hello i found an old hifi tranformer from amp.....the name of trans is AM-TS-780 NTK......i don't find something in web for this product....so i need your helps....the tranformer have 3 wires from one side and 4 wires from other side...the 3 wires is 1) black 2) 114 volt 3) 220 volt.....but the other wires i don't know...are 2 blue wires and 2 red........if i learn what are the wires, maybe make something from this tranformer......help me!!! 🙂
I don't know if i should tell you this - please don't kill yourself!
A foto would help, together with your measured resistances between all the wires (between red-114v, black-220v, between the two blue wires, the two red wires, both pairs of blue-red wires). The ratio of the resistance of black-220v : black-114v should be 2:1, roughly. The ratio of resistances in : out should lead you to a good estimation of output voltages you have to suspect.
Then I would connect the black wire and 220V to mains (here in europe!) and measure the output voltages on the other side.
HTH, and don't grill yourself or others,
yai.
A foto would help, together with your measured resistances between all the wires (between red-114v, black-220v, between the two blue wires, the two red wires, both pairs of blue-red wires). The ratio of the resistance of black-220v : black-114v should be 2:1, roughly. The ratio of resistances in : out should lead you to a good estimation of output voltages you have to suspect.
Then I would connect the black wire and 220V to mains (here in europe!) and measure the output voltages on the other side.
HTH, and don't grill yourself or others,
yai.
Last edited:
I'd start by connecting the primary to a sine generator (say 10 Vrms). The secondary output should be enough to measure with a DMM.
Samuel
- Status
- Not open for further replies.