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NF-Verstärker NV-4

NF-Verstärker NV-4; Stahlwerk Mark AG; (ID = 805908) Ampl/Mixer NF-Verstärker NV-4; Stahlwerk Mark AG; (ID = 805907) Ampl/Mixer
NF-Verstärker NV-4; Stahlwerk Mark AG; (ID = 2464) Ampl/Mixer
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NF-Verstärker NV-4; Stahlwerk Mark AG; (ID = 805908) Ampl/Mixer
Stahlwerk Mark AG;: NF-Verstärker NV-4 [Ampl/Mixer] ID = 805908 640x480
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For model NF-Verstärker NV-4, Stahlwerk Mark AG; Berlin-Breslau
Country:  Germany
Manufacturer / Brand:  Stahlwerk Mark AG; Berlin-Breslau
Year: 1924/1925 Category: Audio Amplifier or -mixer
Valves / Tubes 4:
Main principle Audio-Amplification; 4 AF stage(s)
Wave bands - without
Power type and voltage Storage and/or dry batteries
Loudspeaker - This model requires external speaker(s).
Power out
from Model: NF-Verstärker NV-4 - Stahlwerk Mark AG; Berlin-
Material Wooden case, TUBES VISIBLE.
Shape Tablemodel, slant panel.
Dimensions (WHD) 200 x 130 x 145 mm / 7.9 x 5.1 x 5.7 inch
Notes Gerät mit Transformatorkopplung RTV-Stempel vom 23.02.1924
Net weight (2.2 lb = 1 kg) 1.850 kg / 4 lb 1.2 oz (4.075 lb)
External source of data E. Erb 3-907007-36-0
Source of data - - Data from my own collection / Radiokatalog Band 2, Ernst Erb
Circuit diagram reference Info Dr. H. Börner without schematic
Picture reference Das Modell ist im «Radiokatalog» (Erb) abgebildet.

All listed radios etc. from Stahlwerk Mark AG; Berlin-Breslau
Here you find 16 models, 4 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.