Dynamotor power-supply

The Lo1UK35 Dynamotor power-supply had 4 different Voltages that could be used 24V 65V 110V and 220V. 220V could only be used by adding a large resistor to the input of the power-supply. This power-supply would have mainly been used inside Ships like the German E-boat Schnellboot.

Visible in the Front window is that the 110V motor is inserted. It needs a 4Amp fuse. The fuse is above the power socket on the left bottom side. The big rotary knob in the middle should always when turned on be turned fully to the left. It increases or decreases the Heater Voltage. On the right side is the connector for the Lo1UK35 radio.

On the side the Vent for the Motor is visible. The Power-supply is sadly repainted.

On the inside the power-supply is in almost mint condition. The 4 screws marked red can be removed to switch the motor for one with a different Voltage.

On the left side on the bottom the controls for the Grid Voltage and Anode Voltage are located. Grid Voltage is -3V and Anode Voltage is 120-130V. The power-supply uses a STV280/40 Voltage stabilizer tube and a Eisenwasserstoffwiderstand.

On the bottom a loot of components are shielded so the motor doesnt induce hum.

Here a loot of capacitors are visible for filtering. Also relays are located here to turn the power-supply on remotely and protect tubes.

Here the controls can be seen from the bottom.

The big Potentiometer for the Heater voltage and the power socket.

Here are two different Dynamotors for the power-supply. One is 110V the other is 24V.

The 24v version needs a 10Amp fuse instead of a 4Amp fuse.

The 110V modell only needs a 4Amp fuse tho in reality a 6Amp fuse was commonly used.

Here the type Plate. It gives all Information needed.