.H. & Co.; Richmond
- Shape
- Tablemodel, Box - most often with Lid (NOT slant panel).
- Notes
- Grebe Type RORB 2-Stage Amplifier
- Price in first year of sale
- 45.00 $
- External source of data
- Ernst Erb
- Source of data
- Radio Collector`s Guide 1921-1932
- Circuit diagram reference
- Rider's Perpetual, Volume 1 = 1931/1934 (for 1919-1931)
- Mentioned in
- Radio Manufacturers of the 1920s, Vol 1
- Literature/Schematics (4)
- October 1919 QST magazine page 37
- 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)