• Country
• Germany

• Manufacturer / Brand
• Koch & Sterzel AG; Dresden

• Year
• 1929/1930

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 15438

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

• Number of Tubes
• 3

• Valves / Tubes
• RENZ2104 or NZ4200 L415D G490 or G460

• Conflicting model year with tube data.
• The model date contradicts tube dates. [ NZ4200 (1930) G460 (1930)]

• Main principle
• TRF with regeneration; 2 AF stage(s)

• Tuned circuits
• 1 AM circuit(s)

• Power type and voltage
• Alternating Current supply (AC) / 110-150; 210-250 Volt

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

• Material
• Metal case

• from Radiomuseum.org
• Model: Hermes ER355 - Koch & Sterzel AG; Dresden

• Shape
• Tablemodel, low profile (big size).

• Dimensions (WHD)
• 370 x 210 x 180 mm / 14.6 x 8.3 x 7.1 inch

• Notes
• 2 Mod.

• Net weight (2.2 lb = 1 kg)
• 5.5 kg / 12 lb 1.8 oz (12.115 lb)

• Price in first year of sale
• 219.00 RM !

• External source of data
• E. Erb 3-907007-36-0

• Source of data
• Radiokatalog Band 2, Ernst Erb

• Mentioned in
• Der Radio-Händler / Der Rundfunk-Händler (ab Jan. 1939) (2920)

• Picture reference
• Das Gerät ist im Doppelband "Historische Radios" von Günther Abele abgebildet.

• Other Models

• Here you find 75 models, 49 with images and 25 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Koch & Sterzel AG; Dresden