The German Wehrmacht field phone FF33: Feldfernsprecher 33 was developed by Siemens & Halske in the early 30ies as replacement for the Feldfernsprecher 26. Compared to that latter it is a much more bare bones design. It has only LB support and no buzzer option is included. CB and dial network support can be added with external components.
Between 1933 and 1945 1.6 Million pieces were manufactured by more than 20 different providers.
The FF33 pictured here was made by Ferdinand Schuchhardt AG in 1937. This model has the initial electrical setup (used until 1939) and a light alloy body (later ones were made of steel).
The bakelite battery cup can be removed for easy cleaning in case of battery leaking.
Ready for use
Disassembled
Crank and light alloy body marked Ferdinand Schuchhardt,1937
Handset marked Ferdinand Schuchhardt,1937. Acceptance mark
Line connectors, Headset socket, Test button, Acceptance mark, Crank storage notch, red marked captive screws
Body with bakelite battery cup and lids mounted (held by bracket on the right). Lids have mesh covered openings to let bell sound through.
Body top, battery lid on the left, on the right storage cup for handset transmit side
Patch sockets on the left of the ringer. Coil on top of generator (red). Generator stamped with acceptance mark and labeled with Ferdinand Schuchhardt logo
Capacitor between generator and ringer. Top middle test button contacts and handset plug contacts.
Bakelite box open and empty. The cable opening on the left has rubber gaskets. The closed box is rainproof but not watertight.
Electrical diagram, FF 33 type pre 1939 with transmitter - battery circuit connected to main circuit and receiver circuit separated by coil.
Wiring diagram
Spelling alphabet (pre 1939 version)
RX and TX elements. Standard PTT size but FF 33 specific types. The green cross on the transmitter indicates type for post 1939 FF 33 electrical setup (= wrong type for this instrument, working but not ideal), WaA acceptance mark: 7 (for signal equipment department) 41 (assuming year 41) on TX element
RX and TX elements. Standard PTT size but FF 33 specific types. The green cross on the transmitter indicates type for post 1939 FF 33 electrical setup (= wrong type for this instrument, working but not ideal), WaA acceptance mark: 7 (for signal equipment department) 41 (assuming year 41) on TX element
Feldelement type Baumuster d (T30). Made in week 5 of 1945 by rvx (unknown disguised manufacturer label)
All stowed for storage or transport
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