Impulse Bearing

[Valtoro]

The Norwegian resistance managed in 1943 to get hold of the German schematics for a 100 Watt-Sender L.S. 100/108, Umformer U1500 and Schwerer Langwellensender Sa1500-111 (Saram?).

It was mentioned in connection with those schematics that the Germans experimented with Impulse bearing ("Impuls-peiling" in Norwegian) Is this a description for a radar with other words? Or is it just equipment for a radio beacon?

[T. A. Gardner]

While I can't clearly make out the first and third drawings, the middle one labeled "Schwerer Machinestaz A" is clearly a control circuit for a rotary amplidyne. When you close the three switches on the lower right they send power through a 3 phase Y transformer to provide single power to a rotary amplidyne controlled by the rheostat at the top right (in the lower drawing). The output is at the lower right but I can't make out what that is.
The upper part of the drawing is the indication circuit for the lower drawing running in parallel to it. You can see four fuzes going into a circuit that is capacitor coupled to ground for example. If this drawing were enlarged where I could read it clearly, I could determine its purpose better.

Amplidynes were typically used in this time period to control voltage inputs to things like generators or synchro's.

Sorry, but the upper and lower drawings aren't clear enough for me to determine what they do based on the electrical diagrams provided. If they were larger, I could figure out what the do based on the drawing alone.

[GregSingh]

Umformer U1500 was a power converter mainly used to provide power to 1.5 kW transmitters.
The input was 220 V or 380 V, output: 27 V, 440 V, 1000 V and 3000 V.
I have better quality schematics if anyone is interested.

[Valtoro]

Thanks to the both of you!

Sadly I don't have the possibililty to scan the photos.