The Großer Klappenschrank could be assembled with an Untersatz C to set up an SB switchboard exchange. All Feldfernsprecher 33 (FF33) field telephones connected to Untersatz C would have to be equipped with an SB Zusatz 33 handset cradle to allow the OB phones to operate on the SB exchange.
Untersatz C
Unlike the Untersatz A that uses signal flaps actuated by magneto current, the Untersatz C uses Sternschauzeichen actuated by each SB Zusatz to indicate when the calls have ended.
Closeup showing the Sternschauzeichen on the front panel.
Sternschauzeichen
Sternschauzeichen interior mechanism
The Sternschauzeichen is an electo-mechanical device with electromagnetic coils (spulen) that rotate a shaft when the coils are energized. On the end of the shaft is a star-shaped vane. The paddles of the vane are brightly colored and they show though a star-shaped window on the Sternschauzeichen. When the coils are de-energized, a spring rotates the shaft in the opposite direction and the window shows black.
Referring to the above electrical schematic… When a call is in progress, the FF33 handsets are off the cradles, and switches U on both SB Zusatz 33s are open. When the call is completed, and the caller on Line 1 (Teilnemer 1) puts the handset back in the cradle, switch U on the associated SB Zusatz closes. This causes 12 volts direct current from the Kontrol Batterie (KB) to flow from the Untersatz C, through the SB Zusatz, and back to the Untersatz C. When this happens, the Sternschauzeichen (SZ1) coils are activated and the star vane rotates, indicating to the operator that the call has ended.
Two Untersatzen C are put together on one stand on the right. On the left, an Untersatz C and Untersatz B are on one stand.
Check out my blog about WW2 German field telephone equipment... https://rotwangm.wordpress.com/untersat ... -exchange/
Untersatz C and the SB Exchange
Discussions on the equipment used by the Axis forces, apart from the things covered in the other sections. Hosted by Juha Tompuri
Post Reply
1 post
• Page 1 of 1
Jump to
- Axis History
- ↳ Life in the Third Reich & Weimar Republic
- ↳ Propaganda, Culture & Architecture
- ↳ Music of the Reich
- ↳ Women in the Reich
- ↳ Heer, Waffen-SS & Fallschirmjäger
- ↳ Model building
- ↳ U-Boats
- ↳ Kriegsmarine surface ships and Kriegsmarine in general
- ↳ Luftwaffe air units and Luftwaffe in general
- ↳ Model building
- ↳ Legion Condor
- ↳ German Strategy & General German Military Discussion
- ↳ NSDAP, other party organizations & Government
- ↳ The Phil Nix SS & Polizei section
- ↳ The Dieter Zinke Axis Biographical Research Section
- ↳ Japan at War 1895-1945
- ↳ Italy under Fascism 1922-1945
- ↳ Minor Axis Nations
- ↳ Finland
- ↳ Foreign Volunteers & Collaboration
- ↳ Holocaust & 20th Century War Crimes
- Axis Equipment
- ↳ Aircraft
- ↳ Fortifications, Artillery, & Rockets
- ↳ Model building
- ↳ The Ron Klages Panzer & other vehicles Section
- ↳ Model building
- ↳ Panzer & other vehicles - Photo threads
- ↳ Model building
- ↳ Small Arms
- ↳ Other Equipment
- Militaria & Collecting
- ↳ Axis Awards
- ↳ Militaria for sale
- ↳ Axis Documents, Feldpost numbers, Postcards & Other Paper Items
- ↳ Militaria for sale
- ↳ Axis Uniforms, Headgear & Insignia
- ↳ Militaria for sale
- ↳ Other WW1 & WW2 Militaria
- ↳ Militaria for sale
- ↳ For Sale & Wanted
- ↳ Reproductions Sales
- The Allies & the Neutral States
- ↳ China at War 1895-1949
- ↳ France 1919-1945
- ↳ Poland 1919-1945
- ↳ The Soviet Union at War 1917-1945
- ↳ The United Kingdom & its Empire and Commonwealth 1919-45
- ↳ USA 1919-1945
- ↳ The Allies and the Neutral States in general
- World War II and Inter-War Era
- ↳ WW2 in Africa & the Mediterranean
- ↳ WW2 in Eastern Europe
- ↳ WW2 in Western Europe & the Atlantic
- ↳ WW2 in the Pacific & Asia
- ↳ Winter War & Continuation War
- ↳ Spanish Civil War & Legion Condor
- ↳ Economy
- Other Eras
- ↳ First World War
- ↳ Imperial Germany
- ↳ German Colonies and Overseas Expeditions
- ↳ Austria-Hungary 1867–1918
- ↳ The end of the Ottoman Empire 1908-1923
- ↳ Other eras
- Research Help
- ↳ Translation help: Breaking the Sound Barrier
- ↳ Books & other Reference Material
- ↳ Archives
- Other areas
- ↳ Model building
- ↳ Movies, games & other fiction
- ↳ What if
- ↳ Reenactment
- ↳ The Lounge