• Country
• Austria

• Manufacturer / Brand
• Zerdik; Wien

• Year
• 1932 ?

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 121964

• Number of Tubes
• 3

• Valves / Tubes
• E445 E443H 506

• Conflicting model year with tube data.
• The model date contradicts tube dates. [ E443H (1933)]

• Main principle
• TRF with regeneration

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Alternating Current supply (AC) / 110-240 Volt

• Loudspeaker
• Electro Magnetic Dynamic LS (moving-coil with field excitation coil) / Ø 21 cm = 8.3 inch

• Material
• Wooden case

• from Radiomuseum.org
• Model: RW21 - Zerdik; Wien

• Shape
• Tablemodel, high profile (upright - NOT Cathedral nor decorative).

• Dimensions (WHD)
• 304 x 393 x 190 mm / 12 x 15.5 x 7.5 inch

• Notes
• Maße mit Füße, ohne Knöpfe.
  Habe das Radio in meiner Sammlung! Ist in einem bestechenden Zustand! Optisch gleich mit Type RW22, jedoch unterhalb des Senderwahlknopfes ist kein Umschalter!

• Net weight (2.2 lb = 1 kg)
• 8 kg / 17 lb 9.9 oz (17.621 lb)

• Source of data
• - - Data from my own collection

• Author
• Model page created by Alois Steiner. See "Data change" for further contributors.

• Other Models

• Here you find 166 models, 115 with images and 76 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Zerdik; Wien