Hello folks! I've got some questions about a power transformer I just obtained recently. This is my first attempt at building a dual +/-9V power supply. I do not have issues building the thing but I have questions on this model of transformer. Take a look at the picture attached:
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As far as I know, the primary windings usually have two connections, one live and one neutral right? But this one has three and as stated on the plate, it's 230V - 115V - 0V. Does this mean this transformer has two modes (~20:1 and ~10:1)?
How do I connect these wires to a power plug anyway? I assume the signal (red or black) connects to the live and ground goes to neutral?
For the secondary winding, is it safe to assume that it means 12V, ground and -12V?
I could appreciate some safety tips on building a power supply. I personally got shocked by just measuring the DC resistance at primary (230V to 0V) without any connection to mains. I got a 40 ohms anyway.
Any hint would be greatly appreciated! Thanks and cheerio....
**broken link removed**
As far as I know, the primary windings usually have two connections, one live and one neutral right? But this one has three and as stated on the plate, it's 230V - 115V - 0V. Does this mean this transformer has two modes (~20:1 and ~10:1)?
How do I connect these wires to a power plug anyway? I assume the signal (red or black) connects to the live and ground goes to neutral?
For the secondary winding, is it safe to assume that it means 12V, ground and -12V?
I could appreciate some safety tips on building a power supply. I personally got shocked by just measuring the DC resistance at primary (230V to 0V) without any connection to mains. I got a 40 ohms anyway.
Any hint would be greatly appreciated! Thanks and cheerio....